Version 7.1.3-exp — Desktop Directional Snapping

• Added desktop-only continuous-stroke snapping for Edge and Path dragging.
• New edge segments must connect to the last accepted segment, preventing stray branches when the mouse crosses nearby grid lines.
• Straight continuation is preferred; 90-degree turns use a short hysteresis distance so small pointer wobble does not create accidental corners.
• Cell-center paths now advance through one orthogonally adjacent cell at a time from the last accepted cell instead of jumping diagonally when the pointer wanders.
• Mobile remains tap-based and is unchanged.

Version 7.1.2-exp — Desktop Fillomino Assist

• Enabled the experimental Fillomino completion rules explicitly for desktop direct-input gestures.
• Desktop room-border drawing now runs a final Fillomino Assist pass when the mouse gesture ends, after the complete boundary is in place.
• Desktop hover-entered Fillomino final values continue to trigger the same auto-fill, truth/liar, Nurikabe, and automatic-border rules.
• Mobile behavior is unchanged.

Version 7.1.1-exp — Fillomino Completion Trigger Fix

• Fixed completed Fillomino regions not auto-filling when the final action was drawing a room border.
• Fillomino Assist now reevaluates immediately after shared room-boundary edits made from either Fillomino or Country Road.
• A newly closed region whose area equals its single confirmed final value now fills every remaining cell with that value and updates original-clue truth/liar consequences in Nurikabe.

Version 7.1.0-exp — Experimental Fillomino Assist

• Added an experimental auto-completion rule for fully bounded Fillomino regions: if the region area matches its confirmed final value, remaining cells are filled automatically.
• Original clues filled with their own value become truthful/green; original clues filled with a different final value retain the replacement value and propagate liar/black status to Nurikabe.
• Automatically places a shared region border between orthogonally adjacent confirmed final values when those values differ.
• Auto-created Fillomino borders mirror to Country Road and all automatic consequences are included in the same Undo/Redo action as the triggering edit.
• Auto-derived cells and borders are tagged and recomputed when confirmed information changes, reducing stale automatic deductions during experimentation.

Version 7.0.17-dev — Fillomino Number Fix / Mobile Stroke Balance III

• Restored explicit mobile Number-tool editing for Fillomino clues and working values.
• Kept permanently truthful Fillomino clues locked as intended.
• Reduced mobile-only room, edge, path, and loop strokes from 4 px to 3 px.
• Kept desktop stroke widths unchanged.

Version 7.0.16-dev — Mobile Stroke Balance II

• Reduced mobile-only player-drawn room, edge, path, and loop strokes from 6 px to 5 px.
• Reduced mobile-only X marks from 4 px to 3 px.
• Kept desktop stroke widths unchanged.

Version 7.0.14-dev — Gray-Cell Number Restriction

• Restricted Kurodoko and Nurikabe working-number entry to the gray # clue-position cells only.
• Ordinary white cells now cycle only through their puzzle cell states and can no longer receive working numbers.
• Desktop hover entry remains active on gray # cells in both individual views and Overview.
• The mobile Number tool likewise ignores non-gray Kurodoko and Nurikabe cells.

Version 7.0.13-dev — Desktop Hover Entry Everywhere

• Generalized desktop hover-based keyboard/object entry to every grid that accepts working numbers or Akari bulbs.
• Hover targeting now works in both individual views and the transformed Overview, including multi-view panes.
• Fixed-clue-only grids remain protected and do not become keyboard targets.

Version 7.0.13-dev — Desktop Hover Entry

• Desktop number entry now targets the cell currently under the mouse pointer; clicking a cell first is no longer required.
• Akari L/Space bulb entry follows the hovered Akari cell using the same model.
• Moving the pointer off an editable grid clears the keyboard target, preventing stale-cell edits.
• Mobile tap selection and keypad behavior are unchanged.

Version 7.0.13-dev — Explicit Akari Bulb Entry

• Removed light bulbs from the normal Akari Cell-state cycle and removed the experimental yellow-chain bulb-skip logic.
• Made the mobile Number/Object tool context-sensitive: on Akari it explicitly toggles a light bulb; on numeric grids it retains number entry.
• Changed the mobile Number icon to a compact #/bulb symbol for Overview use.
• Added desktop Akari bulb shortcuts: L or Space toggles a bulb in the most recently selected Akari cell.
• Explicit bulb changes continue to mirror to highlighted Shikaku clues only where a printed Shikaku clue exists.

Version 7.0.10-dev — Akari Yellow-Chain Bulb Skip

• Akari now skips the bulb state when a candidate cell is connected orthogonally to an existing bulb by an unbroken chain of confirmed yellow cells.
• Both solid yellow and yellow-with-dot cells count as confirmed illuminated cells in that chain.
• The rule applies while cycling forward or backward, preventing a transient invalid bulb from reactivating a mirrored Shikaku clue.
• Unknown, white, black, masked, or other non-yellow states break the chain, so the editor does not assume a future wall position.

Version 7.0.9-dev — Hitori Mobile Numbers

• Gave the editable Hitori grid its own explicit mobile Number keypad handler instead of routing keypad taps through the desktop keyboard path.
• Mobile Hitori Number now writes directly to the selected Grid 11 cell and Backspace/Erase clears only that working number.
• Kept Grid 7 Hitori as fixed-clue input while preserving its cell-state editing and Akari black-cell mirroring.

Version 7.0.8-dev — Slitherlink Mobile Numbers

• Made the mobile Slitherlink Number tool select the full cell area instead of using the desktop edge dead band.
• Restricted Slitherlink working numbers to 0–3 on the mobile keypad.
• Temporarily hides keypad digits 4–9 while editing a Slitherlink cell.

Version 7.0.7-dev — Combined Clue Arithmetic

• Made every gray Kurodoko/Nurikabe # cell explicitly selectable in the mobile Number tool.
• Entering a number at a combined-clue position now fills the other component automatically so Kurodoko + Nurikabe equals the fixed superimposed clue.
• Editing either component recalculates the other; impossible zero/negative complements are rejected.
• The mirrored pair is stored as one logical Undo/Redo action.

Version 7.0.6-dev — Mobile Tap Tools & Erase Override

• Added an Erase toggle to the mobile tool strip. Erase combines with the selected Cell, Edge, Path, or Number tool and affects only that category.
• Made Pan and Erase mutually exclusive overrides; turning either off returns immediately to the remembered editing tool.
• Changed mobile Edge and Path editing from drag drawing to tap-based editing. Edge taps snap to the nearest grid line and cycle that edge's states.
• Path taps on an internal cell boundary add/cycle the center-to-center segment crossing that boundary.
• Desktop direct-input drag behavior is unchanged.

Version 7.0.5-dev — Compact Mobile Solving Header

• Removed the legacy standalone Pan control from the phone layout; Pan now lives only in the mobile tool strip.
• Removed the dedicated mobile zoom row. Pinch-to-zoom remains available, while Fit and 100% remain accessible from the mobile menu.
• Reclaimed the old controls-row space for the puzzle viewport without changing the desktop interface.

Version 7.0.4-dev — Mobile Stroke Visibility

• Increased player-drawn edge, room-boundary, path, loop, and X stroke widths on phones so solving marks remain clearly visible over the structural grid.
• Removed the obsolete standalone Pan button from the mobile zoom row; Pan now exists only as the override button in the mobile tool strip.
• Kept desktop stroke widths and desktop direct-input behavior unchanged.

Version 7.0.3-dev — Mobile Edge Hit Area Fix

• Hides the mobile tool strip whenever the compact Menu dialog is open.
• Replaced narrow desktop-style edge hit testing on touchscreens with generous nearest-edge snapping while the Edge tool is selected.
• Edge tapping and dragging now use the same forgiving snapping on Overview and individual rectangular grids.
• Expanded Slitherlink touch-edge tolerance while preserving its dot-lattice geometry.
• Desktop direct-input hit testing remains unchanged.

Version 7.0.2-dev — Mobile Tool Strip

• Added Cell, Edge, Path, Number, and Pan icons for touch editing.
• Pan acts as a temporary override while preserving the previously selected editing tool.
• Overview shows all editing tools; individual grids hide tools that do not apply.
• Added a touch-friendly numeric keypad for the Number tool.

Version 7.0.1-dev — Compact Mobile Workspace

• Collapsed phone-only file, checkpoint, utility, navigation, print, settings, and help controls into a large touch-friendly Menu dialog.
• Kept only Overview/Rules navigation, Pan, and compact zoom controls visible while solving on phones.
• Removed desktop-only mouse and keyboard instructions from the mobile layout.
• Enabled vertical page scrolling on phones and gave the puzzle workspace its own substantial visible height below the compact header.
• Desktop layout and interaction remain unchanged.

Version 7.0.0-dev — Mobile Direct Input Experiment

• Started the 7.0 mobile branch from the stable 6.0 desktop direct-input release.
• Added a touch-only Pan toggle; mobile starts in Pan mode to prevent accidental puzzle edits.
• With Pan on, one-finger dragging pans the active viewport. With Pan off, taps and drags use the same direct puzzle input model as desktop.
• Added two-finger pinch zoom in either Pan or Edit mode while preserving the existing desktop mouse-wheel and middle-button behavior.
• Kept all 6.0 shared-state mirroring and puzzle logic unchanged for this first phone test.

Version 6.0.0 — Stable Desktop Direct Input

• Promoted the 6.0 desktop direct-input branch to stable without changing puzzle logic.
• Desktop editing now uses click / Shift+click for cell states, direct keyboard number entry, and drag gestures for edges and center-cell paths.
• Retains bidirectional mirroring for shared Octathlon features, including loops, rooms, black cells, clue truth, Masyu confirmations, and Fillomino/Nurikabe relationships.
• Preserves the complete 6.0 development changelog below as the implementation history for this stable release.

Version 6.0.9-dev — Forced Truthful Gray Nurikabe Cells

• Gray # cells in the blank Nurikabe grid are treated as permanently white clue positions.
• If a gray Nurikabe position corresponds to an original Fillomino clue, that Fillomino clue is always shown with a green truthful background.
• Those forced-truthful Fillomino clues are locked: their value and truth state cannot be changed, masked, replaced, or cleared.
• The working number in the corresponding Nurikabe # cell remains editable; changing or clearing that working number does not affect the Fillomino clue's permanently green status.

Version 6.0.8-dev — # Placeholders & Fillomino/Nurikabe Mirroring

• Gray Kurodoko and Nurikabe clue-position cells now show # until a working number is entered; those cells skip blank/dot/black click states and right-click restores #.
• Mirrored original Fillomino clue truth to Nurikabe: green = white/dot and red = black.
• Mirrored Nurikabe white/dot or number states back to green original Fillomino clues, and black states back to red clues.
• Entering a replacement Fillomino value different from the original marks the corresponding Nurikabe cell black; originally empty Fillomino cells do not participate.

Version 6.0.7-dev — Masyu Confirmation Backgrounds

• Changed confirmed Masyu clues to highlight the whole cell green while preserving the pearl's original black or white appearance.
• Both Masyu representations continue to share one pearl state cycle: normal → green confirmed → masked → normal; Shift+click reverses it.
• Confirming a pearl still copies its numeric value into the corresponding cell of the blank Corral grid.
• Clearing or masking a confirmed pearl removes the automatically mirrored Corral value, while independently typed Corral replacements remain independent.

Version 6.0.4-dev — Corral / Slitherlink Loop Mirroring

• Mirrored the blank Corral loop and Slitherlink loop as one shared edge solution.
• Drawing a loop segment in Slitherlink immediately draws the matching thick Corral segment, and drawing in Corral immediately draws the matching Slitherlink segment.
• X marks and erasing are mirrored bidirectionally, including outside-perimeter segments.
• Corral cell numbers/dots and Slitherlink working numbers remain puzzle-specific and are not mirrored.

Version 6.0.3-dev — Akari / Hitori / Shikaku Mirroring

• Mirrored Akari black cells with both Hitori grids in both directions.
• Mirrored Akari bulbs to yellow-highlighted Shikaku clues only where a printed Shikaku clue exists in the same cell.
• Added a yellow Shikaku clue state; selecting it creates the corresponding Akari bulb, while clearing or cycling away removes the mirrored bulb.
• Included all new mirrored states in Undo/Redo, checkpoints, save/load, and right-click clearing.

Version 6.0.2-dev — Center-path Dragging & Shared Features

• Fixed Masyu and Country Road path drawing so dragging through cell centers creates consecutive path segments.
• Country Road now locks a drag to room-boundary mode when it begins near a grid line, or path mode when it begins inside a cell.
• Mirrored shared solution data for Kurodoko/Heyawake black cells, Shikaku/Heyawake rooms, Fillomino/Country Road rooms, and Country Road/Masyu loops.
• Shared data can be added or erased from either representation and appears immediately on its counterpart.

Version 6.0.1-dev — Direct Clear & Fillomino Status

• Right-clicking the center of a desktop puzzle cell now clears every player-added property in that cell, including shading, marks, and working numbers, while immutable original clues reappear automatically.
• Right-dragging from an edge/path hit zone still erases edge and path marks without also clearing the ending cell.
• Fillomino proven-true and proven-false original clues now use green and red cell backgrounds instead of colored clue text.
• Fillomino clue numbers use contrast-aware black/white text, and entering a replacement number returns the cell to a neutral background.

Version 6.0.0-dev — Desktop Direct Input

• Started the desktop simplified-tool experiment: cell states are edited by click / Shift+click, and numeric working values are typed directly after selecting a cell.
• Room edges and loop/path segments are drawn by dragging directly on their geometry instead of choosing Edge or Path tools.
• Shift+drag places an X on loop/path editors that support X marks; right-drag erases edge/path marks.
• Collapsed desktop puzzle palettes to Clear Grid only. Mobile behavior is intentionally deferred while this interaction model is tested.

Version 5.0.16 — Tool-switch Performance

• Stopped tool changes from rerendering every puzzle editor in the workspace.
• Tool changes now refresh only the affected grid, preserving selection-indicator cleanup without full-workspace redraws.
• Capped Undo and Redo history at the most recent 50 actions.
• Older save files with larger histories are trimmed to the newest 50 Undo/Redo entries when loaded.

Version 5.0.15 — Overview Double-click Cleanup

• Removed the legacy Overview double-click action that opened an individual grid.
• Overview cards now consume double-clicks without navigating, preventing rapid clicks from unexpectedly changing the active viewport.
• Individual grids remain available intentionally through Multi-view.

Version 5.0.14 — Corral Perimeter Edge Editing

• Extended the blank Corral Edge tool to all four outside borders on both Overview and the individual Corral view.
• Perimeter segments now use the same dashed → thick → masked cycle as internal Corral edges.
• Moved the default dashed Corral perimeter into the editable SVG edge layer so each border segment can be independently changed or removed.

Version 5.0.13 — Corral Dashed Perimeter

• Changed the blank Corral outer boundary from a solid line to the same dashed treatment used by its untouched internal grid edges.
• Applied the dashed perimeter in both the Overview and individual Corral tab.

Version 5.0.12 — Pan Release Safety

• Fixed middle-mouse panning becoming stuck when the pointer leaves the browser before the middle button is released.
• Panning now stops automatically whenever movement or re-entry reports that the middle button is no longer held.
• Panning also cancels when the browser window loses focus, preventing stale drag state after switching away.
• Applied the same release safety to the Source Grids reference window.

Version 5.0.11 — Grid Boundary Buffer

• Changed rectangular puzzle outer boundaries to use the same thickness as the selected regular grid lines.
• Added a small light buffer outside every Overview and individual solving grid so perimeter edge marks remain distinct from the surrounding workspace in high-contrast mode.
• Applied the same buffer treatment to Slitherlink dot-lattice grids without adding an artificial outer border.
• Preserved the heavier player-drawn room, region, loop, and edge marks.

Version 5.0.17 — Corral Edge X Marks

• Replaced the blank Corral Edge tool's removed/masked state with an explicit X mark.
• Corral edges now cycle dashed → thick → X → dashed; Shift+click reverses the cycle.
• X marks work on both internal and perimeter edges in the Overview and individual Corral views.
• Legacy Corral masked-edge states from older save files are automatically migrated to X marks.

Version 5.0.18 — Hitori Confirmed-Good Cells

• Added a yellow confirmed-good cell state to both Hitori grids.
• Hitori Cell/Shade now cycles normal → yellow → black → normal; Shift+click reverses the cycle.
• Right-click and Erase still reset a Hitori cell to its normal state.
• The yellow state is preserved in enhanced high-contrast mode and in save files, Undo/Redo, and checkpoints.

Version 5.0.10 — Country Road Cell Marks

• Added Country Road Cell marks: dot means the path passes through the cell; X means no path passes through the cell.
• Added the Cell tool to the individual Country Road editor and enabled the shared Overview Cell tool for Country Road.
• Cell marks cycle blank → dot → X → blank; Shift+click reverses the cycle, and right-click or Erase clears the mark.
• Drawing a confirmed Country Road path line automatically clears dot/X marks from both cells connected by that segment.
• Country Road cell marks are included in Undo/Redo, checkpoints, save/load, Clear Grid, mirroring, and Hide Solution Marks.

Version 5.0.9 — Stable Overview Workspace

• Promoted the Overview-centered 5.0 workspace to the stable branch.
• Removed the experimental Overview notification.
• Retains direct Overview editing, persistent pan/zoom, Rules navigation, and optional Multi-view comparison.

Version 5.0.8 — Overview Editing Experiment

• Overview now opens initially zoomed to fit and centered on the full enlarged relationship canvas.
• Removed an obsolete 1470-pixel Overview width override so the pannable surface matches the actual 5.0 board dimensions.
• Overview zoom and pan are now preserved when switching to Rules or entering/leaving Multi-view.
• Scrollbar movement, middle-button panning, and wheel zoom all continuously update the remembered camera state.
• Returning from Rules normally restores the prior Overview camera.
• Clicking a puzzle heading on Rules remains the intentional exception: it replaces the remembered Overview camera with a zoomed, centered view of that grid.
• Loaded save files preserve their stored Overview camera; New Game starts with a fresh fit-to-board camera.

Version 5.0.7 — Overview Editing Experiment

• Simplified the visible tab bar to only Overview and Rules.
• Added a Multi-view button with checkboxes for all fourteen individual grids.
• Reopening Multi-view preserves the currently selected comparison grids so more can be added or removed.
• Selecting one grid opens it as a single comparison view; selecting two or more opens the existing side-by-side multi-view layout.
• Added Unselect All and a Return to Overview confirmation for quickly leaving comparison mode.
• Kept every individual grid view internally available so the established editors and multi-view behavior remain intact.

Version 5.0.6 — Overview Editing Experiment

• Audited Overview right-click clearing and added the missing erase handlers for Fillomino, the second Hitori, blank Corral, and standalone Masyu.
• Ctrl+Click on any Overview grid now jumps directly to that grid’s Rules section instead of changing multi-view state.
• Relationship to Other Puzzles remains as a plain heading; the old clickable relationship links were removed.
• Clicking a puzzle name on the Rules page now returns to Overview, zooms to fit that puzzle grid, and centers it in the viewport.
• Updated Overview and Rules navigation hints for the new workflow.

Version 5.0.5 — Overview Editing Experiment

• Completed the remaining Overview editors: Fillomino, the second Hitori, and the blank Corral.
• Fillomino uses Cell for its full clue/number state cycle and Edge for region borders, with direct keyboard number entry retained.
• The second Hitori uses Cell for shading; selecting a cell also enables the existing direct keyboard-number entry, preserving both individual-grid functions without adding another Overview tool.
• The blank Corral uses Cell for dot/number marks and Edge for its dashed/thick/masked line cycle, with direct keyboard number entry retained.
• Erase and right-click clearing work on all three newly enabled editors.
• Fixed Slitherlink vertical alignment by giving dot-grid cards the same bottom-alignment rule as ordinary Overview grids.
• Grid 6 Nurikabe remains the only reference-only solving grid.

Version 5.0.4 — Overview Editing Experiment

• Enabled Path editing on both pearl-bearing Masyu representations: Corral featuring Masyu and standalone Masyu.
• The Masyu path state is shared, so path edits made on either representation immediately mirror to the other.
• Enabled Cell on standalone Masyu to toggle pearl masking; Erase/right-click restores masked pearls.
• Preserved the Corral/Masyu Cell cycle for untouched, valid, and masked clue states.
• Adjusted Overview Masyu path and X stroke widths for the enlarged relationship-map scale.

Version 5.0.3 — Overview Editing Experiment

• Added direct Overview editing for Hitori, Corral, and Country Road.
• Hitori uses Cell to shade/unshade cells.
• Corral uses Cell to cycle clue status through untouched, valid, and masked.
• Country Road uses Path for its line/X route through cell centers and Edge for room boundaries.
• Erase and right-click clearing work across all three new Overview editors.
• The second Nurikabe remains reference-only and is intentionally not editable from Overview.
• Adjusted Country Road Overview strokes and the Corral valid-clue ring for the enlarged map scale.

Version 5.0.2 — Overview Editing Experiment

• Added direct Overview editing for Kurodoko, Shikaku, and Heyawake.
• Kurodoko uses Cell for its normal state cycle and direct working-number entry.
• Shikaku and Heyawake use Cell for cell states and Edge for room boundaries.
• Erase and right-click clearing work on both cell marks and room edges where applicable.
• Adjusted Shikaku and Heyawake Overview room-border stroke widths to match their individual-grid appearance.

Version 5.0.1 — Overview Editing Experiment

• Reduced Slitherlink line, X, and selection-outline stroke widths on the enlarged Overview so they visually match the individual Slitherlink grid.

Version 5.0.0 — Overview Editing Experiment

• Added a shared Cell / Edge / Path / Erase editing palette to Overview.
• Enabled direct Overview editing for Nurikabe, Akari, and Slitherlink as an initial three-grid experiment.
• Cell uses each puzzle’s existing cell behavior: Nurikabe cycles its normal cell states, Akari cycles its normal solving states, and Slitherlink edits working numbers.
• Edge edits Slitherlink loop edges. Path is present but intentionally inactive for these three test grids.
• Erase provides a dedicated clearing tool while right-click clearing remains available.
• Scaled the complete fourteen-grid relationship map so Overview grids render at the same 560-pixel visual size as individual grids.
• Raised maximum workspace zoom from 400% to 800%.

Version 4.0.25

• Restored direct grid-to-rules navigation so each “View … Rules” link jumps to and highlights the correct puzzle or variant section.
• Removed an obsolete title-bar refresh call left behind after draggable viewport support was removed.

Version 4.0.24

• Darkened the Kurodoko and Nurikabe clue-position guide cells for better visibility.

Version 4.0.23

• Added light-gray clue-position guide cells to the blank Kurodoko and Nurikabe grids.
• The guide cells match every clue location in the combined Nurikabe/Kurodoko grid and appear in both full grid views and Overview thumbnails.
• Guide cells are part of the puzzle framework and are not affected by solving edits, Undo, Clear Grid, checkpoints, or Hide Solution Marks.

Version 4.0.22

• Removed draggable/reorderable multi-view panes.
• Kept the centered pane title bar visible in both single-view and multi-view layouts.
• Multi-view panes still retain their close button; single-view panes do not show a close button.

Version 4.0.5

• Rebuilt checkpoints as color-coded branch anchors tied to the most recent puzzle edit.
• Added Blue, Red, and Green checkpoints, with one active checkpoint available per color.
• The edit at each checkpoint pulses in its checkpoint color; multi-location actions such as Clear Grid pulse the whole grid.
• Restore Checkpoint rolls the puzzle and Undo history back to that edit and jumps to its grid.
• Clear Checkpoint keeps the current branch unchanged and removes only the checkpoint marker.

Version 4.0.3

• Added a Clear Grid button to every solving-grid editing palette.
• Clear Grid removes only player-added marks from that grid and preserves all original puzzle clues.
• Clearing a grid is stored as one Undo/Redo action, so an accidental reset can be restored immediately.

Version 4.0.2

• Completed puzzle-wide Undo and Redo across all fourteen solving-grid editors.
• Undo and Redo restore the complete puzzle state and jump to the grid where the action occurred.
• Ignored no-op edits so clearing an already-empty location does not consume an Undo step.
• Added Ctrl+Shift+Z as an alternate Redo shortcut alongside Ctrl+Y.
• Improved Undo/Redo button titles and the history status text to identify the next action.

Version 4.0.0

• Rebuilt Save Game and Load Game around the complete 3.x editing state for all fourteen solving grids.
• Loading, Undo/Redo, and checkpoints now synchronize every live grid editor from the shared puzzle snapshot before rerendering.
• New Game now restores a true fresh-page workspace: all player marks, notes, history, checkpoints, selections, views, zoom/pan positions, and tool selections are reset.
• Persistent display and accessibility preferences remain unchanged when starting a new game.

Version 4.0.1

• Added a remembered preferred save folder using the File System Access API and IndexedDB.
• Save Game writes directly to the remembered folder when permission is available.
• Load Game starts in the remembered folder and retains the original file-picker fallback.
• Added Set Save Folder and Forget Save Folder controls in Settings.

Version 3.0.7

• Activated the Slitherlink Number tool with mouse cycling and direct keyboard entry for values 0–3.
• Activated the Slitherlink Erase tool for player-added edge marks and working numbers.
• Kept original puzzle clues protected by storing working numbers separately in player state.

Version 3.0.6

• Reduced Slitherlink X marks again to leave more room for cell numbers.
• Suppressed native right-button focus/context behavior on the editable Slitherlink canvas before X placement, reducing page movement that can interact poorly with screen magnification.

Version 3.0.5

• Reduced Slitherlink X-mark size to leave more room for cell numbers.
• Mirrored Slitherlink player edge marks live into the Overview thumbnail using the same underlying puzzle state.

Version 3.0.4

• Activated the Slitherlink Draw tool: left-click an edge to draw a loop line and right-click an edge to place an X.
• Restricted Draw hit-testing to narrow zones around valid dot-to-dot edges so cell-center clicks are ignored.
• Changed active puzzle-tool indication to a heavy high-contrast outline instead of a color-only state.
• Stored Slitherlink edge marks in player state so Undo, Redo, checkpoints, and save files can preserve them.

Version 3.0.2

• Ctrl+Left Click a grid card on Overview to add or remove that grid from the currently visible viewports.
• Ctrl+Left Click inside a solving grid to add or remove Overview from the current multi-view workspace.
• Overview can remain visible as a navigation pane while additional solving grids are selected directly from it.

Version 3.0.0

• Started the grid-editing branch with a Slitherlink proof-of-concept toolbar.
• Added Draw, Number, and Erase tools inside the Slitherlink viewing window.
• Anchored the grid-specific toolbar to the upper-left of the viewing window so zooming and panning do not move it.
• Prepared Draw as the combined loop-line/X tool: left-click line and right-click X behavior will be wired in next.

Version 2.0.2

• Restored the eight source grids to Mellowmelon’s original two-row, four-column arrangement.
• Kept the source grids on the left side of the Overview.
• Made the fourteen solving grids reflow automatically into additional columns as more logical workspace width becomes available.
• Made Overview width respond to the viewport and zoom level while preserving each grid’s relative size.

Version 2.0.1

• Moved the eight source grids into a left column and the fourteen solving grids into a right column.
• Added working grid-line thickness and enhanced high-contrast settings.
• Added automatic adaptation for Windows forced-colors mode.

Version 1.12.4

• Separated read expansion from note selection.
• Clicking a compact note now explicitly expands it for reading.
• Clicking elsewhere clears that reading state and compacts the note.
• Prevented simple clicks from being logged as note moves.

Version 1.12.3

• Fixed compact saved notes not expanding when clicked.
• Clicking a compact note now expands it for reading without entering Edit mode.
• Clicking elsewhere compacts the note again.

Version 1.12.2

• Made saved notes compact to one line when not selected.
• Clicking a note expands it to show its full contents.
• Clicking elsewhere compacts previously selected notes again.

Version 1.12.1

• Made the shared zoom controls act on the currently focused panel.
• Clicking or interacting inside a pane now makes it the active zoom target.
• Prevented editable note textareas from losing focus when clicked.

Version 1.12

• Allowed notes to be dragged in split view using temporary layout-specific coordinates.
• Preserved and restored each note’s full-view coordinates.
• Added an X button to every visible multi-view pane.
• Removed the startup recovery prompt; the app now always opens as a new game.

Version 1.11.3

• Unified Note Edit, Save, Delete, and Collapse handling.
• Stopped Notes from rerendering during scroll and Magnifier movement.
• Used prevent-scroll focus only after explicit New or Edit actions.
• Renamed File Diagnostics to Debugging and added File, Notes, and App filters.

Version 1.11.2

• Fit each visible grid to its viewport when opening a tab or entering multi-view.
• Docked every Notes menu to the upper-right corner of its viewport.
• Temporarily repositioned notes inside smaller split panes without changing full-view coordinates.
• Added delegated Edit, Save, Delete, and Collapse handling for dynamically rendered notes.
• Added Notes and multi-view events to Developer Mode diagnostics.

Version 1.11.1

• Fixed Notes controls being created after their event handlers were attached.
• Changed Notes controls to delegated event handling so dynamically created viewport menus always work.
• Added Notes actions to Developer Mode diagnostics.

Version 1.11

• Rebuilt Notes from the ground up using viewport-owned note layers.
• Each grid independently controls Notes visibility.
• Each viewport owns its own menu, notes, connectors, selection, and placement mode.
• Removed the full-screen Notes overlay that caused click conflicts.
• Preserved notes in save files and automatic recovery.

Version 1.10

• Added multi-view tab comparison.
• Ctrl+Click a tab to add or remove it from the visible workspace.
• Normal tab clicks return to a single-tab view.
• Added responsive split layouts for two, three, four, or more visible tabs.

Version 1.9.5

• Fixed missing application-state initialization that affected New Game, Load Game, and related controls.
• Confirmed successful loading of current .nikoli save files.
• Promoted the Notes and File Operations issues to Resolved — Monitoring.
• Retained file diagnostics behind an optional Developer Mode control in About.

Version 1.9.4

• Renamed the application to Nikoli Puzzle Workstation.
• Changed the help link label to Help.
• Added Known Issues and About tabs to Help.
• Changed Save Game so the in-app naming dialog closes before Windows Save As opens.

Version 1.9.3

• Fixed native Save As by changing the picker extension to the browser-compatible .nikoli format.
• Kept compatibility with older .nikoli-save files when loading.
• Stopped the full-screen Notes layer from capturing ordinary puzzle clicks.
• Made the Notes layer interactive only while selecting a new note anchor.

Version 1.9.2

• Fixed Notes toolbar and note-action clicks being reprocessed by the full-screen Notes layer.
• New, Auto-arrange, Save, Edit, Delete, and collapse/expand now respond on the initial click.
• Prevented note selection logic from interfering with interactive buttons and text fields.

Version 1.9.1

• Added a native Save As dialog where supported, with download fallback.
• Added save metadata for puzzle identity, creation time, app version, and save-format version.
• Added migration support for compatible older save files.
• Added an optional prompt to save an updated copy after loading an older save.

Version 1.9

• Added New Game beside Load Game and Save Game.
• Added save-before-load and save-before-new-game protection.
• Added an unsaved-changes marker in the browser title.
• Added a gear Settings button at the upper-right of the view controls.

Version 1.8

• Rebuilt Notes from the v1.7.1 base as an independent subsystem.
• Added anchored notes with connector lines.
• Added free two-dimensional dragging anywhere in the workspace.
• Added explicit Save while creating or editing a note.
• Added selected-note-only Edit and Delete controls.
• Added collapse/expand and Auto-arrange.
• Included notes in Save Game and automatic recovery.

Version 1.7.1

• Moved Save Game and Load Game beneath the application title at upper left.
• Changed the Rules tab so the mouse wheel scrolls normally instead of zooming.
• Retained the Rules-tab zoom buttons for optional manual magnification.

Version 1.7

• Renamed branch tools to Save, Restore, and Clear Checkpoint.
• Added previous/next arrows and Ctrl+Page Up / Ctrl+Page Down.
• Added portable Save Game and Load Game files.
• Added automatic browser recovery and a named-session startup prompt.

Version 1.6

• Expanded the solving workspace from eight to fourteen grid tabs.
• Kept Overview for all fourteen solving grids and reserved space for source-grid relationships.
• Added puzzle-wide Undo and Redo controls that jump to the affected grid.
• Added named Save State, Load State, and Clear State branch checkpoints.
• Added visible branch highlighting across all grids while a checkpoint is active.
• Replaced fixed print-layout choices with free-form rows and columns.

Version 1.5

• Added the final Rules tab, editable zoom, and full print preview.

Version 1.4

• Added the context/status bar and print prototype.

Version 1.3

• Split Shortcuts and Changelog into help tabs.

Version 1.2

• Added keyboard and Ctrl+click navigation.

Version 1.1

• Introduced the multi-tab workspace and camera controls.