100-Square Challenge
Save behavior varies by game. Check the notes below.
Player notes
About this game
Start on the marked square in the upper left. Every subsequent move goes two squares along one axis and one along the other. The highlighted squares show your legal moves. Try to reach the edges before the convenient exits disappear.
The browser adaptation follows Jasen Borisov’s TAJJAVA v0.1 and fixes the historical restart and first-move undo behavior. You can undo the last move and try a different route.
Start here
Quick tips
Plan a few moves ahead whenever a region has only one entrance left.
After Undo, take a different highlighted square from the restored position.
- Arrow keys
- Move keyboard focus around the board.
- Enter / Space
- Place the next number on the focused square if the move is legal.
- Touch / pointer
- Tap a highlighted square to place the next number.
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Archive notes
Rights and Source Notes
Browser play is available for this entry. Official project references are listed below.
- Distribution
- AGPL-3.0-or-later
- Browser player
- JavaScript · Browser play
- Added to archive
- 2026-11-14
- Official references
- Source code
- Download open-source code packageSource code only; this is not a game ROM download.
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