LABS
Playable Weekly Puzzles
Browser-playable mini-puzzles. A side-by-side workshop with AI, exploring what a puzzle can be. Updated whenever inspiration strikes.
Tetris for Masochists
Ordinary real-time Tetris — except the only pieces that ever fall are the two most awkward ones, S and Z. Rotate and place them to clear lines and survive as long as you can. A browser-only experiment.
Cointossweeper
Real Minesweeper is always solvable by logic; this one only ever serves the unsolvable 50:50. Guess which of two covered cells is the mine and chase the longest streak.
16-Clue Sudoku
Only 16 clues. A uniquely-solvable Sudoku needs at least 17, so this one always has multiple solutions; any rule-valid filling of all 81 cells counts as a clear.
Gomoku: First Player Always Wins
Free-style Gomoku is a proven first-player win (Allis, 1994). You go second against a first-moving CPU and cannot win in principle — feel the theorem by losing.
