Puzzles
Interactive pages built with Claude Code for the Jane Street monthly puzzles. Most are solvers you fill in yourself; one is a board that walks itself while you watch.
About these pages
Everything you do here persists to your browser's local storage, so a reload keeps your progress. The solvers also have export and import buttons, for saving a board to a file or moving it to another device.
August 2026: Andy's Afternoon Amble
Andy the ant wakes up on the wrong surface and has no way to tell. Read the floor the way he does, watch the cage close around him, then run ten thousand afternoons and see the tally settle onto the exact answer.
July 2026: Pent-Up Frustration
Place one tower per region, then walk the knight from the bottom-left square. Scores, clue checks, and the answer update live as you build the path.
May 2026: Arch Madness
Set the grid size, paint green cells, and cycle arcs through white cells. Scores update live, and a built-in solver can enumerate valid completions for cells you mark uncertain.