Draws a lichess-style arrow from the last move's origin to its destination
(persists until you reply) and pulses the destination square when a new move
lands, so the opponent's move can't be missed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Play by shareable link, vs the Radical Bot, or pass-and-play. Server-authoritative
moves (chess.js) in a per-game Durable Object, clocks with idle flag-fall via DO
alarms, draw/resign/rematch/chat, D1 game archive, custom board UI (drag + click).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>