Blitzdoku

Race your friends on the same sudoku, live — watch every square they fill. Per-difficulty ELO, six themes, no ads, no tracking.

Sudoku, together. Blitzdoku is classic sudoku with a live multiplayer twist. Race friends on the same puzzle, watch their progress square by square, and climb per-difficulty ELO ratings • Offline single-player with five difficulties, from Easy to Master • Live multiplayer: create a room, share a link, race — cross-platform with blitzdoku.com in any browser • Per-difficulty ELO ratings, leaderboards, head-to-head comparisons, and solve timelines • Spectate finished games, rematch votes, pencil notes with smart clearing • Six hand-tuned themes, light and dark • No ads, no tracking