White
10:00
Black
10:00
Notation
Moves
Opponent
CPU player
Match your average think time (Mario Kart–style clock evening). On by default.
Coin toss decides who plays White.
Controls
Look & saves
Local saves
Stored in this browser only.
Notation tips
- SAN/PGN:
e4,Nf3,O-O,Qxd5+,c8=Q#. - Standard numbering pairs both sides on one turn:
1. e4 e5 2. Nf3 Nc6. After Black’s reply, the nextN.(with the space) is typed for you so White can enter the move straight away. When the CPU plays White, a trailing space is left after its move so you can type Black’s SAN immediately. - Also accepted: numbered half-moves (
1. e4 2. e5 3. Nf3), repeated turn numbers (1. e4 1. e5), or Black dots (1... e5). - Legacy coordinates:
Pf2f4,Nb8c6. - Captures show beside the board with a running material score.
- Notation pause clock: typing pauses the timer; typing a move number (
1.,2.,1...) presses the clock for the side to move. Edit freely until then. - Live clock: follows each completed move and keeps running while you type.
- Flip the board for couch co-op without turning the device.
- Share copies a link with the current notation encoded in the URL hash. Opening that link loads the game from the start and autoplays to the end.
- Play controls under the board step through or autoplay the game; pieces slide into place (also during live notation updates).
- CPU player (off by default): toss a coin for White, then enter your moves in notation — Stockfish replies automatically. Strength uses Stockfish skill / Elo limits from beginner through full engine. Pace (on by default) makes the CPU take about your average think time so the clocks stay even; turn it off for instant replies at the chosen strength.