Chess — pick how strong your opponent is

Start position — white to move.

Drag a piece, tap it and then tap where it should go, or play with the keyboard. The board only ever offers moves the rules allow. Pick a strength, start the engine, and play against it.

Opponent

Engine: not started

Opponent strength

The two low bands are marked approximate: those numbers are our own rough targets, not measured ratings. The tiers from 1320 up come from the engine’s own rating ladder. Your choice is remembered in this browser, so this page opens on it next time — no account, nothing uploaded.

The board is yours to play on both sides until you start the engine; starting it puts the opponent in the game, playing the other side. Changing the strength mid-game is safe — it re-applies the engine’s options and leaves the position and the move list alone.

Your side

Play as

White — you move first Black — the opponent moves first

Show coordinates on the squares

You are White.

Changing colour starts a new game, because who moves first is a property of the game and not of the view. Flip board only turns the board round; it does not change which side you play.

Game

Undo takes back the last move. Resigning ends the game in the opponent’s favour; new game starts over.

Moves

No moves yet.

Your rating

Rating: —

Games counted: 0

Suggested opponent next game: nothing yet — the rating starts with your first finished game.

A rough progress signal, not a measured rating: the strengths it moves against are approximate targets themselves. It starts at the strength you first play against and drifts with your results, and it is kept in this browser only — no account, nothing uploaded. The suggestion is a default, never a lock: it is marked as the suggestion beside the strength list above, and picking any strength yourself always wins.

Board