Check in chess
Stockfish 16.1 · runs in your browserPlay Bd3+. Moving the bishop uncovers the rook on e1, which checks the king on e8.
Play on the board, or use Type a move below it.
Play a move by typing it, like e4, Nf3 or e7e8q, then press Enter.
Commentary
Move a piece, paste a position, or press the button.
Best move
Check means your king is attacked. You must remove the attack by moving the king, capturing the attacker or blocking the line when possible. You cannot ignore check or make a move that leaves your own king attacked.
Try the moves
Choose an example, play the suggested move, then reset to compare another legal move.
Rules and examples
The board positions are original teaching examples. Rule references and further practice are linked below.
Rules: FIDE Laws of Chess, effective 1 January 2023. https://handbook.fide.com/chapter/E012023
Rule replay: python-chess 1.11.2 (GPL-3.0-or-later). The shared browser engine retains its Stockfish GPL-3.0 notice. No engine score is claimed by these demonstrations.
Read the rulesA move on the board
4k3/8/8/8/8/8/4B3/K3R3 w - - 0 1
4k3/8/8/8/8/3B4/8/K3R3 b - - 1 1
- Bd3+Moving the bishop uncovers the rook on e1, which checks the king on e8.
Moving the bishop uncovers the rook on e1, which checks the king on e8.
Original teaching example replayed with python-chess 1.11.2, 2026-10-18.
Analysis runs on Stockfish 16.1 in your browser, compiled to WebAssembly by stockfish.js. Stockfish is free software under the GNU General Public License v3; its source code is on GitHub.