Double check in chess
Stockfish 16.1 · runs in your browserPlay Bb5+. The bishop on b5 and rook on e1 both check the black king.
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Commentary
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Best move
Double check attacks the king with two pieces at once. Here the bishop moves to b5 and uncovers the rook on e1, so both give check. The player must move the king to answer a double check.
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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.
See the referenceA move on the board
4k3/8/8/8/8/8/4B3/K3R3 w - - 0 1
4k3/8/8/1B6/8/8/8/K3R3 b - - 1 1
- Bb5+The bishop on b5 and rook on e1 both check the black king.
The bishop on b5 and rook on e1 both check the black king.
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.