Collect boost squares for extra moves and supercharged pieces.
How to play
Turn-based chess, you are White. Glowing boost squares appear on the board. Move a piece onto one to collect it: +1 grants your side an immediate extra move this turn, ⇱ charges that piece so its next move may also use queen and knight moves. A new boost spawns every few turns. Check rules apply: no move, not even the first of a double move, may leave your king attacked (charged pieces count). An extra move may not capture the king, and an extra move with no legal move is skipped. Checkmate wins; stalemate is a draw. 50 moves in a row without a capture or a pawn move is a draw. Pawns promote to queens; no castling.