Sergei Zhigalko: 12...h6? (blitz, 2026-08-15)

Deep puzzles: what the analysis missed

8 moves

Sergei Zhigalko to move, Black. Lichess's analysis gave the move played no mark (-1.54 before, -1.07 after). A 20-million-node search calls it a mistake, 13 win-chance points against a best move that is unique. Find it before opening the sideline.

The game move. Lichess: -1.54 to -1.07, no label. At 20M nodes: mistake, 13.0 win% given up, 13 points worse than Nd4.