Sergei Zhigalko: 20...Qd7? (blitz, 2026-07-12)

Deep puzzles: what the analysis missed

8 手

Sergei Zhigalko to move, Black. Lichess's analysis gave the move played no mark (-1.38 before, -1.30 after). A 20-million-node search calls it a mistake, 14 win-chance points against a best move that is unique. Find it before opening the sideline.

The game move. Lichess: -1.38 to -1.30, no label. At 20M nodes: mistake, 14.6 win% given up, 14 points worse than Rxd2.