Sergei Zhigalko: 34...Qa4? (blitz, 2026-07-12)

Deep puzzles: what the analysis missed

3 手

Sergei Zhigalko to move, Black. Lichess's analysis gave the move played no mark (-1.30 before, -0.98 after). A 20-million-node search calls it a mistake, 12 win-chance points against a best move that is unique. Find it before opening the sideline.

The game move. Lichess: -1.30 to -0.98, no label. At 20M nodes: blunder, 15.6 win% given up, 12 points worse than Nh3+.