Sergei Zhigalko: 19.Bxc6? (blitz, 2026-08-15)

Deep puzzles: what the analysis missed

8 moves

Sergei Zhigalko to move, White. Lichess's analysis gave the move played no mark (+1.45 before, +1.62 after). A 20-million-node search calls it a mistake, 11 win-chance points against a best move that is unique. Find it before opening the sideline.

The game move. Lichess: +1.45 to +1.62, no label. At 20M nodes: mistake, 14.9 win% given up, 11 points worse than Bf4.