Dmitry Andreikin: 47...Qf1+? (blitz, 2026-08-28)

Deep puzzles: what the analysis missed

2 moves

Dmitry Andreikin to move, Black. Lichess's analysis gave the move played no mark (-0.71 before, -0.72 after). A 20-million-node search calls it a mistake, 15 win-chance points against a best move that is unique. Find it before opening the sideline.

The game move. Lichess: -0.71 to -0.72, no label. At 20M nodes: mistake, 11.8 win% given up, 15 points worse than Qg3.