Alireza Firouzja: 54.Be4? (blitz, 2024-05-18)

Deep puzzles: what the analysis missed

8 moves

Alireza Firouzja to move, White. Lichess's analysis gave the move played no mark (-1.30 before, -1.20 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: -1.30 to -1.20, no label. At 20M nodes: mistake, 10.0 win% given up, 13 points worse than Bd3.

inaccuracy: 5.7 win% given up, eval -4.31 after. The engine wanted the line in the sibling branch.

mistake: 12.5 win% given up, eval -2.84 after. The engine wanted the line in the sibling branch.