Lionel Kieseritzky lost this game — and the engine says it slipped away on move 20 (Na6). They think you'd have lost it too. Take the board at that exact moment and prove them wrong.
On move 20, Black played Na6, which looked safe but walked straight into a devastating tactic. White's best response Ba6 followed by Nc7+ created an inescapable fork that won material decisively. Black went from slightly worse (up 155 cp) to completely lost (down 1500 cp) in a single move.
Done gloating? Your own games have moments like this too — we'll find them.
Analysis by Stockfish; commentary AI-written from the engine's findings. BetterChess is a practice tool — no rating guarantees, only fewer blunders.