Duke of Brunswick lost this game — and the engine says it slipped away on move 15 (Nxd7). They think you'd have lost it too. Take the board at that exact moment and prove them wrong.
On move 15, Black played Nxd7, capturing a knight that wasn't even under attack. Instead of the forcing Qxd7, which keeps the position playable with a queen check on b8, this move dropped a whole piece into Morphy's lap. Sometimes the loudest mistake is the one where you capture air.
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.