Black, 472 vs. Riley Deane, Unrated

My final game of the event was very nearly unremarkable. It felt very even up until the endgame. However, Stockfish considers White to have had a substantial advantage up until halfway through the middlegame, at which point I was slightly ahead more or less until move 27.

After White's 27. Qb4, the evaluation was very nearly even (-0.2), and indeed at this point my opponent suggested a draw. I considered it (this would have been my very first draw in an official game), but I felt that twenty-seven moves in was a bit early. Then, alas, I thought—erroneously— that 27...Qxb4 28. Nxb4 Ba5 would pin White's knight to his rook and allow me to win one of them, and so I played on; only to regret it immediately when White reversed the pin with 29. Ra1. White had a crushing advantage for the remainder of the game.