Engine analysis after the game revealed that 22. Nxc6 would have picked up my rook. 22. Rad1 was a blunder in fact. On the other hand, many moves I played prior to that were also blunders (or at least mistakes) as they allowed my rook to be lost.
A mediocre game
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Today I played a game full of blunders and mistakes by both sides. However, I won!