DDT3000-Chanchar, 2009, White to move
White won the exchange in a typical IQP/hanging pawns structure, but Black has broken through on the queenside by just capturing on c3.
I played 21. Nxf7 and later failed to win the game. But another typical sacrifice (which I did not have time to calculate) was much stronger.
21. Bxe6!! was winning. If black takes on e6, he loses the f6 knight and is under attack. If Black takes on h3, White takes on f7 with check, and then recaptures the queen, remaining up an exchange and a pawn. There was not all that much to calculate, but I missed this chance in my 3 0 ICC game.