Our new pedagogical series in which we look at a portion of a game I played the previous weekend in which some obvious tactic is overlooked. Readers are invited to practice their skill by seeing if they can spot what was missed.
Our game today is Horton-Gella Bitrian, Huesca 2007, which after White's fifteenth move (15.Nc3-d5) reached the following position:
Play then proceeded 15...Bxd5 16.cxd5 b5 17.Rad1 Nc4 18.Bc1 Nb6 19.Qf1 with a difficult midlegame ahead for White.
However, somewhere during this sequence one of the players missed a simple and winning tactic. Can you spot it? The game can be played through below if it helps. There were other serious mistakes as well...
(Again, answers in the comments box - so don't read it until you've had a go at solving it.)