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This is my last round loss against Anthony Parker(1982) from the 2007 WCA Veterans tournament. My record against Anthony is now a dismal 0-5. I am sure that the fact that I had lost every previous game against him had some effect on my mental state during the game.
I went into the last round with 3.0/4.0 A win would have put me at a respectable 4.0/5.0 and a tie for 3rd place, but like many times before I lost an important last round game.
It has been a while since I got into a IQP game (with either side). The most important thing to remember is that the person with the IQP needs to be on the offensive and make use of the extra space in the middle game, since going into an endgame will favor the other side.
I was happy when Black played h6 and g5, I knew that in the long run this weakening of the king side pawn structure could be exploited. In response I moved the my bishop to the b1 diagonal got my queen to d3, and attacked the g pawn. (with the wrong pawn)
When I developed my last piece, the queens rook to the c-file (17 Rac1), I was very happy with my position, but it all fell apart quickly after Black played 23...f5.
I think that the move that lost the thread of the game for me was 20.h4?! I really wanted to play 20.f4!?, and after the game I realized that this would have given Black the most trouble. The reason I played h4 instead of f4 is that I thought that f4 would loosen my king position, although this is true, I could have caused more trouble for Black since f4 also threatens f5.
Some interesting IQP links:
IQP: Exeter Chess Club
IQP: Bangor Chess Club
Interesting IQP games from chessgames.com (Many losses by Karpov!)