Here’s my rd5 game. I was winning for a large part of the game and then received a shock on the last move of the game.

Reader’s comments
‘You should at least say that 63. … cxb4 ?? is the Blunder. The answer 64.Qf7 would have been more striking…And your comment “wins the trapped bishop” is funny. Why on earth shall someone win this useless bishop?’-Thomas Heyl

Toth,A(1578)-Yip,M(2075)
Philidor[C41]
Xmas Open (5), 29.12.2012

Position 1
Black has a great positon. White is playing without Ba2 and has a completely static pawn structure. How should black continue?

Black to Play

Position 2
Things look bleak for white. Black threatens …Qa3# and is a pawn up with a fantastic knight. What should white do?

White to Play

(3am-Dec 30 2012: Analysis of late stages updated.)