bartonlaos: The game lists a sac at <26...dxc4>, but I'd like to draw interest to a later one for endgame technique. Stone Tempo Pilots:
I'm starting with the position after <30. g3>:
 click for larger viewBlack, who is a bit behind in material, pilots his queen from <a8>, through the field of play, down to the <e2> square counter-intuitively initiating a trade of queens. The prospect makes White happy, and his king waits by dancing. In my opinion, it's this royal shuffle which creates a psychological effect that loses the game - but only for an amazing win! <30...Qe8 31.Kf1 Qc6 32.Kg1 Qe4 33.Rbc1 Qe2 34.Qxe2 Rxe2> In the subsequent moves, White pushes passed to force a doubling of his opponent's pawns, and although his passed one looks menacing, it's Black's pawns which are stronger:  click for larger view<36...Rb2 37.Rb1 Rxb1 38.Rxb1 Be5 and 39.Kf1?> Unfortunately here is where I think the psychological effect takes place. The confident King returns to his safe habits on the shuffling square. Instead, he needed to get up off the back rank (Kg2). Now, it's quite remarkable, but after <39...c2 40. Re1> it's a winning position for Black! Black to move and win:
 click for larger view<40...d3!> With stone-cold calculation, Black allows a bishop sac! After cleanup and the White pawn is safely promoted, <41...d2 42. b8=Q+ Kg7 43. Rc5 c1=Q+>, it becomes apparent why it was so important for the king NOT to return to his shuffling square: TEMPO. Here, after <44. Rxc1>:  click for larger viewBlack plays <44...dxc1=Q+ 45. Kg2> and the lost tempo gives his queen time to own the position at <45...Qc3>, guarding the critical diagonal to defend her king while bringing home the promotion! 0-1 |