Gelfand - Ponomariov, tiebreak round 4

Gelfand-Ponomariov

Black to move played 25...Bxb3!?

 
Former FIDE World Champion Ruslan Ponomariov of Ukraine just won a clutch game with Black to tie up the playoffs with Boris Gelfand of Israel.  Match score is 4-4: play continues immediately.  

Yury Shulman at the World Cup, Round 1, Game 2

Just click on the arrows to play through the game. The match is tied 1-1: playoffs are tomorrow.

Eric Rosen knocks off his first grandmaster

Fedorowicz-Rosen

Black to play and win

Eric Rosen, a 15-year-old student at Niles North High School, had an OK summer as a chess player.  He won the U.S. Junior Open, earned the National Master title, and beat his first Grandmaster in the final round of the 2009 U.S. Open.

GM John Fedorowicz introduced a risky-looking but basically sound opening novelty, which Eric managed to neutralize.  Even GMs can make mistakes: in the above position, Fedorowicz has just played his king from d2 to c3.  White would have been perfectly OK after 16.Kd2-c1!, but Black could have forced a draw.  (For full analysis of this game, see the September Illinois Chess Bulletin.)

But after 16.Kd2-c3??, Black has a quick kill.  Can you find it?