Wednesday, November 3, 2010

A position from the U.S. Game/30 championship

Black to play
Mark Robledo, Jr.-Bill Brock, Skokie 2010

It was a mutual time-scramble, but both players had more than one minute plus delay remaining when the above position was reached.  Black sees that White's king on c4 and pawn on d5 are both on the diagonal of the bishop on f7, and gets an idea.  Is it a bright one?

Evaluate the position: you are invited to use your computers!


GreenCastle said...

1...c6 would lose to 2.Qh8+.

2...Bg8 3.Qf6+ picks up the now unprotected B@d6.
2...Ke7 3.Qf6+ picks up one of the bishops.

I think this is drawn. I don't see what White can do if Black does nothing.

Bill Brock said...

Immedidately after the game, Mark mentioned the only critical try: to sac the queen on either d6 or c7 in a position when Black has to give the bishop back to stop the d-pawn. If this could be done, the pawn ending would be generally won (key squares).

But I don't see a way to do it.

Bill Brock said...

Oh, and yes, I played 1...c6??