Two Upsets from USATE 2007
Tom Bartell (2380) - Leonid Yudasin (2569)
USATE 2007/Parsippany, NJ USA 2007
The following position arises after 35... Qe5??
Yudasin thinks he is setting up a killer "cross-pin," in which the Bishop at e3 is at the cross-fire of two pins along the g1-d4 diagonal and the e-file. But White pulls off a stunning reversal, after which he can say "who's cross-pinning whom?"
and Black resigned in view of the hopeless Exchange-down ending that follows.
Arthur Shen (1605) - D. Gertler (2250) [B00]
US Amateur Team East/Parsippany USA (6) 2007
An interesting choice against a lower-rated player.
Though it s eems wrong to exchange White's "Good Bishop" for Black's "Bad Bishop," the truth is that White's light-squared Bishop has little role in this position and the exchange helps him to deploy his forces more favorably.
This way of exchanging seems to help Black more than it helps White. Better to wait for Black to exchange.
Tamburro writes: "Shen is tactically alert on moves 14 and 15 and wins a piece. It just goes to show that no matter who you are playing, they make mistakes, too, and you have to pay attention to tactical threats on every single move."
Black has two pawns for the piece and the superior pawn structure, but that should prove insufficient against best play.
Threatening the pawn at c7 and to trap the Rook by Bg3, hence Black's next.
Exploiting the pin on the d-pawn.
On 26... d4! White may have been planning 27. Nxd4!? (27. Bxe7 Rxe7 28. Rxe7+ Kxe7 29. Nd2 Rf8 30. f3) 27... cxd4 28. Rxd4+ Ke8 29. Rde4 Rc8+ 30. Kb2 Rc7 31. Re6! Kf8 32. Bf6! Rd7 33. Kb3! when White gains just the advantage he needs to win the King and Pawn ending after 33... h5 (what else?) 34. Rxe7 Rfxe7 35. Bxe7+ Rxe7 36. Rxe7 Kxe7 37. Kc4 a6 38. Kd5
27... Rg8! 28. Bf4 d4 29. Nd2 Nd6 30. Bg3 Re7?! 31. Rxe7+ Kxe7 32. Re1+ Kd7 33. Ne4 Ne8 34. f4 Rf8 35. Ng5 h6 36. Nf3 Ng7 37. Nh4 Rf7 38. Re5 Kc6 39. Ng6 Kd6 40. f5 Kd7 41. f6 Ne6 42. Rd5+ Ke8 43. Bh4 Ng5 44. Bxg5 hxg5 45. Rf5?
and Black resigned (or perhaps lost on time.) Best was 45. Rd6!
1 - 0
However, as Pete Tamburro rightly points out, the position is far from clear and certainly not an easy win after:
Probably the best winning try now is:
though it leads to a problem-like win at best after even the most direct line :
going after the h-pawn.
and White appears to have good winning chances, but it is definitely worth playing out!1-0
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