Author: Sune Larsson
Date: 11:22:25 12/27/01
Go up one level in this thread
On December 27, 2001 at 13:17:11, Miguel A. Ballicora wrote: >On December 27, 2001 at 11:13:40, Sune Larsson wrote: > >> >> [D]8/3k2p1/4pp2/1p2PP2/1PpP2P1/8/4K3/8 w - - 0 35 >> >> This position is from a game Rocha - Spraggett, 1999. >> White is worse here and there are several ways for him to >> lose this position. Hecht, in his commentaries, even thought >> that the key move is the only way for white to make the draw. >> This ending is tricky, so I'm not 100% sure that Hecht is correct. > >I think he is correct. Black threats 1.. fxe5 2. dxe5 exf5 3. gxf5 and now >the plan is simple, Ke7-Kf7 and then g5! Yes, I played through some variations like yours above, starting with 1.Kf3 Ke7 but got stuck in drawn positions. That's why I wrote "not 100% sure." Else it would have been just a matter of time til Dieter would show up with a humble question like: "How does black win after 1.Kf3? Yace...;-) Following your line above I get: 1.Kf3 fxe5 2.dxe5 exf5 3.gxf5 Ke7 4.Ke3 Kf7 5.Ke4 g5 and now 6.fxg6+ Kxg6 7.Kf4 Kf7 8.Ke3 is a draw! Black can give his c-pawn, get the e-pawn and then win the white b-pawn. But it's still a draw then. So, right now, I don't know how to win this for black if white just moves his king to f3,e3,e4. Sune >My program Gaviota has not clue in this position (I'd be surprised if it has >any). This is a great position and I will keep it for teaching gaviota how to >play pawn endgames. Thanks! > >Miguel > > >> Anyway, white has a simple and straight forward way to secure the draw. >> >> Theme - pawn ending: One protected passer can hold his own vs two connected. >> >> >> Test: Programs with some of this knowledge should evaluate the position >> after 1.d5! as 0.00 or close to it. >> >> >>[Event "Boavista Masters"] >>[Site "Porto"] >>[Date "1999.12.31"] >>[Round "5"] >>[White "Rocha, Sergio"] >>[Black "Spraggett, Kevin"] >>[Result "1/2-1/2"] >>[ECO "C02"] >>[WhiteElo "2427"] >>[BlackElo "2521"] >>[Annotator "Hecht"] >>[SetUp "1"] >>[FEN "8/3k2p1/4pp2/1p2PP2/1PpP2P1/8/4K3/8 w - - 0 35"] >>[PlyCount "12"] >>[EventDate "1999.12.27"] >> >>35. d5 $1 exd5 36. e6+ Ke7 37. Ke3 c3 38. Kd3 d4 39. Kc2 g5 40. Kd3 Kd6 1/2-1/2 >> >>Sune
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