Author: Sune Larsson
Date: 14:28:34 12/27/01
Go up one level in this thread
On December 27, 2001 at 16:20:08, Miguel A. Ballicora wrote: >On December 27, 2001 at 14:22:25, Sune Larsson wrote: > >>On December 27, 2001 at 13:17:11, Miguel A. Ballicora wrote: >> >>>On December 27, 2001 at 11:13:40, Sune Larsson wrote: >>> >>>> >>>> 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. > >Ok, you went farther than me. Anyway, I still think that black wins but I cannot >check it now. If black king reaches f5 (I am pretty sure that can be forced) >White king is forced to d5 and black promotes first, going to and Q-endgame >with an extrapawn after Qc4+. Easy to check with table bases but look like a win >because of the position of the kings. >This is plan to check, not a solution. > >If this does not work, you might be right and it is a draw. >Regards, >Miguel Black's Ke6 is always met by Ke4 - as black's Kg6 is always met by Kf4. So it's not easy for black to get his king to f5. But say he manages. That would lead to the position you refered to above: [D]4Q3/8/3K4/1p3k2/1q6/8/8/8 w - - 0 1 And this is a TB-draw. 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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