Author: Ernst Walet
Date: 13:58:01 11/29/01
Go up one level in this thread
This is what Fritz 7.002 does.
Ernst.
New position
8/5p2/6p1/ppk1b3/4K1Pp/1P3P1P/P3N3/8 b - - 0 1
Analysis by Fritz 7:
1...Bg7 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 Bb2 5.g5 f6 6.gxf6 Bxf6 7.f4
³ (-0.44) Depth: 11/22 00:00:00 224kN
1...Bb2!
³ (-0.47) Depth: 11/22 00:00:00 298kN
1...Bb2! 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 b4 5.g5 f6 6.f4
³ (-0.57) Depth: 11/22 00:00:00 340kN
1...Bb2 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 b4 5.g5 f6 6.f4 fxg5 7.fxg5 Be5
³ (-0.60) Depth: 12/22 00:00:00 471kN
1...Bb2 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 Be5 5.Nc1 b4 6.Nd3 Bc3 7.g5 f6
³ (-0.54) Depth: 13/23 00:00:01 875kN
1...Bb2 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 Be5 5.f4 Bg7 6.Ng1 f5 7.gxf5 gxf5 8.Nf3 Bf6
³ (-0.50) Depth: 14/24 00:00:02 1642kN
1...Bb2 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 g5 5.f4 f6 6.Ng1 gxf4 7.Nf3 Bc3 8.Nxh4 b4
³ (-0.41) Depth: 15/28 00:00:05 3627kN
1...Bb2 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 Bf6 5.Nf4 a4 6.bxa4 Kxa4 7.Nd5 Bd4 8.f4 b4
³ (-0.29) Depth: 16/27 00:00:17 11136kN
1...Bg7!
³ (-0.32) Depth: 16/28 00:00:19 12422kN
1...Bg7! 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 a4 5.bxa4 Kxa4 6.g5
³ (-0.35) Depth: 16/28 00:00:21 13590kN
1...Bg7 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 a4 5.bxa4 Kxa4 6.g5 b4 7.Nf4 Ka3 8.Nd5 Be5
= (-0.25) Depth: 17/29 00:00:42 27533kN
1...Bg7 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 a4 5.bxa4 Kxa4 6.Nf4 b4 7.Ng2 Bf6 8.f4 g5
³ (-0.50) Depth: 18/31 00:01:27 55174kN, tb=1
1...Bg7 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 a4 5.bxa4 Kxa4 6.Nf4 b4 7.Kc2 Ka3 8.Nd5 Bf8
³ (-0.44) Depth: 19/33 00:02:07 80287kN, tb=5
1...Bg7 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 a4 5.bxa4 Kxa4 6.Nf4 b4 7.Kc2 Ka3 8.Nd5 Bf8
³ (-0.38) Depth: 20/34 00:03:33 135703kN, tb=48
1...Bg7 2.Kd3 Kb4 3.Kc2 Ka3 4.Kb1 a4 5.bxa4 Kxa4 6.Kc2 Ka3 7.Nc3 b4 8.Nd5 Bf8
³ (-0.38) Depth: 21/36 00:07:12 276650kN, tb=175
(Celeron Tualatin 1,2 GHz, 833MB hash, 3, 4 and 5 piece EGTB's 29.11.2001)
On November 29, 2001 at 16:39:45, Sune Larsson wrote:
>
> [D]8/5p2/6p1/ppk1b3/4K1Pp/1P3P1P/P3N3/8 b - - 0 1
>
> Lesiege 2530 - Andersson 2630, Elista 1998
>
>
> An ending bishop vs knight. Pawns on both wings and black wins it.
> First mission: Keep the white king tied up. Key square for the black
> king is c4.
>
>
> Test: Black to move and wins.
>
>
>[Event "Elista"]
>[Site "?"]
>[Date "1998.??.??"]
>[Round "?"]
>[White "Lesiege, Alexandre"]
>[Black "Andersson, Ulf"]
>[Result "0-1"]
>[WhiteElo "2530"]
>[BlackElo "2630"]
>[Annotator "Larsson"]
>[SetUp "1"]
>[FEN "8/5p2/6p1/ppk1b3/4K1Pp/1P3P1P/P3N3/8 b - - 0 1"]
>[PlyCount "29"]
>[EventDate "1998.10.15"]
>
>{Black's advantage consists of having bishop vs knight. It's important that
>there are pawns on both wings. The first step is to make a standstill for
>white's king.} 1... Bg7 2. Kd3 Kb4 3. Kc2 Ka3 4. Kb1 {
>The white king is now passive. The key square for black is c4.} 4... a4 $1 5.
>bxa4 bxa4 6. Nf4 Kb4 7. Kc2 Kc4 8. Ne2 Be5 $1 {
>The problem for white is that he cannot create active counterplay.} 9. Kd2 Bc7
>10. Kc2 Ba5 {Controls the important square d2. White is short of moves.} 11. f4
>{White is lost. After 11.Nc1, black can enter the position with 11.-Kd4
>followed by 12.-Ke3. Equally bad is 11.Kd1 Kd3. Black's king now gets the
>square e4.} 11... Bb4 12. Ng1 Kd4 13. Nf3+ Ke4 14. Ng5+ Kxf4 15. Nxf7 Kg3 {
>After 16.Ng5 black wins with 16.-Be7. No hope for 16.Ne5 g5 17.Nf7 Be7.} 0-1
>
>Sune
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