Author: Robert Hyatt
Date: 14:59:07 04/13/01
Go up one level in this thread
On April 13, 2001 at 15:27:45, Peter Berger wrote:
>I really like this one ; there are a few engines that can solve it quite fast ,
>a few can't solve it at all .
>
>Black is in serious trouble ; keymove 35. ...Rc5 and draw ! This is really
>brilliant I think ; it's all about understanding that in a rook ending 4 against
>3 pawns on the same wing usually can't win ( at least that's the human
>explanation ) .
>
>[D]2r5/R2nk3/1p1r2pp/1R3p2/1N1P4/2pKP1P1/5P1P/8 b - - bm Rc5
>
>This is taken from a game played in 1 hour/10 secs incr/move on 2 PIII500 , 128
>MB RAM .
>
This is the output from Crafty on a PIII/750 notebook:
12 51.69 1.32 1. ... Ke6 2. Kc2 Rc4 3. Nd3 g5 4.
d5+ Kf6 5. Rxd7 Rxd7 6. Rxb6+ Kg7 7.
Ne5 Rcc7 8. Nxd7 Rxd7
12 1:46 1.01 1. ... Rc5 2. Rxc5 bxc5 3. Nc2 Rc6
4. f3 Kd6 5. Ra3 Nb6 6. e4 cxd4 7.
Nxd4 Nc4 8. Rxc3
12-> 1:56 1.01 1. ... Rc5 2. Rxc5 bxc5 3. Nc2 Rc6
4. f3 Kd6 5. Ra3 Nb6 6. e4 cxd4 7.
Nxd4 Nc4 8. Rxc3
13 2:05 1.00 1. ... Rc5 2. Rxb6 Rxb6 3. dxc5 Rxb4
4. c6 c2 5. Rxd7+ Ke6 6. Kxc2 Rc4+
7. Kd3 Rxc6 8. Rd8 Ke5 9. Ke2
13-> 2:33 1.00 1. ... Rc5 2. Rxb6 Rxb6 3. dxc5 Rxb4
4. c6 c2 5. Rxd7+ Ke6 6. Kxc2 Rc4+
7. Kd3 Rxc6 8. Rd8 Ke5 9. Ke2
14 2:47 0.99 1. ... Rc5 2. Rxb6 Rxb6 3. dxc5 Rxb4
4. c6 c2 5. Rxd7+ Ke6 6. Kxc2 Rc4+
7. Kd3 Rxc6 8. Rd8 g5 9. Re8+ Kf6 10.
Rd8
14-> 3:56 0.99 1. ... Rc5 2. Rxb6 Rxb6 3. dxc5 Rxb4
4. c6 c2 5. Rxd7+ Ke6 6. Kxc2 Rc4+
7. Kd3 Rxc6 8. Rd8 g5 9. Re8+ Kf6 10.
Rd8
15 5:03 1.13 1. ... Rc5 2. Rxc5 bxc5 3. Nc2 Rc6
4. f3 Ke8 5. Ra3 Nb6 6. Rxc3 c4+ 7.
Ke2 Nd5 8. Ra3 Kd7 9. e4 Re6
My quad xeon is about 4x faster on average... so finding this is pretty
quick on good hardware.
>[Event "60 10"]
>[Site "Testgames"]
>[Date "2001.04.13"]
>[Round "1"]
>[White "Gambit Tiger 2.0"]
>[Black "Hiarcs 7.01"]
>[Result "1/2-1/2"]
>[Opening "D38 QGD: Ragozin Variation"]
>
>{}
>1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 5.cxd5 exd5 6.Bg5 h6 7.Bxf6 Qxf6 8.Qb3 Bxc3+
>9.bxc3 c6
>10.e3 b6 11.Bd3 Bf5 12.Bxf5 Qxf5 13.c4 O-O 14.O-O Nd7 15.cxd5 Qxd5 16.Rfc1 Rac8
>17.Rc3
>Qd6 18.Rac1 c5 19.a4 Qc6 20.a5 Rfe8 21.R3c2 Qe6 22.Qxe6 Rxe6 23.axb6 axb6 24.Rb1
>Kf8 25.Kf1
>Ke7 26.Ra2 Rec6 27.Ra6 c4 28.Ne1 f5 29.Ke2 c3 30.Nc2 Rg6 31.g3 Rd6 32.Ra7 g6
>33.Rb5 Re6 34.Kd3
>Rd6 35.Nb4 Rc5 36.Rxb6 Rxb6 37.dxc5 Rxb4 38.c6 c2 39.Rxd7+ Ke6 40.Kxc2 Rc4+
>41.Kd3 Rxc6
>42.Rh7 h5 43.h4 Rb6 44.Ke2 Ke5 45.Kf3 Kf6 46.Rd7 Ke6 47.Rc7 Ke5 48.Ra7 Kf6
>49.Ra8 Rc6 50.Ra2
>Ke5 51.Ra7 Kf6 52.Rd7 Ke5 53.Rd2 Rc4 54.Rb2 Rc6 55.Rb4 Ra6 56.Rc4 Rb6 57.Rc8 Ra6
>58.Re8+
>Kf6 59.Rf8+ Ke5 60.Rb8 Rc6 61.Rd8 Rc5 62.Ra8 Rc6 63.Ra4 Rb6 64.Rc4 Kd5 65.Rc8
>Ke5 66.Rc5+
>Kf6 67.Ra5 Rc6 68.Rb5 Ra6 69.Rd5 Ke6 70.Rd3 Ke5 71.Rb3 Rc6 72.Rb8 Kf6 73.Rb4 Ke5
>74.Rb7
>Kf6 75.Rb1 Ke5 76.Rb5+ Kf6 77.Ra5 Rc4 78.Ra6+ Kf7 79.Rb6 Rc2 80.Rd6 Rc4 81.Rd2
>Kf6 82.Ra2
>Ke7 83.Ke2 Rc6 84.Ra7+ Ke6 85.Ra8 Ke5 86.Ra4 Rc2+ 87.Kf3 Rc6 88.Ra2 Kf6 89.e4
>fxe4+ 90.Kxe4
>Rc4+ 91.Kd3 Rb4 92.f3 Rb1 93.Ra6+ Kf5 94.Ra5+ Kf6 95.Ke4 Rb4+ 96.Kd5 Rb3 97.Ra8
>Kg7 98.Ke4
>Rb4+ 99.Ke3 Rb3+ 100.Ke2 Rb2+ 101.Kf1 Kf7 102.Ra6 Rd2 103.Rc6 Ra2 104.Rb6 Rd2
>105.Ra6
>Rc2 106.Rd6 Rb2 107.f4 Rc2 108.Rd5 Kf6 109.Ke1 Rg2 110.Rg5 Kf7 111.Kf1 Rd2
>112.f5 gxf5
>113.Rxh5 Kf6 114.Rg5 Ra2 115.Rg8 Kf7 116.Rb8 f4 117.g4 Rh2 118.Rb7+ Kg8 119.h5
>Rh4 120.Kg2
>Rxg4+ 121.Kh3 Rg5 122.Kh4 Rf5 123.Kg4 Rf7 124.Rb8+ Rf8 125.Rb2 f3 126.Rf2 Kh7
>127.Rxf3
>Rxf3 128.Kxf3 Kh8 129.Kf4 Kg8 130.h6 Kh8 131.Kf5 Kg8 132.Kg6 Kh8 133.Kf6 Kg8
>134.Kf5 Kh8
>135.Kg6 Kg8 136.Kf6 Kh8 137.Kg5 Kg8 138.Kg4 Kh8 139.Kh4 Kg8 140.Kg5 Kh8 141.Kg4
>Kg8 142.Kh4
>Kh8 143.Kh5 Kg8 144.Kg4 Kh8 145.Kf4 Kg8 146.Kf5 Kh8 147.h7 Kxh7 148.Ke4 1/2-1/2
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