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Subject: Re: Endgame study

Author: Dieter Buerssner

Date: 02:05:55 04/02/05

Go up one level in this thread


On March 31, 2005 at 11:21:10, Mihaly Szalai wrote:

>I think this is a very good engine test.
>Try to avoid Rh1+ (leads to a draw) and find Rg1!
>
>J. Fleck - Ch. Lutz
>
>8/7r/1pp4P/8/1P1K4/7k/8/R7 w - - 0 1
>
>1. Rg1! (1. Rh1+? Kg2 2. Rh5 c5+ 3. bxc5 bxc5+ 4. Ke5 Kf3 5. Kf6 Ke3=) 1... c5+
>(
>1... Kh4 2. Ke4 Rxh6 3. Ke5 c5 4. b5 c4 5. Rh1+ Kg5 6. Rxh6 Kxh6 7. Kd4+-) 2.
>bxc5 bxc5+ 3. Ke5 c4 4. Kf5 Kh2 5. Rg6 Rc7 6. Rg7 Rc5+ 7. Kg4 c3 8. h7 Rc4+ 9.
>Kg5 Rc5+ 10. Kh6 c2 11. h8=Q c1=Q+ 12. Kg6+ Kg3 13. Kf6++-

Yace, first with 6-men TBs (only relevant one I have is krpkrp), then 3-4-5 men,
then without TBs. The position looks, like the krpkrp TB might be rather
helpful. But the search is slowed too much down. My HD is rather fast (for IDE),
also there was enough free memory for a decent OS cache size. With only 3-4-5
men TBs it is faster, without any TBs, it is fastest by a huge margin. Hmmmm
....


Engine: Yace aktuell (200 MB)
3/4/5 some 6 men TBs

7/17   0:01   +0.56    1.Tg1 c5+ 2.Kc4 cxb4 3.Tg6 b3 4.Kxb3 b5 (147.979) 80

8/17   0:02   +0.16--  1.Tg1 Kh4 2.Tg6 c5+ 3.Kc3 cxb4+
                       4.Kxb4 Kh5 5.Tc6 Txh6 6.Tc7 (216.054) 91

8/18   0:02   0.00     1.Tg1 Kh4 2.Tg6 c5+ 3.Kc3 cxb4+
                       4.Kxb4 Kh5 5.Tc6 Txh6 6.Txh6+ Kxh6
                       7.Kc4 b5+ 8.Kd4 b4 9.Ke4 b3 10.Kd3 b2
                       11.Kc2 b1D+ 12.Kxb1 (229.796) 94

8/19   0:03   +0.01++  1.Ke5 Kg4 2.Tg1+ Kh5 3.Kf6 c5 4.bxc5 Te7 (342.465) 105

8.07   0:03   +0.08    1.Ke5 Kg2 2.Ta6 Txh6 3.Txb6 Kf3
                       4.Ta6 Th5+ 5.Kd6 Tb5 (387.052) 103

...
9/19   0:05   +0.06++  1.Th1+ Kg4 2.Ke5 Kg5 3.Tg1+ Kh4
                       4.Tg6 Kh5 5.Txc6 Te7+ 6.Kd6 b5 (563.814) 97

9.03   0:05   +0.48++  1.Th1+ Kg4 2.Ke5 Kg5 3.Tg1+ Kh4
                       4.Tg6 Kh5 5.Txc6 Td7 (577.879) 98

9/19   0:06   +0.48    1.Th1+ Kg2 2.Th5 Kf3 3.Ke5 c5 4.bxc5 Txh6
                       5.Txh6 Kg4 (644.708) 100

...

14/28  1:40   0.00     1.Ke5 Kg2 2.Ta6 Txh6 3.Txb6 Th4
                       4.Kd6 Tc4 5.Tb7 Kg3 6.Tg7+ Kf4 7.Te7 Txb4
                       8.Kxc6 Tc4+ 9.Kd6 Td4+ 10.Ke6 Te4+
                       11.Kf6 Txe7 12.Kxe7 (13.256.622) 132

14/28  1:43   +0.01++  1.Th1+ Kg2 2.Th5 c5+ 3.bxc5 bxc5+
                       4.Ke4 c4 (13.964.647) 135

14/31  1:51   +0.08    1.Th1+ Kg2 2.Th5 c5+ 3.bxc5 bxc5+
                       4.Ke5 c4 5.Kf5 c3 6.Kg6 Tc7 7.h7 Tc6+
                       8.Kf7 Tc7+ 9.Ke6 c2 10.h8D c1D
                       11.Th2+ Kf3 12.Df6+ Ke4 13.Tf2 (16.307.293) 146

14/31  2:25   +0.08    1.Th1+ Kg2 2.Th5 c5+ 3.bxc5 bxc5+
                       4.Ke5 c4 5.Kf5 c3 6.Kg6 Tc7 7.h7 Tc6+
                       8.Kf7 Tc7+ 9.Ke6 c2 10.h8D c1D
                       11.Th2+ Kf3 12.Df6+ Ke4 13.Tf2 (21.306.280) 146

15/32  2:41   +0.07    1.Th1+ Kg2 2.Th5 c5+ 3.bxc5 bxc5+
                       4.Ke5 c4 5.Kf5 Kf3 6.Th3+ Ke2 7.Ke4 Kf2
                       8.Kd4 Kg2 9.Th4 c3 10.Kd3 c2 11.Kc4 (24.933.803) 154

15/32  3:15   +0.08++  1.Tg1 Kh4 2.Ke4 Txh6 3.Ke5 b5 (29.158.735) 148

15/34  3:32   +0.48++  1.Tg1 Kh4 2.Ke4 Th8 3.Kf5 b5 (32.525.727) 152

15/34  4:00   +0.55    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc6 7.Kg5 Tc5+
                       8.Kg4 Tc6 9.h7 Th6 10.Kf3 c3 11.Tg2+ Kh1
                       12.Tg3 (41.503.935) 172

15/34  5:02   +0.55    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc6 7.Kg5 Tc5+
                       8.Kg4 Tc6 9.h7 Th6 10.Kf3 c3 11.Tg2+ Kh1
                       12.Tg3 (50.645.083) 167

16/34  5:40   +0.72    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 c3
                       8.h7 Tc4+ 9.Kf5 Tc5+ 10.Ke4 Th5
                       11.Kd3 Th4 12.Kxc3 Tf4 (59.551.205) 174

16/34  7:26   +0.72    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 c3
                       8.h7 Tc4+ 9.Kf5 Tc5+ 10.Ke4 Th5
                       11.Kd3 Th4 12.Kxc3 Tf4 (74.880.283) 167

17/37  8:33   +0.69    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 c3
                       8.h7 Tc4+ 9.Kf5 Tc5+ 10.Ke4 Th5
                       11.Kd3 Th3+ 12.Kc2 Kh1 13.Tc7 Kg2 (89.752.835) 174

17/39  12:29  +0.69    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 c3
                       8.h7 Tc4+ 9.Kf5 Tc5+ 10.Ke4 Th5
                       11.Kd3 Th3+ 12.Kc2 Kh1 13.Tc7 Kg2 (136.486.011) 182

18/39  17:23  +0.70    1.Tg1 c5+ 2.Ke5 cxb4 3.Kf5 Kh2 4.Kg6 Kxg1
                       5.Kf5 (191.909.053) 183

18/40  25:42  +0.70    1.Tg1 c5+ 2.Ke5 cxb4 3.Kf5 Kh2 4.Kg6 Kxg1
                       5.Kf5 (258.144.285) 167

19/42  34:43  +0.78    1.Tg1 c5+ 2.Ke5 cxb4 3.Kf5 Kh2 4.Tg6 Tb7
                       5.Tg5 b3 6.Kg6 b2 7.Tb5 b1D+ 8.Txb1 b5
                       9.h7 Tb6+ 10.Kg5 Tb8 11.Tb3 (351.916.423) 168

19/44  49:52  +0.78    1.Tg1 c5+ 2.Ke5 cxb4 3.Kf5 Kh2 4.Tg6 Tb7
                       5.Tg5 b3 6.Kg6 b2 7.Tb5 b1D+ 8.Txb1 b5
                       9.h7 Tb6+ 10.Kg5 Tb8 11.Tb3 (498.637.436) 166

20/44  59:25  +1.18++  1.Tg1 c5+ 2.Ke5 cxb4 3.Kf5 Kh2 4.Tg6 Tb7
                       5.Tg7 Tb8 6.h7 Th8 7.Kg6 b3 8.Tb7 b2
                       9.Txb6 Te8 (628.553.561) 176

20/44  74:37  +1.76    1.Tg1 c5+ 2.Ke5 cxb4 3.Kf5 Kh2 4.Tg6 Tf7+
                       5.Kg5 b5 6.Tb6 b3 7.Txb5 Tf3 8.h7 Tg3+
                       9.Kf6 Th3 10.Kg6 Tg3+ 11.Tg5 Th3
                       12.Kg7 b2 13.Tb5 Tg3+ 14.Kf6 (839.354.240) 187

20/48  102:45 +1.76    1.Tg1 c5+ 2.Ke5 cxb4 3.Kf5 Kh2 4.Tg6 Tf7+
                       5.Kg5 b5 6.Tb6 b3 7.Txb5 Tf3 8.h7 Tg3+
                       9.Kf6 Th3 10.Kg6 Tg3+ 11.Tg5 Th3
                       12.Kg7 b2 13.Tb5 Tg3+ 14.Kf6 (1.178.870.830) 191

21/48  130:32 +1.78    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 Tb5
                       8.h7 c3 (1.672.293.603) 213

21/50  184:10 +1.78    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 Tb5
                       8.h7 c3 (2.465.706.362) 223

22/50  210:52 +2.18++  1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 c3
                       8.h7 Tc4+ 9.Kg5 Tc5+ 10.Kh6 c2
                       11.h8D c1D+ 12.Kg6+ Kg1 13.Kf6+ Kf2
                       14.Dh2+ (2.851.203.098) 225

22/50  249:28 +3.18++  1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 c3
                       8.h7 Tc4+ 9.Kg5 Tc5+ 10.Kh6 Tc4
                       11.Tc7 Th4+ 12.Kg6 Tg4+ 13.Kf6 Th4
                       14.Kg7 (3.376.231.085) 225

22/50  320:22 +5.40    1.Tg1 Kh4 2.Ke4 Kh3 3.Kf5 Kh2 4.Tg6 Th8
                       5.Tf6 Kg3 6.Kg6 Tb8 7.h7 Kg4 8.Kg7 Kg5
                       9.Tf8 Tb7+ 10.Kg8 Txh7 11.Kxh7 b5
                       12.Kg7 c5 13.bxc5 (137.284.152) 7

22/50  424:22 +5.40    1.Tg1 Kh4 2.Ke4 Kh3 3.Kf5 Kh2 4.Tg6 Th8
                       5.Tf6 Kg3 6.Kg6 Tb8 7.h7 Kg4 8.Kg7 Kg5
                       9.Tf8 Tb7+ 10.Kg8 Txh7 11.Kxh7 b5
                       12.Kg7 c5 13.bxc5 (1.481.082.310) 58

23/52  524:36 +5.80++  1.Tg1 Kh4 2.Ke4 Kh3 3.Kf5 Kh2 4.Tg6 Th8
                       5.Tf6 Kg3 6.Kg6 Tb8 7.h7 Kg4 8.Kg7 Kg5
                       9.Tf8 Kh5 10.h8D+ Kg5 (2.775.836.305) 88

Engine: Yace aktuell (200 MB)
3/4/5 men


15/33  1:37   +0.03    1.Th1+ Kg2 2.Th5 c5+ 3.bxc5 bxc5+
                       4.Ke5 c4 5.Kf5 Kf2 6.Kf4 c3 7.Th2+ Kg1
                       8.Kg3 Kf1 9.Kf3 Kg1 10.Tg2+ Kh1
                       11.Tg6 c2 12.Tc6 (25.470.609) 260

15/33  1:59   +0.04++  1.Tg1 Kh4 2.Tg6 c5+ 3.bxc5 bxc5+
                       4.Ke5 Te7+ 5.Kf5 Kh5 6.Tg7 Kh4 (30.247.818) 254

15/33  2:15   +0.48++  1.Tg1 Kh4 2.Ke4 c5 3.bxc5 bxc5 4.Kf5 Tf7+
                       5.Kg6 Te7 (35.372.646) 261

15/35  2:35   +0.62    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg6 Tc6+
                       8.Kg5 Tc5+ 9.Kg4 Tc6 10.h7 Th6
                       11.Tc7 Th3 12.Te7 (43.470.846) 280

15/35  3:25   +0.62    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg6 Tc6+
                       8.Kg5 Tc5+ 9.Kg4 Tc6 10.h7 Th6
                       11.Tc7 Th3 12.Te7 (54.028.995) 262

16/36  4:15   +0.62    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg6 Tc6+
                       8.Kg5 Tc5+ 9.Kg4 Tc6 10.h7 Th6
                       11.Tc7 c3 12.Kf3 Th3+ 13.Ke2 Kg2 (69.374.215) 271



8/7r/1pp4P/8/1P1K4/7k/8/R7 w - -

Engine: Yace aktuell (200 MB)
von Dieter Buerssner

14/30  0:14   +0.06    1.Th1+ Kg2 2.Th5 c5+ 3.bxc5 bxc5+
                       4.Ke4 c4 5.Tg5+ Kh3 6.Tg6 c3 7.Kf4 Kh4
                       8.Tg1 Tf7+ 9.Ke4 Th7 10.Kf5 c2
                       11.Tg4+ Kh5 12.Ke4 (14.076.417) 960

14/30  0:16   +0.07++  1.Ta6 c5+ 2.bxc5 bxc5+ 3.Ke5 Kg4
                       4.Tg6+ Kh5 5.Tg1 Tb7 6.Tg7 Tb5 7.h7 c4+
                       8.Kd6 Tb6+ 9.Ke7 Tb7+ 10.Kf6 Txg7
                       11.h8D+ Kg4 (16.241.970) 966

14/30  0:18   +0.13    1.Ta6 c5+ 2.bxc5 bxc5+ 3.Ke5 Kh4
                       4.Tg6 Th8 5.Kf6 Th7 (17.988.773) 972

14/30  0:20   +0.14++  1.Tg1 Kh4 2.Ke4 c5 3.bxc5 Th8 (19.757.714) 971

14/30  0:23   +0.55    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 Kh2
                       4.Tg6 c4 5.Tc6 c3 6.Kf5 Th8 7.Kg6 Tg8+
                       8.Kf6 Tg3 9.h7 Tf3+ 10.Ke5 Te3+
                       11.Kd5 (22.409.150) 971

14/30  0:30   +0.55    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 Kh2
                       4.Tg6 c4 5.Tc6 c3 6.Kf5 Th8 7.Kg6 Tg8+
                       8.Kf6 Tg3 9.h7 Tf3+ 10.Ke5 Te3+
                       11.Kd5 (29.065.646) 968

15/31  0:36   +0.71    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Ke4 Th5
                       8.h7 Th3 9.Kd4 c3 10.Tc7 Kg2 (34.810.800) 964

15/32  0:46   +0.71    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Ke4 Th5
                       8.h7 Th3 9.Kd4 c3 10.Tc7 Kg2 (44.472.316) 963

16/33  0:57   +0.64    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 Tc6
                       8.h7 (54.066.602) 932

16/36  1:39   +0.64    1.Tg1 c5+ 2.bxc5 bxc5+ 3.Ke5 c4
                       4.Kf5 Kh2 5.Tg6 Tc7 6.Tg7 Tc5+ 7.Kg4 Tc6
                       8.h7 (90.952.300) 910


Regards,
Dieter



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