Author: Enrique Irazoqui
Date: 06:13:36 05/01/99
Go up one level in this thread
On May 01, 1999 at 04:56:05, Jeremiah Penery wrote:
>On April 30, 1999 at 18:38:28, Enrique Irazoqui wrote:
>
>>Can someone check the 5 positions below? I like them quite a lot and I have not
>>seen them solved by any program I tried.
>
>I will let these all run longer to resolve the fail-highs and try to find the
>win (draw?) for all of them.
>
>>8/2pp1p2/1p6/1kPP4/5Pp1/8/6PP/5K2 w - - 0 1
>>{'Fritz 5.32-192MB/PentiumII-400/256' >900s} 1. c6 $3 (1. h4 $2 gxh3 2. gxh3 (
>
>Does this mean that either c6 or h4 are acceptable solutions?
c6 is the only solution.
>My latest modification of Crafty finds this in tournament time:
My Crafty 16.6 doesn't.
>------------------
>16-> 2:24 -1.56 1. c61 (The 1 on the end is an output bug)
>17 2:45 -1.93 1. c6 d6 2. h4 gxh3 3. gxh3 Kc5 4.
> Ke2 Kxd5 5. h4 Ke6 6. h5 Kf6 7. Ke3
> Kg7 8. Kf3 Kh6 9. Kg4 d5
>17-> 3:17 -1.93 1. c6 d6 2. h4 gxh3 3. gxh3 Kc5 4.
> Ke2 Kxd5 5. h4 Ke6 6. h5 Kf6 7. Ke3
> Kg7 8. Kf3 Kh6 9. Kg4 d5
>18 3:50 -2.12 1. c6 dxc6 2. h4 gxh3 3. gxh3 Kc5 4.
> dxc6 Kxc6 5. Ke2 Kd5 6. h4 b5 7. h5
> Ke6 8. Ke3 Kf5 9. Kf3 Kf6 10. Ke4 b4
>
>The score improves to -1.75 at ply 19, still under 10 minutes.
>
>>8/1k4p1/3pP3/pP5P/8/8/1r5P/3K4 w - - 0 1
>>1. h6 $1 gxh6 2. e7 Rb1+ 3. Kd2 Rb2+ 4. Kd3 Rb3+ 5. Kd4 Rb4+ 6. Kd5 Rxb5+ 7.
>
>Would play the move in 3 minutes, but did not resolve the fail-high in under 20
>minutes, so I went on to the next position.
What kind of computer are you using? I am running Crafty 16.6 for Fritz on a
PII-400 with 256 MB RAM and it is much slower than yours.
Troitzky,A - [+0300.43d1b7]
8/1k4p1/3pP3/pP5P/8/8/1r5P/3K4 w - - 0 1
Analysis by Crafty 16.6, PII-400 256MB:
1.h4 Rxb5
-+ (-5.83) depth: 1 00:00:00 1189kN
1.e7 Rb1+ 2.Kd2 Rb2+ 3.Kd3 Rb3+ 4.Kd4 Rb4+ 5.Kd5 Rxb5+ 6.Kxd6 Rb6+ 7.Kd5 Rb5+
8.Kd6
-+ (-5.43) depth: 1 00:00:00 1189kN
= (0.00) depth: 18 00:02:30 42872kN
1.h6
² (0.40) depth: 18 00:11:53 194750kN
² (0.40) depth: 18 00:11:53 194750kN
(, 1/05/99)
Enrique
>>4R3/P7/2bB2p1/r3pk2/2p2p1P/2P2P1K/6P1/8 w - - 0 54
>>54. Rxe5+ $1 Rxe5 55. Bxe5 Kxe5 (55... Bb7 56. Bc7 Bc6 {and Black has no
>
>This ran a while, but was not found.
>
>>8/3kP3/3br1P1/6P1/7K/8/8/7B w - - 0 1
>>1. Bc6+ $1 Kxe7 2. Bd5 (2. g7 Rg6 3. Bd5 Rxg7 4. Kh5 Kf8 $19) 2... Rxg6 3. Kh5
>
>This was not found in 3 hours.
>
>>6k1/6p1/7p/1P1P4/4q3/1r5P/6P1/3R1Q1K w - - 0 1
>>1. d6 {'!!'} 1... Rxh3+ 2. Kg1 Qe3+ {'[]'} 3. Qf2 Rh1+ 4. Kxh1 Qxf2 {Q 2/m4} 5.
>
>Fails high on d6 in about 12 minutes (depth 12). I didn't wait for it to
>resolve, however.
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