Author: John Merlino
Date: 15:38:28 04/11/02
Go up one level in this thread
On April 11, 2002 at 16:56:50, Dieter Buerssner wrote:
>On April 11, 2002 at 15:35:06, Art Basham wrote:
>
>>White plays 1. Nd8 and mates in 12...!
>>
>>[D]6n1/1N4p1/6Pp/1B1NpP2/P2kP3/1p3PpK/2P4P/rb2b3 w - -
>
>I (and my engine) like this more, than other "Mate in ..." positions posted
>recently. Often the positions were like: The engine can see, that this is an
>easy win. Here, it seems not that trivial to win. So, I believe, this is more
>suited to test "playing" programs.
>
>Yace, K6-2 475, 20M hash (run in the background with perhaps 60% of the CPU)
>
> 1122228 11.205 0.00 9. 1. Nd8 Kc5 2. Nb7+ Kd4 {-350}
> 1281204 13.096 0.40 10++ 1. Nd8 Kc5 2. Ne6+ Kd6 3. c4 Bf2 4. c5+ Bxc5 5.
> Nd8 Bxe4 6. fxe4 Rxa4 7. Bxa4 Bd4 {260}
> 1747861 17.979 0.67 10t 1. Nd8 Kc5 2. Ne6+ Kd6 3. c4 Bxe4 4. fxe4 Rc1
> 5. Nd8 Kc5 6. hxg3 b2 7. Ne6+ Kd6 8. c5+ Rxc5
> 9. Nxc5 Kxc5 10. Bd3 {80}
> 2485208 25.704 0.67 10. 1. Nd8 Kc5 2. Ne6+ Kd6 3. c4 Bxe4 4. fxe4 Rc1
> 5. Nd8 Kc5 6. hxg3 b2 7. Ne6+ Kd6 8. c5+ Rxc5
> 9. Nxc5 Kxc5 10. Bd3 {80}
> 3619387 38.411 1.02 11t 1. Nd8 Kc5 2. Ne6+ Kd6 3. Nb6 Ke7 4. c4 Bxe4 5.
> fxe4 Rd1 6. Nd5+ Rxd5 7. cxd5 gxh2 8. Kxh2 b2
> 9. Bd3 Kf6 {80}
> 5813363 1:05.0 1.02 11. 1. Nd8 Kc5 2. Ne6+ Kd6 3. Nb6 Ke7 4. c4 Bxe4 5.
> fxe4 Rd1 6. Nd5+ Rxd5 7. cxd5 gxh2 8. Kxh2 b2
> 9. Bd3 Kf6 {80}
> 9096128 1:38.7 1.11 12t 1. Nd8 Kc5 2. Ne6+ Kd6 3. Nb6 Ke7 4. c4 Bxe4 5.
> fxe4 Rd1 6. Nd5+ Rxd5 7. cxd5 gxh2 8. Kxh2 b2
> 9. Bd3 Kf6 10. Bb1 {80}
> 15251052 2:50.7 1.11 12. 1. Nd8 Kc5 2. Ne6+ Kd6 3. Nb6 Ke7 4. c4 Bxe4 5.
> fxe4 Rd1 6. Nd5+ Rxd5 7. cxd5 gxh2 8. Kxh2 b2
> 9. Bd3 Kf6 10. Bb1 {80}
> 16037776 3:01.8 1.51 13++ 1. Nd8 Kc5 2. Ne6+ Kd6 3. Nb6 Ke7 4. hxg3 Rxa4
> 5. Nc8+ Kf6 6. Bxa4 bxc2 7. Bxc2 Ne7 8. Nxe7
> Bxc2 9. Nc6 Bd2
> 16827342 3:11.1 Mat12 13++ 1. Nd8 Kc5 2. Ne6+ Kd6 3. Nb6 Ke7 4. Nc8+ Kf6
> 5. Nf8 Kg5 6. hxg3 Bxg3 7. Ne6+ Kf6 8. Nb6 Ke7
> 9. Nd5+ Kd6H 10. Nd8H {HT} {-350}
> 25092067 4:07.0 Mat12 13t 1. Nd8 Kc5 2. Ne6+ Kd6 3. Nb6 Ke7 4. Nc8+ Kf6
> 5. Nf8 Kg5 6. hxg3 Bxg3 7. Ne6+ Kf6 8. Nb6 Ke7
> 9. Nd5+ Kd6 10. Nd8 Kc5 11. Nb7+ Kd4 12. c3#
> {-350}
>
>Soon John Merlino will come and show a few seconds for CM :-)
>
>Regards,
>Dieter
Hate to disappoint you guys, but CM doesn't see it! It just can't find 4.Nc8+.
This is on a PIII-600, default personality, 32MB hash:
Time Depth Score Positions Moves
0:00 1/3 0.00 610 1.Nd8 Kc5 2.Nb7+ Kd4
0:00 1/4 0.00 1970 1.Nd8 Kc5 2.Nb7+ Kd4
0:00 2/5 0.00 5749 1.Nd8 Kc5 2.Nb7+ Kd4
0:00 2/6 0.00 12436 1.Nd8 Kc5 2.Nb7+ Kd4
0:00 3/7 0.00 31205 1.Nd8 Kc5 2.Nb7+ Kd4
0:02 4/8 0.13 138861 1.Nd8 Kc5 2.Ne6+ Kd6 3.c4 Bxe4
4.fxe4 Rc1 5.c5+ Rxc5 6.Nxg7 Rc2
7.Ne8+ Kc5 8.hxg3
0:10 5/9 0.08 656683 1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
4.c4 Bxe4 5.fxe4 Bf2 6.c5 Bxc5
7.Nxc5 gxh2 8.Kxh2
0:43 6/10 0.62 3188245 1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
4.hxg3 h5 5.cxb3 Bc2 6.Nd5+ Kd6
7.Nxg7 Bxb3 8.Ne8+ Kc5
2:45 7/11 0.76 12740455 1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
4.c4 Bxe4 5.fxe4 Rd1 6.Nd5+ Rxd5
7.cxd5 Nf6 8.Nxg7 gxh2 9.Kxh2 Nxe4
10.Ne6
10:26 8/12 1.95 50514968 1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
4.hxg3 Bb4 5.cxb3 Ra3 6.Nd5+ Kd6
7.Nxg7 Be1 8.b4 Bxb4 9.Nxb4 Rxf3
Even after making the first three moves, it still takes CM almost one minute to
find the mate:
Time Depth Score Positions Moves
0:00 1/3 0.00 1066 4.Nd5+ Kd6
0:00 1/4 0.00 2585 4.Nd5+ Kd6
0:00 2/5 0.00 4838 4.Nd5+ Kd6
0:00 2/5 0.54 22718 4.hxg3 h5 5.cxb3 h4 6.Nd5+ Kd6
7.Nxg7 hxg3 8.Ne8+ Kc5
0:00 2/6 0.95 43144 4.hxg3 h5 5.Nd5+ Kd6 6.Nd8 Kc5
7.cxb3 Ra3 8.b4+ Bxb4 9.Ne6+ Kd6
10.Nxb4 Rxf3 11.Nxg7 Bxe4 12.Nxh5
0:01 3/7 0.68 133184 4.hxg3 h5 5.cxb3 Ra3 6.Nd5+ Kd6
7.Nxg7 Rxb3 8.Ne8+ Kc5
0:08 4/8 1.87 641956 4.hxg3 Bb4 5.cxb3 Ba3 6.Nd5+ Kd6
7.Nd8 Kc5 8.b4+ Bxb4 9.Ne6+ Kd6
10.Nxb4
0:25 5/9 1.95 2132798 4.hxg3 Bb4 5.cxb3 Ba3 6.Nd5+ Kd6
7.Nd8 Kc5 8.b4+ Bxb4 9.Ne6+ Kd6
10.Nxb4 Ra3 11.Nxg7 Rxf3
0:58 5/9 Mate09 4884624 4.Nc8+ Kf6 5.Nf8 Kg5 6.hxg3 Bxg3
7.Ne6+ Kf6 8.Nb6 Ke7 9.Nd5+ Kd6
10.Nd8 Kc5 11.Nb7+ Kd4 12.c3#
jm
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