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Subject: Re: mate in 11 test position: CM8000 stunningly fast on this!

Author: Roy Eassa

Date: 07:49:07 04/19/02

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On April 19, 2002 at 07:36:17, Ignacio Santos Crespo wrote:

>On April 19, 2002 at 07:33:45, Ignacio Santos Crespo wrote:
>
>>On April 18, 2002 at 23:20:40, K. Burcham wrote:
>>
>>>
>>>Mate in 11.
>>>composed by John Kaan
>>> [D] rn1b2rk/1pp3p1/qp1p2R1/5Q2/3RN2P/1PP5/3PbP2/4K3 w - - 0 1
>>>very difficult for some programs.
>>>kburcham
>>
>>CM8000 ss=12 on Athlon 1200    23 seconds
>>
>>Time	Depth	Score	Positions	Moves
>>0:00	1/5	0.00	116295		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nf7+
>>					Kg8 4. Nh6+ Kh8 5. Nf7+
>>0:02	1/6	6.98	339567		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>>					Nd7 4. Qxd7 Qa1+ 5. Kxe2 Bf6 6.
>>					Nxf6 Qa6+ 7. c4
>>0:09	1/7	16.96	1519936		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>>					Nd7 4. Rxg7 Qa1+ 5. Kxe2 Qf1+ 6.
>>					Kxf1 Ra1+ 7. Ke2 Re1+ 8. Kxe1 Nf6
>>					9. Rxb7
>>0:23	1/8	Mate11	4077834		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>>					Nd7 4. Rxg7 Qa1+ 5. Kxe2 Qf1+ 6.
>>					Kxf1 Ra1+ 7. Ke2 Re1+ 8. Kxe1 Nf6
>>					9. Qg6 Be7 10. Rh7+ Nxh7 11. Qg7#
>>0:35	1/9	Mate11	6809341		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>>					Nd7 4. Rxg7 Qa1+ 5. Kxe2 Qf1+ 6.
>>					Kxf1 Ra1+ 7. Ke2 Re1+ 8. Kxe1 Nf6
>>					9. Qg6 Be7 10. Rh7+ Nxh7 11. Qg7#
>>1:16	1/10	Mate11	12865191	1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>>					Nd7 4. Rxg7 Qa1+ 5. Kxe2 Qf1+ 6.
>>					Kxf1 Ra1+ 7. Ke2 Re1+ 8. Kxe1 Nf6
>>					9. Qg6 Be7 10. Rh7+ Nxh7 11. Qg7#
>
>And CM El Rey             8 seconds
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	-3.79	2461		1. Ra4 Qb5 2. Qxb5 Bxb5 3. Rxa8
>					Bxh4
>0:00	1/3	-3.23	5523		1. Qe6 Kh7 2. Ra4 Bxh4 3. Rxa6 Bxa6
>0:00	1/4	-2.84	16492		1. Qe6 Kh7 2. Ng5+ Bxg5 3. Rxg5
>					g6 4. Ra4 Bc4 5. Rxc4 Qa1+ 6. Ke2
>0:00	2/5	-2.84	55387		1. Qe6 Kh7 2. Ng5+ Bxg5 3. Rxg5
>					g6 4. Ra4 Bc4 5. Rxc4 Qa1+ 6. Ke2
>0:00	2/5	0.00	110418		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nf7+
>					Kg8 4. Nh6+ Kh8 5. Nf7+
>0:02	2/6	8.28	344796		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>					Nd7 4. Qxd7 Qa1+ 5. Kxe2 Bf6 6.
>					Nxf6 Qa6+ 7. c4
>0:08	3/7	Mate11	1682819		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>					Nd7 4. Rxg7 Qa1+ 5. Kxe2 Nf6 6.
>					Qg6 Qf1+ 7. Kxf1 Ra1+ 8. Kg2 Rg1+
>					9. Kxg1 Be7 10. Rh7+ Nxh7 11. Qg7#
>0:16	3/8	Mate11	3505773		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>					Nd7 4. Rxg7 Qa1+ 5. Kxe2 Nf6 6.
>					Qg6 Qf1+ 7. Kxf1 Ra1+ 8. Kg2 Rg1+
>					9. Kxg1 Be7 10. Rh7+ Nxh7 11. Qg7#
>0:38	4/9	Mate11	8323309		1. Rdxd6 cxd6 2. Nxd6 Re8 3. Nxe8
>					Nd7 4. Rxg7 Qa1+ 5. Kxe2 Nf6 6.
>					Qg6 Qf1+ 7. Kxf1 Ra1+ 8. Kg2 Rg1+
>					9. Kxg1 Be7 10. Rh7+ Nxh7 11. Qg7#


By what magic is CM8000 (any version or setting) able to see the mate so
quickly?  In the PV, White does not even give check until move 10!

• Re: mate in 11 test position: CM8000 stunningly fast on this! John Merlino 10:49:34 04/19/02
  • Re: mate in 11 test position: CM8000 stunningly fast on this! Roy Eassa 10:53:03 04/19/02
    • Re: mate in 11 test position: CM8000 stunningly fast on this! John Merlino 11:03:34 04/19/02
      • CMLite finds mate in 25 sec on a 400Mhz Celeron... Dan Ellwein 16:38:29 04/19/02

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