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Subject: Re: Test Position: deFirmian-Miles -- Mate in 10!

Author: Chessfun

Date: 20:35:00 11/13/01

Go up one level in this thread


On November 13, 2001 at 23:13:43, William Sprague wrote:

>On November 13, 2001 at 23:01:34, John Merlino wrote:
>
>>On November 13, 2001 at 19:53:14, John Merlino wrote:
>>
>>>Here's a position from a game the 1988 US Championship in Cambridge Springs. Of
>>>special interest, note the move number.
>>>
>>>[D]rn3r1k/ppBnN1p1/2p1p3/6Np/q2bP1b1/3B4/PPP3PP/R2Q1R1K w - - 0 17
>>>
>>
>>Ok. It appears to really be a Mate in 10. My original post was using the default
>>personality. Sorry about that!
>>
>>Here's the report from an SS=12, 32MB personality (PIII-600):
>>
>>Time	Depth	Score	Positions	Moves
>>0:00	1/3	2.36	4894		17. Rxf8+ Nxf8 18. Nf7+ Kh7 19.
>>					e5+ g6 20. Qd2 Kg7 21. Rf1 Bf5
>>					22. Nxf5+ exf5
>>0:00	1/3	2.52	7750		17. Ng6+ Kg8 18. Rxf8+ Nxf8 19.
>>					Ne7+ Kh8 20. Nf7+ Kh7 21. e5+ g6
>>					22. Qd2 Kg7 23. Rf1
>>0:00	1/4	2.36	21760		17. Ng6+ Kg8 18. Rxf8+ Nxf8 19.
>>					Ne7+ Kh8 20. Nf7+ Kh7 21. e5+ g6
>>					22. Qd2 Kg7 23. Rf1 Bf5 24. Nxf5+
>>					exf5
>>0:01	1/5	4.58	99311		17. Ng6+ Kg8 18. Rxf8+ Nxf8 19.
>>					Ne7+ Kh8 20. Qf1 Nbd7 21. Qf7 Nf6
>>					22. e5 Bf5 23. exf6
>>0:03	1/6	6.40	248761		17. Ng6+ Kg8 18. Rxf8+ Nxf8 19.
>>					Ne7+ Kh8 20. Qf1 Bf2 21. Qxf2 Nbd7
>>					22. e5 g6 23. Nxg6+ Nxg6 24. Bxg6
>>0:09	1/7	Mate14	701333		17. Ng6+ Kg8 18. Rxf8+ Nxf8 19.
>>					Ne7+ Kh8 20. Nf7+ Kh7 21. e5+ g6
>>					22. Qd2 Be3 23. Qxe3 Kg7 24. Qh6+
>>					Kxf7 25. Bxg6+ Nxg6 26. Nxg6 Qa3
>>					27. Qh7+ Ke8 28. Qg8+ Qf8 29. Qxf8+
>>					Kd7 30. Qd8#
>>0:10	1/7	Mate12	797706		17. Rxf8+ Nxf8 18. Nf7+ Kh7 19.
>>					e5+ g6 20. Qd2 Be3 21. Qxe3 Kg7
>>					22. Qh6+ Kxf7 23. Bxg6+ Nxg6 24.
>>					Nxg6 Qa3 25. Qh7+ Ke8 26. Qg8+
>>					Qf8 27. Qxf8+ Kd7 28. Qd8#
>>0:14	1/8	Mate11	1189940		17. Rxf8+ Nxf8 18. Qf1 Bf5 19.
>>					exf5 Nbd7 20. fxe6 g6 21. Qf7 Nf6
>>					22. Nxg6+ Nxg6 23. Qxg6 Rf8 24.
>>					Qh6+ Kg8 25. Bh7+ Kh8 26. Qxf8+
>>					Ng8 27. Qxg8#
>>0:26	1/9	Mate10	2428429		17. Rxf8+ Nxf8 18. Qf1 Bf6 19.
>>					Nf7+ Kh7 20. e5+ Qe4 21. Bxe4+
>>					Bf5 22. Bxf5+ g6 23. Bxg6+ Nxg6
>>					24. Ng5+ Bxg5 25. Qf7+ Kh8 26.
>>					Qg8#
>>0:48	1/10	Mate10	4781777		17. Rxf8+ Nxf8 18. Qf1 Bf6 19.
>>					Nf7+ Kh7 20. e5+ Qe4 21. Bxe4+
>>					Bf5 22. Bxf5+ g6 23. Bxg6+ Nxg6
>>					24. Ng5+ Bxg5 25. Qf7+ Kh8 26.
>>					Qg8#
>>
>>jm
>
>John I did the test again running ss=12 (p4 1.3gig)
>Time	Depth	Score	Positions	Moves
>0:00	1/3	2.36	4849		1. Rxf8+ Nxf8 2. Nf7+ Kh7 3. e5+
>					g6 4. Qd2 Kg7 5. Rf1 Bf5 6. Nxf5+
>					exf5
>0:00	1/3	2.52	7705		1. Ng6+ Kg8 2. Rxf8+ Nxf8 3. Ne7+
>					Kh8 4. Nf7+ Kh7 5. e5+ g6 6. Qd2
>					Kg7 7. Rf1
>0:00	1/4	2.36	21725		1. Ng6+ Kg8 2. Rxf8+ Nxf8 3. Ne7+
>					Kh8 4. Nf7+ Kh7 5. e5+ g6 6. Qd2
>					Kg7 7. Rf1 Bf5 8. Nxf5+ exf5
>0:01	1/5	4.58	98644		1. Ng6+ Kg8 2. Rxf8+ Nxf8 3. Ne7+
>					Kh8 4. Qf1 Nbd7 5. Qf7 Nf6 6. e5
>					Bf5 7. exf6
>0:02	1/6	6.40	248972		1. Ng6+ Kg8 2. Rxf8+ Nxf8 3. Ne7+
>					Kh8 4. Qf1 Bf2 5. Qxf2 Nbd7 6.
>					e5 g6 7. Nxg6+ Nxg6 8. Bxg6
>0:06	1/7	Mate14	723251		1. Ng6+ Kg8 2. Rxf8+ Nxf8 3. Ne7+
>					Kh8 4. Nf7+ Kh7 5. e5+ g6 6. Qd2
>					Be3 7. Qxe3 Kg7 8. Qh6+ Kxf7 9.
>					Bxg6+ Nxg6 10. Nxg6 Qa3 11. Qh7+
>					Ke8 12. Qg8+ Qf8 13. Qxf8+ Kd7
>					14. Qd8#
>0:06	1/7	Mate13	825046		1. Rxf8+ Nxf8 2. Nf7+ Kh7 3. e5+
>					g6 4. Qd2 Be3 5. Qxe3 Kg7 6. Qh6+
>					Kxf7 7. Bxg6+ Nxg6 8. Qxg6+ Kxe7
>					9. Bd6+ Kd8 10. Qf6+ Kc8 11. Qf8+
>					Kd7 12. Qe7+ Kc8 13. Qe8#
>0:09	1/8	Mate10	1151176		1. Rxf8+ Nxf8 2. Qf1 Bf6 3. Nf7+
>					Kh7 4. e5+ Qe4 5. Bxe4+ Bf5 6.
>					Bxf5+ g6 7. Bxg6+ Nxg6 8. Ng5+
>					Bxg5 9. Qf7+ Kh8 10. Qg8#
>0:15	1/9	Mate10	2121087		1. Rxf8+ Nxf8 2. Qf1 Bf6 3. Nf7+
>					Kh7 4. e5+ Qe4 5. Bxe4+ Bf5 6.
>					Bxf5+ g6 7. Bxg6+ Nxg6 8. Ng5+
>					Bxg5 9. Qf7+ Kh8 10. Qg8#
>Mate in 10 in 9 seconds
>
>Bill


Since John's line is;
0:26	1/9	Mate10	2428429		17. Rxf8+ Nxf8 18. Qf1 Bf6 19.

And Bill's is;
0:09	1/8	Mate10	1151176		1. Rxf8+ Nxf8 2. Qf1 Bf6 3. Nf7+

And they both have the same settings.

Why is the depth and therefore NPS different.
My own TB at 1.4 ghz SS12 32 mb hash
won't find this till depth 1/9 like John's in 19 seconds.
What ever way I work it 1/8 is always mate in 11.

Can other CM users find this in 1/8?

Sarah.




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