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Subject: Re: Testposition King Safety ( or maybe something else)

Author: John Merlino

Date: 18:03:15 08/28/01

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On August 28, 2001 at 17:20:11, Peter Berger wrote:

>On August 28, 2001 at 16:04:05, John Merlino wrote:
>
>>Chessmaster 8000, on a PIII-600, never considers anything other than Kd6:
>>
>>Time	Depth	Score	Positions	Moves
>>0:00	1/4	0.00	9103		1...Kd6 2. Qa3+ Kd7 3. Qa7+
>>0:00	2/5	0.00	31186		1...Kd6 2. Qa3+ Kd7 3. Qa7+
>>0:01	2/6	0.00	120820		1...Kd6 2. Qa3+ Kd7 3. Qa7+
>>0:03	3/7	0.00	270882		1...Kd6 2. Qa3+ Kd7 3. Qa7+
>>0:10	3/8	0.00	905100		1...Kd6 2. Qa3+ Kd7 3. Qa7+
>>1:02	4/9	0.11	5217414		1...Kd6 2. f3 Bxf3 3. Qb6+ Kd7
>>					4. Qf2 Bxg2 5. Qxg2 Qxg2+ 6. Kxg2
>>					Rc8 7. Rd1+ Ke7 8. Rd3 f6 9. Kf3
>>					Rc4 10. Ke2
>>3:20	5/10	0.10	16979866	1...Kd6 2. f3 Bxf3 3. Qb6+ Kd7
>>					4. Qf2 Bxg2 5. Qxg2 Qxg2+ 6. Kxg2
>>					Rc8 7. Rd1+ Ke7 8. Rd3 f6 9. Bb4+
>>					Ke8 10. Kf3 Rc2 11. Rd2
>
>Hmm, now this is very similar to Fritz and makes me think .. maybe I was wrong
>with some of my thoughts. Have a look at Dieter Bürssner's last post with a good
>eval and main line for Kd6 ( with persistant hashtables , so this is not about a
>competition) . How long does it take Chessmaster to come up with something
>similar ?
>
>Curious.
>
>pete

Chessmaster does not have persistent hashtables. The King engine clears its
tables with every change of game status. However, it was able to see the win for
White in 5:34, on my PIII-600, AFTER I made the moves 1...Kd6 2.f3 Bxf3. So, you
can translate that result as you see fit:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	8871		3. Qb6+ Kd7 4. Qa7+ Ke8 5. Qb8+
					Kd7 6. Qa7+
0:00	2/5	0.00	32841		3. Qb6+ Kd7 4. Qa7+ Ke8 5. Qb8+
					Kd7 6. Qa7+
0:02	2/6	0.00	191257		3. Qb6+ Kd7 4. Qa7+ Ke8 5. Qb8+
					Kd7 6. Qa7+
0:08	3/7	0.00	689667		3. Qb6+ Kd7 4. Qa7+ Kd6
0:31	3/8	0.00	2469104		3. Qb6+ Kd7 4. Qa7+ Kd6
1:16	4/9	0.00	5725408		3. Qb6+ Kd7 4. Qa7+ Kd6
5:34	4/9	1.29	25397643	3. Rc2 Bxg2 4. Be1 Be4+ 5. Bg3+
					Qxg3+ 6. hxg3 Bxc2 7. Qd4+ Ke7
					8. Qc5+ Kf6 9. Qxc2 h5 10. Kf2
7:53	5/10	1.31	37120787	3. Rc2 Bxg2 4. Be1 Be4+ 5. Bg3+
					Qxg3+ 6. hxg3 Bxc2 7. Qd4+ Ke7
					8. Qc5+ Kf6 9. Qxc2 e5 10. Qc6+
					Kf5 11. Kf2

jm



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