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Subject: Re: Challenge for the weekend (3)

Author: Dan Ellwein

Date: 18:31:15 04/20/02

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On April 20, 2002 at 12:54:26, Ed Schröder wrote:

>4 difficult positions I think Rebel needs to improve.
>
>Free shooting this time.
>
>===========================
>
>[d]7Q/kp3ppp/8/8/q3p3/P5PP/5b2/R1R3K1 w - - 0 1 am Kxf2?; id Qb3! is draw;
>
>Rebel needs 4:17 to avoid Kxf2.

CMLite does not do so well with this one...

sees Kh1 in 1 hour 19 minutes... (approx 231,000,000 positions)

analysis on a 400Mhz Celeron computer...

Time	Depth	Score	Positions	Moves
0:01	1/6	7.85	37255		1. Kxf2 Qd4+ 2. Kg2 Qd2+ 3. Kh1
					Qh6 4. Qc8 Qd2 5. Rc7
0:02	1/7	7.77	76721		1. Kxf2 Qd4+ 2. Kg2 Qd2+ 3. Kh1
					Qg5 4. g4 Qe3 5. Qxh7 Qf3+ 6. Kg1
0:05	1/8	7.75	200328		1. Kxf2 Qd4+ 2. Kg2 Qb2+ 3. Kh1
					Qe5 4. g4 Qg3 5. Qxh7 Qf3+ 6. Kg1
					Qe3+ 7. Kf1
0:13	1/9	7.85	545358		1. Kxf2 Qd4+ 2. Kg2 Qb2+ 3. Kh1
					Qf2 4. Rg1 Qf5 5. Kh2 Qf2+ 6. Rg2
					Qd4 7. Rc1
1:31	1/10	5.95	3616447		1. Kxf2 Qb3 2. Qd8 Qf3+ 3. Ke1
					Qxg3+ 4. Kd1 Qg1+ 5. Kd2 Qf2+ 6.
					Kc3 Qc5+ 7. Kb2 Qb5+ 8. Kc2 Qc5+
					9. Kb3 Qb5+ 10. Ka2 e3
3:11	1/11	4.83	7980190		1. Kxf2 Qb3 2. Qd8 Qf3+ 3. Ke1
					Qxg3+ 4. Kf1 Qxh3+ 5. Ke2 Qf3+
					6. Kd2 Qf2+ 7. Kc3 Qc5+ 8. Kb2
					Qb5+ 9. Kc2 Qe2+ 10. Kb3 Qb5+ 11.
					Ka2
27:44	1/12	1.63	81112115	1. Kxf2 Qb3 2. Rc8 Qf3+ 3. Kg1
					Qxg3+ 4. Kf1 Qxh3+ 5. Ke1 Qe3+
					6. Kd1 Qd4+ 7. Kc2 Qxa1 8. Ra8+
					Kb6 9. Qd8+ Kc6 10. Rc8+ Kb5 11.
					Qd5+ Ka6 12. Ra8+ Kb6 13. Qd6+
					Kb5 14. Qb4+ Kc6 15. Qxe4+ Kc7
					16. Qxh7
1:19:10	1/12	5.51	231290647	1. Kh1 Qd7 2. Qc8 Qd3 3. Qf5 Bxg3
					4. Rd1 Qe2 5. Qa5+ Qa6 6. Qc5+
					Qb6 7. Qxb6+ Kxb6 8. Rab1+ Kc7
					9. Rbc1+ Kb6 10. Rd7 e3 11. Kg2
					Bh4 12. Rxf7

<snip>



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