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Subject: Re: Mate that every program will find.

Author: Steven J. Brann

Date: 06:33:21 04/26/01

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On April 26, 2001 at 08:00:06, leonid wrote:

>Hello!
>
>This mate your program will see, probably, as too easy. Still it could the real
>pleasure to see it at work.
>
>[D]5b1r/1Pq1Pk2/p7/4Q3/1R1PP1B1/4Kn1N/R2p2rB/1N3b1n b - -
>
>Please, say what was the result.
>
>Thanks,
>Leonid.

CM8K finds two solutions:

1) Re2+  Mate in 11 in less than a second
Sees Mate in 10 for a bit then,
2) Bh6+  Mate in 9 in 1.01

Running on PIII 933 with 32MB ttable

Time	Depth	Score	Positions	Moves
0:00	1/3	-5.79	8942		1...Bh6+ 2. Bf4 Nxe5 3. e8=Q+ Rxe8
					4. Bh5+ Rg6 5. dxe5 Bxh3 6. Nxd2
0:00	1/4	-Mate11	54349		1...Re2+ 2. Kxf3 Rxh3+ 3. Bxh3
					Rf2+ 4. Kg4 d1=Q+ 5. Kg5 Qxe7+
					6. Qxe7+ Bxe7+ 7. Kh6 Rf6+ 8. Kg5
					Rf3+ 9. Kg4 Bxh3+ 10. Kh5 Rf5+
					11. Kh6 Rh5#
0:01	2/5	-Mate10	138075		1...Re2+ 2. Kxf3 Rxh3+ 3. Bxh3
					Rf2+ 4. Kg4 d1=Q+ 5. Kg5 Qxe7+
					6. Qxe7+ Bxe7+ 7. Kh6 Rf6+ 8. Kg5
					Rf3+ 9. Kg4 Rf2+ 10. Re2 Bxe2#
0:03	2/6	-Mate10	420260		1...Re2+ 2. Kxf3 Rxh3+ 3. Bxh3
					Rf2+ 4. Kg4 d1=Q+ 5. Kg5 Qxe7+
					6. Qxe7+ Bxe7+ 7. Kh6 Rf6+ 8. Kg5
					Rf3+ 9. Kg4 Rf2+ 10. Re2 Bxe2#
0:10	3/7	-Mate10	1256121		1...Re2+ 2. Kxf3 Rxh3+ 3. Bxh3
					Rf2+ 4. Kg4 d1=Q+ 5. Kg5 Qxe7+
					6. Qxe7+ Bxe7+ 7. Kh6 Rf6+ 8. Kg5
					Rf3+ 9. Kg4 Rf2+ 10. Re2 Bxe2#
0:27	3/8	-Mate10	3441778		1...Re2+ 2. Kxf3 Rxh3+ 3. Bxh3
					Rf2+ 4. Kg4 d1=Q+ 5. Kg5 Qxe7+
					6. Qxe7+ Bxe7+ 7. Kh6 Rf6+ 8. Kg5
					Rf3+ 9. Kg4 Rf2+ 10. Re2 Bxe2#
1:01	3/8	-Mate09	7688100		1...Bh6+ 2. Bf4 Bxf4+ 3. Qxf4+
					Qxf4+ 4. Kxf4 Rxg4+ 5. Ke3 d1=Q
					6. e8=Q+ Rxe8 7. Ng5+ Kg8 8. Rd2
					Qe1+ 9. Kxf3 Qg3#
1:26	4/9	-Mate09	10770091	1...Bh6+ 2. Bf4 Bxf4+ 3. Qxf4+
					Qxf4+ 4. Kxf4 Rxg4+ 5. Ke3 d1=Q
					6. e8=Q+ Rxe8 7. Ng5+ Kg8 8. Rd2
					Qe1+ 9. Kxf3 Qg3#
2:42	4/10	-Mate09	20361352	1...Bh6+ 2. Bf4 Bxf4+ 3. Qxf4+
					Qxf4+ 4. Kxf4 Rxg4+ 5. Ke3 d1=Q
					6. e8=Q+ Rxe8 7. Ng5+ Kg8 8. Rd2
					Qe1+ 9. Kxf3 Qg3#
6:17	5/11	-Mate09	48318399	1...Bh6+ 2. Bf4 Bxf4+ 3. Qxf4+
					Qxf4+ 4. Kxf4 Rxg4+ 5. Ke3 d1=Q
					6. e8=Q+ Rxe8 7. Ng5+ Kg8 8. Rd2
					Qe1+ 9. Kxf3 Qg3#

Steve



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