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Subject: Re: If you like to solve easy forced mate... (mate in 7)

Author: leonid

Date: 13:36:18 01/24/01

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On January 24, 2001 at 15:05:58, Dann Corbit wrote:

>On January 24, 2001 at 13:53:17, Heiner Marxen wrote:
>[sniup]
>>>If you have somewhere forced mate position from real championship and that is
>>>above 6 moves deep, please put it here. Best will be well populated, with many
>>>pieces. This is actually what I wanted to do today but was not able to find
>>>suitable one. All the time some short mates in 3 and 4. It will be curious to
>>>see how actual chess program perform in real forced mate situation.
>Here are some from the 1924 NY Chess contest of great fame.  They are of varying
>degrees of difficulty.
>
>1K2k3/8/8/P4pp1/3R1Pp1/8/8/8 w - - acd 11; ce 32754; pv a6 gxf4 a7 Ke7 a8=Q Kf6
>Rd6+ Kg5 Qh1 g3 Rh6 f3 Qh4#; pm a6; id "C.A.P. 786110";
>1K2k3/8/P7/5pp1/3R1P2/6p1/8/8 w - - acd 7; ce 32754; pv a7 gxf4 a8=Q Kf7 Qc6 Kg8
>Qg6+ Kf8 Rd8+ Ke7 Re8+ Kd7 Qe6#; pm a7; id "C.A.P. 786111";
>1K2k3/P7/8/5p2/3R1p2/6p1/8/8 w - - acd 6; ce 32756; pv a8=Q Kf7 Qc6 Kg8 Qg6+ Kf8
>Rd8+ Ke7 Re8+ Kd7 Qe6#; pm a8=Q; id "C.A.P. 786113";
>1r4k1/p2Q2p1/8/3Pq3/2P1p1B1/P6P/6P1/6K1 b - - acd 5; ce 32756; pv Rb1+ Kf2 e3+
>Kf3 Rf1+ Ke2 Rf2+ Ke1 Qc3+ Kd1 Qa1#; pm Rb1+; id "C.A.P. 811239";
>2Q5/4kp1p/4p3/3pP1PN/8/1p1q4/1P3KP1/8 w - - acd 4; ce 32760; pv Qc7+ Ke8 Nf6+
>Kf8 Qd8+ Kg7 Qg8#; pm Qc7+; id "C.A.P. 811987";
>2bnN1k1/6P1/4p3/1P2N1P1/3K4/8/8/8 w - - acd 7; ce 32760; pv g6 Ba6 Nd7 e5+ Ke3
>Bxb5 Ndf6#; pm g6; id "C.A.P. 805549";
>2bnNk2/8/4p1P1/1P2N1P1/3K4/8/8/8 w - - acd 9; ce 32756; pv g7+ Kxe8 g8=Q+ Ke7
>Ng6+ Kd7 Qh7+ Nf7 Qxf7+ Kd6 Qe7#; pm g7+; id "C.A.P. 805557";
>3Q4/5pkp/4pN2/3pP1P1/8/1p1q4/1P3KP1/8 w - - acd 4; ce 32766; pv Qg8#; pm Qg8#;
>id "C.A.P. 910776";
>3b1q1k/r4r1p/7R/pppPpQp1/4P1N1/1PP3P1/1P3PK1/7R w - - acd 4; ce 32762; pv Rxh7+
>Kg8 Rh8+ Kg7 R1h7#; pm Rxh7+; id "C.A.P. 811926";
>3b1qk1/r4r1R/8/pppPpQp1/4P1N1/1PP3P1/1P3PK1/7R w - - acd 4; ce 32764; pv Rh8+
>Kg7 R1h7#; pm Rh8+; id "C.A.P. 811929";
>3b1qk1/r5rR/6Q1/pppPp1p1/4P1N1/1PP3P1/1P3PK1/7R w - - acd 4; ce 32766; pv Rh8#;
>pm Rh8#; id "C.A.P. 811930";
>3q3Q/4b3/2pk3p/p2p1B2/5P2/P1N3P1/1P5P/7K w - - acd 4; ce 32758; pv Qe5+ Kc5 Na4+
>Kc4 Qc3+ Kb5 Bd3+ Kxa4 Qc2#; pm Qe5+; id "C.A.P. 910765";
>3q3k/pp4p1/2bbN1Pp/5p2/3nr3/5N1Q/PPr4P/R1B2R1K b - - acd 9; ce 32750; pv Qh4 Bd2
>Qxh3 Neg5 Nxf3 Nf7+ Kg8 Nxh6+ gxh6 Rf2 Re1+ Rxe1 Nxd2+ Kg1 Qg4+ Rg2 Qxg2#; pm
>Qh4; id "C.A.P. 910760";
>4k3/2Q2p1p/4p3/3pP1PN/8/1p1q4/1P3KP1/8 w - - acd 4; ce 32762; pv Nf6+ Kf8 Qd8+
>Kg7 Qg8#; pm Nf6+; id "C.A.P. 910380";
>5k2/2Q2p1p/4pN2/3pP1P1/8/1p1q4/1P3KP1/8 w - - acd 4; ce 32764; pv Qd8+ Kg7 Qg8#;
>pm Qd8+; id "C.A.P. 808954";
>5k2/5p1p/4p3/3pP1PN/8/1p1q4/1P3KP1/2Q5 w - - acd 4; ce 32758; pv Qc8+ Ke7 Qc7+
>Ke8 Nf6+ Kf8 Qd8+ Kg7 Qg8#; pm Qc8+; id "C.A.P. 808955";
>6k1/p2Q2p1/8/3P4/2P3B1/P1q1p2P/1r4P1/5K2 b - - acd 4; ce 32764; pv Qc1+ Bd1
>Qxd1#; pm Qc1+; id "C.A.P. 911689";
>6k1/p2Q2p1/8/3Pq3/2P1p1B1/P6P/5KP1/1r6 b - - acd 4; ce 32758; pv e3+ Kf3 Rf1+
>Ke2 Rf2+ Ke1 Qa1+ Bd1 Qc3#; pm e3+; id "C.A.P. 911692";
>6k1/p2Q2p1/8/3Pq3/2P3B1/P3p2P/1r4P1/4K3 b - - acd 4; ce 32762; pv Qc3+ Kf1 Qc1+
>Bd1 Qxd1#; pm Qc3+; id "C.A.P. 911697";
>6k1/p2Q2p1/8/3Pq3/2P3B1/P3p2P/4K1P1/1r6 b - - acd 4; ce 32760; pv Rb2+ Kf1 e2+
>Kf2 e1=Q+ Kf3 Rf2#; pm Rb2+; id "C.A.P. 911699";
>8/3r1P2/4P3/7p/2k4P/3pKP2/8/8 w - - acd 7; ce 32754; pv exd7 Kb5 f8=Q d2 d8=Q
>d1=Q Qb8+ Kc6 Qfc8+ Kd5 Qb5+ Kd6 Qcd7#; pm exd7; id "C.A.P. 808101";
>8/KP6/2k5/8/P1P5/8/8/8 w - - acd 13; ce 32752; pv b8=Q Kc5 Qb6+ Kxc4 Qe3 Kd5 Kb6
>Kd6 Qe4 Kd7 Qe5 Kd8 Kc6 Kc8 Qh8#; pm b8=Q; id "C.A.P. 912187";
>8/k7/8/K7/P7/1PP5/8/8 w - - acd 21; ce 32742; pv Kb5 Kb8 Kc6 Kc8 a5 Kb8 b4 Kc8
>a6 Kb8 b5 Kc8 a7 Kd8 Kd6 Ke8 Ke6 Kf8 a8=Q+ Kg7 Qg2+ Kh6 Kf6 Kh5 Qg5#; pm Kb5; id
>"C.A.P. 912183";
>8/k7/8/KP6/P7/2P5/8/8 w - - acd 16; ce 32748; pv b6+ Kb7 Kb5 Kb8 Kc6 Kc8 b7+ Kd8
>b8=Q+ Ke7 Qf4 Ke6 a5 Ke7 Qf5 Ke8 Kd6 Kd8 Qf8#; pm b6+; id "C.A.P. 912185";
>R4nk1/5p1p/4p3/3pP1PN/8/1p1q4/1P3KP1/2Q5 w - - acd 4; ce 32756; pv Rxf8+ Kxf8
>Qc8+ Ke7 Qc7+ Ke8 Nf6+ Kf8 Qd8+ Kg7 Qg8#; pm Rxf8+; id "C.A.P. 910708";
>k7/4R3/8/P7/NKP5/1N3r2/7r/8 w - - acd 12; ce 32748; pv Nd4 Rb2+ Nxb2 Rf1 Na4
>Rb1+ Kc5 Kb8 Nb6 Rb5+ Kd6 Rxb6+ axb6 Ka8 Ra7+ Kb8 Nc6+ Kc8 Rc7#; pm Nd4; id
>"C.A.P. 912145";
>k7/8/KP6/8/P7/2P5/8/8 w - - acd 15; ce 32748; pv Kb5 Kb7 a5 Kc8 a6 Kd7 a7 Ke6
>a8=Q Kf5 Qf3+ Kg5 b7 Kg6 b8=Q Kg7 Qbf8+ Kh7 Q3f7#; pm Kb5; id "C.A.P. 912146";

Thanks! I will print them all for my small library for sure but are they from
world chess championship, or something like this? Or this is from some kind of
competition of "composition" of problems?

Leonid.



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