Author: Otello Gnaramori
Date: 13:23:50 07/30/01
For my own curiosity I tried another wonderful problem from Krabbe' Collection,the so called Diagram of the Century, available here with my faithful computerized friend Fritz6 : http://www.xs4all.nl/~timkr/chess/babs.html Fritz6 mate search engine in a fraction of second erupts the correct solution , a mate in 4 starting with 1. a7 ! : 1.a7 threatening axb8Q(#3) 1...axb1Q [1...axb1R 2.axb8R threatening Rxf4#(#1) 2...Re1 (2...Rxb2 3.Rxb3) 3.Rxf4+ (3.Qc1; 3.Qb1; 3.Rxb3) ; 1...axb1B 2.axb8B threatening Rxf4+(#2) 2...Bc2 (2...Be4 3.Bxf4) 3.Rxf4+ (3.Qe1; 3.Bxf4; 3.Qc1; 3.Nd6; 3.Qh1) ; 1...axb1N 2.axb8N threatening Rxf4#(#1) 2...Nxd2 (2...Nc3 3.Rxf4+ (3.Qb1; 3.Bf3; 3.Bg2; 3.Bh1; 3.f3; 3.Qh1) ; 3.Qc1; 1...Qd6 2.Re1 threatening Re4#(#1) 2...Qe5 (2...Qc6 3.Rxf4+) 3.Qc1 (3.Nxe5) ; 1...Qe5 2.Bxe7 threatening Bxf6(#2) 2...axb1Q a)2...axb1N 3.Bxf6 (a)3.d8Q+; a)3.d8R+) ; b)2...Qd6 3.Nxd6; c)2...Qb8+ 3.axb8N (c)3.axb8Q; c)3.axb8R; c)3.axb8B) ; d)2...Qd5 3.Rxf4+ (d)3.Bxd5) ; 3.d8Q+; 1...Qxa8 2.Rxf4+ Qe4 3.a8Q; 1...Qxd8+ 2.Kg7 threatening Rxf4#(#1) 2...axb1Q a)2...Qc7 3.d8Q+ (a)3.d8R+) ; b)2...Qb8 3.axb8R (b)3.axb8B; b)3.axb8N; b)3.d8Q+; b)3.d8R+; b)3.axb8Q) ; c)2...Qf8+ 3.Kxf8; d)2...Qg8+ 3.Kxg8; e)2...Qh8+ 3.Kxh8; 3.Rxf4+] 2.axb8Q threatening Qd6+(#2) 2...Qc2 [2...Qe4 3.Qxf4 (3.Rxf4) ; 2...Qxb2 3.Qxb3] 3.Qd6+ [3.Qxf4+; 3.Rxf4+] ...Another surprising task achievement by this little monsters. Regards
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