Author: Dann Corbit
Date: 09:32:11 04/18/01
Go up one level in this thread
On April 18, 2001 at 10:20:36, José Antônio Fabiano Mendes wrote: > Mate in 3 [ a curiosity ] Author unknown [at least to me] > [D]4k3/8/4K3/4R3/8/8/8/8 w > It seems there are 28 variants that lead to a mate in 3, > although I am not entirely sure of that,I don't trust my > brain anymore.The funny point is,_any_ Rook move in the starting > position can do the trick,for instance:1.Re1 Kd8 2.Rc1 Ke8 3.Rc8# JAFM 28 looks a bit high: CHEST version 3.19, 18-Dec-1999 Options = f Input file: 'f' Reading job: W: Ke6 Re5 (2) B: Ke8 (1) FEN: 4k3/8/4K3/4R3/8/8/8/8 w - - analysing (mate in 3 moves): Solution (in 3 moves): Re5 - f5 Re5 - g5 Re5 - h5 Re5 - d5 Re5 - c5 Re5 - b5 Re5 - a5 Re5 - e4 Re5 - e3 Re5 - e2 Re5 - e1 refu 1: Kf6+ Kd7 [ 2-] refu 2: Kd6+ Kf7 [ 2-] refu 3: Kd5+ Kd7 [ 2-] refu 4: Kf5+ Kf7 [ 2-] refu 5: Rf5 Kd8 [ 1-] solu 1: Kd8 [ 2+] refu 6: Rg5 -- [ 1-] M2: move solu 2: Kd8 [ 2+] solu 3: Kf8 [ 2+] refu 7: Rh5 -- [ 1-] M2: move solu 4: Kf8 [ 2+] solu 5: Kd8 [ 2+] refu 8: Rd5 -- [ 1-] M2: move solu 6: Kf8 [ 2+] refu 9: Rc5 -- [ 1-] M2: move solu 7: Kf8 [ 2+] solu 8: Kd8 [ 2+] refu 10: Rb5 -- [ 1-] M2: move solu 9: Kf8 [ 2+] solu 10: Kd8 [ 2+] refu 11: Ra5 -- [ 1-] M2: move solu 11: Kf8 [ 2+] solu 12: Kd8 [ 2+] refu 12: Re4 -- [ 1-] M2: move solu 13: Kf8 [ 2+] solu 14: Kd8 [ 2+] refu 13: Re3 -- [ 1-] M2: move solu 15: Kf8 [ 2+] solu 16: Kd8 [ 2+] refu 14: Re2 -- [ 1-] M2: move solu 17: Kf8 [ 2+] solu 18: Kd8 [ 2+] refu 15: Re1 -- [ 1-] M2: move solu 19: Kf8 [ 2+] solu 20: Kd8 [ 2+] Refu tab: 15 refu, 20 solu Time (virt) = 0.000 sec
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