
White #5Back to problems Vadrya Pokshtya (20210826 08:33:27) White #5 ChessPosition (see diagram)
Vadrya Pokshtya (20210826 08:37:47) White #5 I know this violates all the laws of chess composition, but this my problem is great! White has only one solution. There are no side solutions in the problem. Special thanks to @ Arisktotle from chess dot com for the correction. Paul Brand Lyard (20220220 01:28:22) Whites mat in 6!# 1/Whites plays B.b6*c7+ K.e6*c7 2/Whites K.d6e4 B.f8*T.e7 3/Whites T.c6e6+ T.c7d7 4/Whites T.d6*Td7+ Be8*Td.7 5/Whites retourn K.e4d6 Blacks played K.a7c6 6/Whites done checkmate with last move K.d6*b7#! Six moves for give the checkmate, Mat on five or four moves IS really impossible, the Uniq solution is liberate the knight cell for white castle to.check, to forcing exchange, And just after Come back withnknight on his départ position to attack black King Now innaboidable trapped! Si, checmate solution on this juste only possibles moves and The décisive attack for Whites. Paule.Brand 20220219th. Vadrya Pokshtya (20220220 07:12:09) White #5 Thank you for trying to solve the problem! You are wrong with your first move 1. Bxc7+? Black responds with 1. ...Nb5xc7 and wins. In this chess problem, checkmate is achieved in exactly 5 moves. No more, no less. If you are interested in the solution, then I will post it here. Thanks! Ilmars Cirulis (20220306 11:59:22) White #5 That's like about 70^9 positions to search to prove that it's checkmate in exactly 5 moves... have someone done that? Ilmars Cirulis (20220306 12:03:17) White #5 Ok, my bad  to prove this is checkmate in 5 moves, only about 70^4 or approximately 24'000'000 positions in the tree (about 70 possible black moves against only one white move). 70^9  that's the number if one wants to prove that the solution not only exists but it's also unique... Paul Brand Lyard (20220306 12:10:38) White #5 Ilmars,had you find the solution in 5? No More, no less. I didn't found solution on exacly 5 moves, had you the right solution? Ilmars Cirulis (20220306 12:13:56) White #5 Not yet... this position causes my brain to crash. Vadrya Pokshtya (20220306 17:44:55) White #5 Guys here is the solution. The main line: 1. Nxb7+ Kxe7 2. Bxf6+ Nxf6 3. Rxe6+ Kxf7 4. Rxe5+ Rd5 5. Nd8# Paul Brand Lyard (20220306 19:23:01) White #5 Thanks to you Vadrya# it was an very strong problem to resolute Paul Brand Lyard (20220906 21:13:52) White #5 Bad Cirulis had no resolute the question With is computer...
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