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wu :: forums    riddles    medium (Moderators: Grimbal, william wu, Icarus, towr, SMQ, Eigenray, ThudnBlunder)    Shortest Mate « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: Shortest Mate  (Read 716 times) ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Shortest Mate   « on: Apr 24th, 2003, 10:29am » Quote Modify Construct the shortest possible game where one side delivers mate, but makes only pawn moves. IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. towr wu::riddles Moderator Uberpuzzler Some people are average, some are just mean.     Gender: Posts: 13730 Re: Shortest Mate   « Reply #1 on: Apr 24th, 2003, 11:30am » Quote Modify the shortest I can come up with is 11 moves I think.. IP Logged Wikipedia, Google, Mathworld, Integer sequence DB wowbagger Uberpuzzler     Gender: Posts: 727 Re: Shortest Mate   « Reply #2 on: Apr 24th, 2003, 11:36am » Quote Modify Maybe I have a solution with seven moves, but I haven't verified it on a board yet - it's all in my head.   IP Logged "You're a jerk, <your surname>!" ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Shortest Mate   « Reply #3 on: Apr 24th, 2003, 11:39am » Quote Modify Not bad, towr. I take it you mean 11 half-moves. Either way, there is a shorter mate.   Quote: Maybe I have a solution with seven moves, but I haven't verified it on a board yet - it's all in my head. wowbagger, assuming you mean half-moves, then I think that's where it will remain.     [But I secretly suspect that you both mean full moves. Hehe.]   « Last Edit: Apr 24th, 2003, 11:51am by ThudnBlunder » IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. towr wu::riddles Moderator Uberpuzzler Some people are average, some are just mean.     Gender: Posts: 13730 Re: Shortest Mate   « Reply #4 on: Apr 24th, 2003, 1:16pm » Quote Modify I meant 11 moves for white, and 10 for black.. So full moves.. IP Logged Wikipedia, Google, Mathworld, Integer sequence DB towr wu::riddles Moderator Uberpuzzler Some people are average, some are just mean.     Gender: Posts: 13730 Re: Shortest Mate   « Reply #5 on: Apr 24th, 2003, 1:24pm » Quote Modify I'm at 9 half-moves now.. progress :p   if you don't have a chessboard (like me) this may help http://www.users.cloud9.net/~eveusebi/jjohne.html (though it's not a very good substitute in all) IP Logged Wikipedia, Google, Mathworld, Integer sequence DB cho Guest Re: Shortest Mate   « Reply #6 on: Apr 24th, 2003, 1:30pm » Quote Modify Remove The best I've come up with is 9 half moves. Seven seems inconceivable. IP Logged wowbagger Uberpuzzler     Gender: Posts: 727 Re: Shortest Mate   « Reply #7 on: Apr 25th, 2003, 2:44am » Quote Modify on Apr 24th, 2003, 11:39am, THUDandBLUNDER wrote: wowbagger, assuming you mean half-moves, then I think that's where it will remain.     [But I secretly suspect that you both mean full moves. Hehe.]   Actually, I did mean seven moves (six Black moves).   I haven't thought about cho's claim yet, but here's the first solution that I arrived at: 1. e4 f5 2. exf5 Na6 3. g4 Nb8 4. g5 Na6 5. f6 Nb8 6. g6 Na6 7. f7++ Obviously I didn't exhaust the possibility of Black moves helping White. Blame it on my reluctance to solve chess puzzles blind. « Last Edit: Apr 25th, 2003, 2:45am by wowbagger » IP Logged "You're a jerk, <your surname>!" ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Shortest Mate   « Reply #8 on: Apr 25th, 2003, 7:08am » Quote Modify on Apr 24th, 2003, 1:30pm, cho wrote: The best I've come up with is 9 half moves. Seven seems inconceivable. How about eight? IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Shortest Mate   « Reply #9 on: Apr 30th, 2003, 6:53pm » Quote Modify As everyone seems to have given up on this, here is an 8-ply solution: 1. f3 e5 2. Kf2 h5 3. Kg3 h4+ 4. Kg4 d6 (or d5) mate « Last Edit: Apr 30th, 2003, 7:14pm by ThudnBlunder » IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. visitor Guest Re: Shortest Mate   « Reply #10 on: Apr 30th, 2003, 7:20pm » Quote Modify Remove I think your solution needs another check, mate. There's one escape move. IP Logged ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Shortest Mate   « Reply #11 on: Apr 30th, 2003, 8:55pm » Quote Modify on Apr 30th, 2003, 7:20pm, visitor wrote: I think your solution needs another check, mate. There's one escape move. Why don't you play it then?   « Last Edit: May 24th, 2003, 5:27am by ThudnBlunder » IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. jkit Guest Re: Shortest Mate   « Reply #12 on: May 24th, 2003, 12:46am » Quote Modify Remove 4 half moves, two moves per color.  However I don't know how to write hidden answers, as I am new to this forum.   Further, there are two possible (though very similar) solutions. IP Logged jkit Guest Re: Shortest Mate   « Reply #13 on: May 24th, 2003, 12:48am » Quote Modify Remove Whoops, seems like I miss read the problem.  I thought that "only pawn moves" was an assertion about just one side, but after rereading, I believe it means that the mating side must use only pawn moves.  Sorry for the false solution. IP Logged ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Shortest Mate   « Reply #14 on: May 24th, 2003, 1:32am » Quote Modify Quote: However I don't know how to write hidden answers See http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_sug gestions;action=display;num=1043138466   Quote: 4 half moves, two moves per color. jkit, I hesitate to point this out, but your solution is called Fool's Mate.       1. f3 (or f4)  e6 (or e5) 2. g4  Qh4 mate -------------------------------------------------------------------- The mating side makes pawn moves only. The losing side can make any legal moves.   « Last Edit: May 24th, 2003, 5:48am by ThudnBlunder » IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. 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