Post #207,183
5/12/05 8:03:46 PM
5/12/05 11:11:07 PM
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Mate in 2.
I've drawn the following board with white pieces capital, black small. Black is moving down the board, white up White to move and checkmate in 2 moves. \n (A) (B) (C) (D) (E) (F) (G) (H)\n --- --- --- --- --- --- --- ---\n (8) | | | | | | | | | (8)\n --- --- --- --- --- --- --- ---\n (7) | | | | | | | | | (7)\n --- --- --- --- --- --- --- ---\n (6) | | | | | | | | | (6)\n --- --- --- --- --- --- --- ---\n (5) | | | | K | | | | | (5)\n --- --- --- --- --- --- --- ---\n (4) | | | | | | | | | (4)\n --- --- --- --- --- --- --- ---\n (3) | | | | | k | p | | R | (3)\n --- --- --- --- --- --- --- ---\n (2) | | | | | | | | Q | (2)\n --- --- --- --- --- --- --- ---\n (1) | | | | | | | | | (1)\n --- --- --- --- --- --- --- ---\n (A) (B) (C) (D) (E) (F) (G) (H)\n Background. This was in a homework set for a co-worker's son from the son's chess teacher. This 8 year old got it in about 3 minutes. I got it on my own fairly quickly, but had to admit that it is a lot trickier than it looks. Multiple others have been well and truly stumped. (Some have gotten it, but with hints and assistance...) Cheers, Ben PS Added labels... I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
Edited by ben_tilly
May 12, 2005, 11:11:07 PM EDT
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Post #207,187
5/12/05 9:33:32 PM
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dunno the issue, whites move?
Q moves diagonal parks between p&k, cant be touched, and k can only move one square at a time, 30 seconds (prolly wrong answer)
thanx,
bill
All tribal myths are true, for a given value of "true" Terry Pratchett
[link|http://boxleys.blogspot.com/|http://boxleys.blogspot.com/]
Any opinions expressed by me are mine alone, posted from my home computer, on my own time as a free american and do not reflect the opinions of any person or company that I have had professional relations with in the past 48 years. meep
questions, help? [link|mailto:pappas@catholic.org|email pappas at catholic.org]
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Post #207,188
5/12/05 9:37:43 PM
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The issue is finding mate in 2
Yes, the situation is obviously won and a large number of moves start a win.
But there is only one way to guarantee a win in 2 moves. Find it.
This could be part of a more complex board, Black might have other stuff elsewhere (eg a pawn that can't readily be stopped from queening) so finding the win in 2 moves is important.
Cheers,
Ben
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
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Post #207,190
5/12/05 9:42:21 PM
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well if
Q moves between k and p only the k can move which allows Q to eat pawn and either the k kills Q, moves down one square (but Q can get him) move up one square and K can get him or move sideways Q can get him. What other option do they have? Keep it out of the subject line or CRC will start whining again :-)
thanx,
bill
All tribal myths are true, for a given value of "true" Terry Pratchett
[link|http://boxleys.blogspot.com/|http://boxleys.blogspot.com/]
Any opinions expressed by me are mine alone, posted from my home computer, on my own time as a free american and do not reflect the opinions of any person or company that I have had professional relations with in the past 48 years. meep
questions, help? [link|mailto:pappas@catholic.org|email pappas at catholic.org]
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Post #207,193
5/12/05 10:52:20 PM
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You are taking more than 2 moves to win.
The sequence is white moves, black moves, then white delivers checkmate. If you take longer than that, then you haven't found the answer.
FYI an 8 year old kid did this problem in 3 minutes.
Cheers,
Ben
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
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Post #207,199
5/12/05 10:59:22 PM
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Re: You are taking more than 2 moves to win.
K moves to block k from the left, leaving k one legal move...
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Post #207,201
5/12/05 11:15:39 PM
5/12/05 11:53:29 PM
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Let's put that in algebraic notation...
I'll edit this one as well since it makes explicit a partial attempt on the problem.
Remember that it is only a solution once you can fill in that mysterious second move and deliver checkmate.
Cheers,
Ben
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
Edited by ben_tilly
May 12, 2005, 11:53:29 PM EDT
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Post #207,205
5/12/05 11:29:04 PM
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Intentially vague
Why spoil it for other people?
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Post #207,206
5/12/05 11:43:40 PM
5/12/05 11:44:01 PM
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I'll hide my response to that in an edit then...
If anyone thinks that they have a full solution, they can hide it in the same way.
Cheers,
Ben
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
Edited by ben_tilly
May 12, 2005, 11:44:01 PM EDT
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Post #207,211
5/13/05 12:31:11 AM
5/13/05 4:12:57 AM
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Mixing notations...
solution in last edit
Edited by dws
May 13, 2005, 12:48:29 AM EDT
Edited by dws
May 13, 2005, 04:12:19 AM EDT
Edited by dws
May 13, 2005, 04:12:57 AM EDT
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Post #207,213
5/13/05 12:44:48 AM
5/13/05 1:43:52 PM
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Response in last edit
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
Edited by ben_tilly
May 13, 2005, 12:45:03 AM EDT
Edited by ben_tilly
May 13, 2005, 01:43:39 PM EDT
Edited by ben_tilly
May 13, 2005, 01:43:52 PM EDT
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Post #207,268
5/13/05 2:03:00 PM
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Dammit
That makes two of us need new glasses.
===
Purveyor of Doc Hope's [link|http://DocHope.com|fresh-baked dog biscuits and pet treats].
[link|http://DocHope.com|http://DocHope.com]
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Post #207,208
5/12/05 11:55:30 PM
5/12/05 11:56:32 PM
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Nevermind.
I was wrong.
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Post #207,210
5/13/05 12:05:55 AM
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Remember to show the entire finish, not just one move
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
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Post #253,556
4/26/06 10:25:28 PM
4/26/06 10:26:01 PM
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Re: Mate in 2.
When somebody asks you to trade your freedoms for security, it isn't your security they're talking about.
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Post #253,583
4/27/06 2:19:31 AM
4/27/06 2:20:33 AM
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Complete solution?
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
Edited by ben_tilly
April 27, 2006, 02:20:33 AM EDT
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Post #253,662
4/27/06 5:11:52 PM
4/27/06 10:35:36 PM
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Edited.
Don't have a board with me, so I can't double check.
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Post #253,665
4/27/06 5:36:19 PM
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Yup, please edit that subject line though.
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
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