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keldorn
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posted August 20, 2008 11:20 AM |
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Edited by keldorn at 11:21, 20 Aug 2008.
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No, e4 is incorrect. White has a lot of mate threats but black can defend all. In fact, e4 doesn't change the position very dramatically. So that's a waiting move. But white can't afford such a move
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Doomforge
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posted August 20, 2008 11:21 AM |
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nope, it wasn't 
The mate in four, for example:
1. h5 h6 + ; d8 g5
2. h6 d6 + ; e8 e5
3. d6 d2 + ; e6 e3
4. d2 x e3 ++
black can use a few countermoves here but it all ends in four moves anyway.
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keldorn
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posted August 20, 2008 11:22 AM |
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Well, you must be right, I won't search for the potential mistakes in it, I'm a bit tired to do so
But what's mate in 2?
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JoonasTo
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What if Elvin was female?
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posted August 20, 2008 11:22 AM |
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So educate me.
What does black do after e2-e4?
If he doesn't eat the pawn there's a knight mate. If he does eat the pawn then the other pawn eats the rook and there's a discovered mate.
So waht does he do?
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Doomforge
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posted August 20, 2008 11:25 AM |
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1. e2 e3+ ; e8 x e3
2. g1 e3+ ; f4 x e3
EDIT: oh, sorry, you mentioned e2 e4, not e2 e3 lol
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keldorn
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posted August 20, 2008 11:27 AM |
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As I said previously, e4 is nothing but waiting. All black needs to do is to wait as white did. He does so with a pawn move: c3. All of white's mates are defended.
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JoonasTo
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What if Elvin was female?
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posted August 20, 2008 11:29 AM |
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But white can do c1-e2++ if black doesn't take the pawn.
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keldorn
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posted August 20, 2008 11:30 AM |
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Interesting. I'll check it later, but i got to go now. Doom, if you want, you may look after it. There must be an error in it, because it's not the correct answer 
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Doomforge
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posted August 20, 2008 11:33 AM |
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sure, I'll check it.
Mate in three:
1. c7 x e8
now if 1... f8 x e8, 2. h5 e5 ++ so it's not the best move
if 1. ... (any move), 2. e8 f6 which leads to unavoidable mate in third move by the queen.
I still can't see a proper mate in two, though.
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Doomforge
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posted August 20, 2008 11:46 AM |
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Joonas: Check this out:
1. e2 e4 ; d8 g5
2. c1 e2 + ; f4 e5
3. ...
See? that's not a mate in two.
Another mate in three discovered by me:
1. h4 h6+ ; d8 g5
2. h2 h4+; f4 e5
3. h2 e4 ++
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JoonasTo
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What if Elvin was female?
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posted August 20, 2008 11:48 AM |
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See. This is why I'm the amateur. I can't see the bigger picture.
But that move destroys almost every mate try. Maybe you just found the key to this one. Maybe I'm useful after all.
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Doomforge
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posted August 20, 2008 11:50 AM |
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sure you are. 
I'm not even certain there is a mate in two here possible unless black plays stupid..
Further analysis: There is no mate in two. :-X
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JoonasTo
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posted August 20, 2008 12:05 PM |
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I'm slowly coming to the same conclusion but I'm not going to give up just yet.
I have my dinner rest for this before going jogging. Not that I will find anything, probably.
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Doomforge
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posted August 20, 2008 12:07 PM |
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I don't think you will because it's not possible, there is no such move. I decided to check it once-and-for-all and set up such a position in CM11, then asked for advice.. the best move the AI was able to perform was a check in three. So there is no check in two.
First time I had to double-check my guessing, though.
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JoonasTo
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posted August 20, 2008 12:08 PM |
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That's pretty well. Maybe Keldorn messed up somewhere? Or there's a bug in the CM? Strange.
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Doomforge
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posted August 20, 2008 12:11 PM |
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well It's not possible for a machine to miss a mate in two, if its possible. The mate in two can occur only after a silly move of the black, and a good puzzle shouldn't be solvable only if the enemy performs a bad move..
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Asheera
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posted August 20, 2008 12:16 PM |
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Quote:
well It's not possible for a machine to miss a mate in two
Are you sure?
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Doomforge
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posted August 20, 2008 12:16 PM |
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keldorn
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posted August 20, 2008 12:44 PM |
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Keep looking, mate in 2 is surely possible. I guarantee 
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Asheera
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posted August 20, 2008 12:45 PM |
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h5-h6+
f4-e5
h2-h5++
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This thread is pages long: 
