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        riddles >> medium >> Chess Puzzle
        
(Message started by: ThudanBlunder on Dec 30th, 2009, 5:49am)
Title: Chess Puzzle
Post by ThudanBlunder on Dec 30th, 2009, 5:49am
White to play and win.  ???
Title: Re: Chess Puzzle
Post by ThudanBlunder on Dec 30th, 2009, 12:35pm
At first sight promising looks
1. f6  Bxh3
2). Rh1  Rc8
3). Rxh3 Kg8 with mating threats, but I don't see any good continuation.
Title: Re: Chess Puzzle
Post by Hippo on Dec 30th, 2009, 11:55pm
I didn't analyze the position, but it looks like zugzwang and I would start analysis with Bg4.
Title: Re: Chess Puzzle
Post by Hippo on Jan 10th, 2010, 12:53am

on 01/08/10 at 04:39:05, ThudanBlunder wrote:
I think the first move is 1. Rd7
It wins against the obvious 1...Bxd7, anyway.
2. cxd7 Rd8
3. f6 etc.

But Black can play 1...Re3 with apparant equality.


1. Rd7 Re3
2. f6 Bxd7
3. Bxd7 looks good as well

1. Rd7 Re3
2. f6 Rxh3
3. Rd8 mate
... nice solution ThudanBlunder

But what about:
1. Rd7 Kg7
2. c7   Bxd7
3. f6+ Kxf6
4. Bxd7

1. Rd7 Kg7
2. c7 Kf6
3. Rd8 Ke7
4. f6+ Kf8
5. Rxe8 Kxe8
6. Bxc8

1. Rd7 Kg8
2. f6 Kh7
3. c7

1. Rd7 Kg8
2. f6 not Kh7 (nor check)
3. Bf5
Title: Re: Chess Puzzle
Post by ThudanBlunder on Jan 10th, 2010, 7:02am

on 01/10/10 at 00:53:34, Hippo wrote:
1. Rd7 Re3
2. f6 Bxd7
3. Bxd7 looks good as well

What about 2...Ke8?
Title: Re: Chess Puzzle
Post by Hippo on Jan 10th, 2010, 9:24am

on 01/10/10 at 07:02:35, ThudanBlunder wrote:
What about 2...Ke8?


1. Rd7 Re3
2. f6 Ke8
3. Rd3? Rxh3 does not look well

1. Rd7 Re3
2. f6 Ke8
3. Re7+ Rxe7
4. Bxc8 Rc7
5. Bb7 ... I am not sure ... there is "stalemate" at c column, black should activate it's king through h7 ...

But
1. Rd7 Re3
2. f6 Ke8
3. Re7+ Rxe7
4. Bxc8 Ra7
and black approaches with his king
Title: Re: Chess Puzzle
Post by ThudanBlunder on Jan 10th, 2010, 9:59am
Hippo and Johan, I have been informed by the person who sent this to ChessBase that the key move is 1. f6!!
and if
1...Bxh3 then 2. c7! followed by 3. Rd8

But I still can't find a win! ::)

Ah, I think I have it. Black is reduced to moving his bishop along the b7-c8-h3 diagonal and/or pushing pawns.
In the meantime, White activates his king and eats the pawns before queening his own. Sound plausible?
Title: Re: Chess Puzzle
Post by Hippo on Jan 10th, 2010, 12:14pm

on 01/10/10 at 09:59:22, ThudanBlunder wrote:
Hippo and Johan, I have been informed by the person who sent this to ChessBase that the key move is 1. f6!!
and if
1...Bxh3 then 2. c7! followed by 3. Rd8

But I still can't find a win! ::)

Ah, I think I have it. Black is reduced to moving his bishop along the c8-h3 diagonal and/or pushing pawns.
In the meantime, White activates his king and eats the pawns before queening his own. Sound plausible?


Yes, interesting :), black must move such that the bishop either occupies or protects c8. White has a2 pawn while black a6 so white wins zugzwang fight for c4 pawn (he must hurry while there is a3/a4 choice).

The black can be "stalemated" with rook king touching each other either on e8,f8 or f8,g8.
Title: Re: Chess Puzzle
Post by kg on Jan 11th, 2010, 5:35pm
Instead of Rd8 try rh1. Black removes Bishop or loses it any case rh8 or pc8 will ensure win
Title: Re: Chess Puzzle
Post by ThudanBlunder on Jan 12th, 2010, 2:09am

on 01/11/10 at 17:35:21, kg wrote:
Instead of Rd8 try rh1. Black removes Bishop or loses it any case rh8 or pc8 will ensure win

No, this was covered in my first post.
2. Rh1 only draws.

Anyway, had you read my last post properly you would know that the answer to this puzzle has been found.


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