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Date: 15 May 2005 22:02:55
From: Douglas Yee
Subject: Reinfeld's _1001 Brilliant Ways to Checkmate_
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I'm finally making my way through this old classic and had a
a question about Problem #548:
[FEN "r3nr1k/ppqbNpp1/7p/2p1p3/2B4Q/P4P2/1PP4P/2KR2R1 w - - 0 1"]
The answer Reinfeld gives (translating from descriptive) is
1.Rxg7 Kxg7 (1.-Nxg7 2.Qxh6++) 2.Rg1+ Kh7 3.Bd3+ f5 4.Rg6 any
5.Qxh6++. Black can delay mate for a few more moves by playing
3.-e4 instead of 3.-f5, but if 1.-Qb6 is played instead of
1.-Kxg7, is there still a forced mate?
Problem #513 turned out to be a very interesting study:
[FEN "r1b2rk1/pp1p1pp1/1q1n2np/2b3NQ/2B1N3/8/PP3PPP/R1B2RK1 w - - 0 1"]
1.Qxg6 is the obvious first move in the sequence, but where to go
from here? Reinfeld gives the straightforward solution 1.Qxg6 hxg5
2.Nf6+ Kh8 3.Qh7++. But what if 1.-Re8 instead? After thinking
about it for a while and giving up, I ran the position through
ChestUCI which eventually came back with two main Mate in 9
lines. The second line is particularly impressive:
A) 1.Qxg6 Re8 2.Nxd6 Qxd6 3.Qxf7+ Kh8 4.Qxe8+ Qf8 5.Qg6 Qg8
6.Bxg8 Kxg8 7.Qf7+ Kh8 8.Qe8 Bf8 9.Qxf8++
B) 1.Qxg6 Re8 2.Bf4 Re6 3.Bxe6 Qd8 4.Be5 Bxf2+ 5.Rxf2 Nf5
6.Nf6+ Qxf6 7.Bxf6 h5 8.Bxf7+ Kh8 9.Qh7++
I actually came close to finding A) on my own but had problems
visualizing the board towards the end of the sequence. B) seems
to be the sort of solution only a computer would likely find.
--
Douglas
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Date: 16 May 2005 16:00:02
From: Antonio Torrecillas
Subject: Re: Reinfeld's _1001 Brilliant Ways to Checkmate_
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En/na Douglas Yee ha escrit:
> Problem #513 turned out to be a very interesting study:
> [FEN "r1b2rk1/pp1p1pp1/1q1n2np/2b3NQ/2B1N3/8/PP3PPP/R1B2RK1 w - - 0 1"]
>
> 1.Qxg6 is the obvious first move in the sequence, but where to go
> from here? Reinfeld gives the straightforward solution 1.Qxg6 hxg5
> 2.Nf6+ Kh8 3.Qh7++. But what if 1.-Re8 instead? After thinking
> about it for a while and giving up, I ran the position through
> ChestUCI which eventually came back with two main Mate in 9
> lines. The second line is particularly impressive:
>
> A) 1.Qxg6 Re8 2.Nxd6 Qxd6 3.Qxf7+ Kh8 4.Qxe8+ Qf8 5.Qg6 Qg8
> 6.Bxg8 Kxg8 7.Qf7+ Kh8 8.Qe8 Bf8 9.Qxf8++
>
> B) 1.Qxg6 Re8 2.Bf4 Re6 3.Bxe6 Qd8 4.Be5 Bxf2+ 5.Rxf2 Nf5
> 6.Nf6+ Qxf6 7.Bxf6 h5 8.Bxf7+ Kh8 9.Qh7++
>
> I actually came close to finding A) on my own but had problems
> visualizing the board towards the end of the sequence. B) seems
> to be the sort of solution only a computer would likely find.
When playing a game 1...Re8 is not a move to consider because white is a
piece up and has an strong attack. In that case white do not need to
find a mate in 9 and surely black would resign in a few moves.
I suppose reinfeld solution was the line played with only "relevant"
lines added.
AT
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Date: 16 May 2005 11:49:14
From: Reinhold Stansich
Subject: Re: Reinfeld's _1001 Brilliant Ways to Checkmate_
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Douglas Yee schrieb:
> I'm finally making my way through this old classic and had a
> a question about Problem #548:
> [FEN "r3nr1k/ppqbNpp1/7p/2p1p3/2B4Q/P4P2/1PP4P/2KR2R1 w - - 0 1"]
>
> The answer Reinfeld gives (translating from descriptive) is
> 1.Rxg7 Kxg7 (1.-Nxg7 2.Qxh6++) 2.Rg1+ Kh7 3.Bd3+ f5 4.Rg6 any
> 5.Qxh6++. Black can delay mate for a few more moves by playing
> 3.-e4 instead of 3.-f5, but if 1.-Qb6 is played instead of
> 1.-Kxg7, is there still a forced mate?
IMHO 2. Rg6 leads to mate soon. Black has to take with 2...Qxg6 3. Nxg6
and mate to follow in a few moves.
Regards
Reini
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