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Main
Date: 23 Jul 2005 06:18:27
From: Ron
Subject: A nice tactic...
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I'm sure computers will find this relatively quickly.
r1b2rk1/3pnpp1/p1n1p2p/1p2P3/5B2/3BQN2/q4PPP/2RR2K1 w - -
White to play and win.
Solution below:
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1. Bxh6! gxh6 2.Qxh6 Nf5 3.Bxf5 exf5
Nothing special so far. Black's defensive idea: the queen now guards
f7, so after 4.Ng5 Re8 5.Qh7+ Kf8 the king has enough breathing room and
white only gets a draw.
4.e6! Ne5
The psychologically difficult Qxe6 is the best defense, after which
black would have two pieces and two connected queenside passers for the
queen.
5.e7!
To be fair, exf7 also wins (since 5.ef+ Nxf7 6.Qg6+ Kf8 7.Nh6+ Ke7 Qf6+
mates, black is forced to give up the queen). The text, however, forces
mate.
I find the second consecutive blockading sacrifice of the pawn to be
rather pretty. Now black can delay mate for a few moves with 5. ...
Qxf2+ 6.Kh1 (Kxf2?? Ng4+!) Qxg2+ 7.Kxg2 Bb7+ etc but sooner or later the
mate threat forces:
5. ... Rxe7 6.Qh7+ Kf8 7.Qf8 mate.
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Date: 28 Jul 2005 15:53:48
From:
Subject: Re: A nice tactic...
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Ah, like a player of morphy's time, grab all material and get mated.
"Hrrrm, I can take his queen, but then I get mated, well, at least I
can say I was up a whole queen!!!!!!!!!!!!!"
Ron wrote:
> Ooh. Thanks for pointing that out. I never even considered that he
> might decline the sacrifice.
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Date: 23 Jul 2005 12:51:57
From: Bob
Subject: Re: A nice tactic...
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Ron wrote:
>
> I'm sure computers will find this relatively quickly.
>
> r1b2rk1/3pnpp1/p1n1p2p/1p2P3/5B2/3BQN2/q4PPP/2RR2K1 w - -
>
> White to play and win.
>
> Solution below:
> .
> .
>
> 1. Bxh6! gxh6
The starting postition is nice with almost all of whites pieces poised
to strike kingside. The Bishop "sack" on h6 seems obvious but Black has
a pretty sound position if he ignores it.
(1 ... Ng6 2. h4 Qb2 3. h5 Nxe5 or 1 ... f5 2. exf6 Rxf6 3. Nf5 for
example)
> 2.Qxh6 Nf5 3.Bxf5 exf5
>
> Nothing special so far. Black's defensive idea: the queen now guards
> f7, so after 4.Ng5 Re8 5.Qh7+ Kf8 the king has enough breathing room
> and white only gets a draw.
>
You missed a nice finesse with the knight and f6 -- Ng5 leads to mate!
( 4. Ng5 Re8 5. Nh7 Re6 6. Nf6+ Rxf6 7. exf6 and then Qg7#)
or
( 4. Ng5 Rd8 5. Nh7 f6 6. Qg6+ Kh8 7. Nxf6 Qf7 8. Qh6+ Qh7 9 Qxh7# )
> 4.e6! Ne5
>
> The psychologically difficult Qxe6 is the best defense, after which
> black would have two pieces and two connected queenside passers for
> the queen.
>
and white's queen!?
I'm not sure why Qxe6 is "psychologically difficult". In a sharp
position, simplifying the position is often the best defense. In this
case its even winning. So 4. e6 is a bad move. Better are :
4. Ng5!! (see above)
4 Rd6! forcing black to give up his knight to delay mate, which comes
anyway.
or even 4. Qg5+ traping the king against the side of the board with
threats of Rd6, Rd3
> 5.e7!
>
> To be fair, exf7 also wins (since 5.ef+ Nxf7 6.Qg6+ Kf8
umm isn't Black's rook on f8? And how does white's knight get to h6
from it's starting position of f3?
>7.Nh6+ Ke7
> Qf6+ mates, black is forced to give up the queen). The text,
> however, forces mate.
Lots of winning moves here but 5. ef+ is not one of them.
After 5 ... Qxf7 and black may eventually lose but he is in much better
shape than after
5. Ng5 (best) or 5. e7
>
> I find the second consecutive blockading sacrifice of the pawn to be
> rather pretty. Now black can delay mate for a few moves with 5. ...
> Qxf2+ 6.Kh1 (Kxf2?? Ng4+!) Qxg2+ 7.Kxg2 Bb7+ etc but sooner or later
> the mate threat forces:
>
> 5. ... Rxe7 6.Qh7+ Kf8 7.Qf8 mate.
The Qxf2 line can avoid mate 5. ... Qxf2+ 6. Kh1 Bb7
7. exf8=Q+ Rxf8 but after Rd2 black will have to retreat his queen and
renew mate threats or trade it for the rook.
Back to the beginning, Something subtle like 1. Be5 with traping
trheats on the black queen seems best to me, but white's advantage is
slight.
Bob
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Date: 25 Jul 2005 23:11:32
From: Ron
Subject: Re: A nice tactic...
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In article <[email protected] >,
"Bob" <[email protected] > wrote:
> The starting postition is nice with almost all of whites pieces poised
> to strike kingside. The Bishop "sack" on h6 seems obvious but Black has
> a pretty sound position if he ignores it.
>
> (1 ... Ng6 2. h4 Qb2 3. h5 Nxe5 or 1 ... f5 2. exf6 Rxf6 3. Nf5 for
> example)
Ooh. Thanks for pointing that out. I never even considered that he
might decline the sacrifice.
On the plus side, neither did he. I guess he felt the Nf5 idea was a
sufficient defense.
Thanks for the other comments, as well. I'll look at the position again.
-Ron
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Date: 23 Jul 2005 13:15:03
From: David Richerby
Subject: Re: A nice tactic...
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Ron <[email protected] > wrote:
> I'm sure computers will find this relatively quickly.
>
> r1b2rk1/3pnpp1/p1n1p2p/1p2P3/5B2/3BQN2/q4PPP/2RR2K1 w - -
>
> White to play and win.
>
> 1. Bxh6! gxh6 2.Qxh6 Nf5 3.Bxf5 exf5 4.e6! Ne5 5.e7! Rxe7
Rxe7 isn't legal here -- the Black rooks are on a8 and f8.
Dave.
--
David Richerby Disposable Addictive Bulb (TM): it's
www.chiark.greenend.org.uk/~davidr/ like a light bulb but you can never
put it down and you never have to
clean it!
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Date: 23 Jul 2005 06:21:06
From: Ron
Subject: Re: A nice tactic...
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In article
<ronaldinho_m-8607BA.23182722072005@newssvr21-ext.news.prodigy.com >,
Ron <[email protected] > wrote:
> the second consecutive blockading sacrifice
Okay, don't shoot me. The moment I wrote this I realize that the first
one is really an interference sacrifice, and the second one a decoy
sacrifice.
It's still a nice move. :)
-Ron
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