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P McEvan vs G Kito
ENG corr (1967) (correspondence), ?
King's Gambit: Accepted. Schallop Defense (C34)  ·  0-1



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jul-16-06  NeddieO: <gala.martin> after 12.Bxf4 there is a move that keeps Black in the hunt: g3 (if Bxg3 Nxg3 for mate). White is in a desparate situation to keep Qxh2# from happining...don't see where that can be avoided.
Jul-16-06  NeddieO: Honza Cervenka: <Isn't 15./Qxh4 mate?> It isn't mate. White can play 16.Bh3.

That's what I wasn't seeing. I kept looking over & over for a defender of the h4 square. thanks for pointing that out.

Jul-16-06  percyblakeney: If white had been forced to play 10. dxe5 after Nxe5 I think the puzzle would have been easy for a Sunday, from Bc5+ things aren't too complicated.
Premium Chessgames Member
  Honza Cervenka: <al wazir><1) Why didn't black play 8...gxf3 ?> It would be very risky if not bad. After 8...gxf3 9.Bxf3 Ng7 black Pawn d5 is falling and white gets terrible attack. In fact, even the first decision (10.Nxd5 or 10.Bxd5) would be quite pleasing choice for white.:-)
Jul-16-06  durnstein: <al wazir> I also wondered why not 8 ... gxf3.

But I think the answer probably is that it loses the Black pawn on f4, and puts Black in a very passive, underdeveloped position:


8 ..... gxf3
9 Bxf3 Ng7
10 Bxf4
and while Black has knight for two pawns in material, he is now behind on development and space.

Or, b) more aggressively:

8 ... gxf3
9 Bxf3 Ng3
10 hxg3 fxg3
11 Bxd5 Qh4
12 Bxf7+ Kd8
13 Qh5
and things don't look so bright for Black.

Jul-16-06  EmperorAtahualpa: Awesome puzzle! I was thinking of 9...Qh5, but now that I see the correct solution it's quite easy to see how it works. That was not the case yesterday, so I think Saturday's puzzle was actually harder.
Jul-16-06  dakgootje: Well i totally missed the moves and didnt have the first move in my candidates, so guess this was a rather bad sunday for me. If you see the solution it is quite clear but of course, as noted and calculated extensive above, white isnt forced to accept the sac
Jul-16-06  Alex S.: Saturday's was harder. I got this pretty quickly, to my surprise.
Jul-16-06  RandomVisitor: 22-ply analysis:
1: P McEvan - G Kito, corr ENG 1967

click for larger view

Analysis by Rybka 2.0 Beta 8 mp:

1. = (0.21): 10.Nb5 a6 11.dxe5 axb5 12.Bxg4 Bxg4 13.Qxg4 Ng7 14.Qxf4 Qd7 15.Nd3 Ne6 16.Qf5 h5

2. = (0.01): 10.Nd3 Nxd3 11.Bxg4 Bxg4 12.Qxg4 Nxc1 13.Qxh5 Bg7 14.Raxc1 Bxd4+ 15.Kh1 Bxc3 16.bxc3 Qd6

3. = (0.00): 10.Bb5+ c6 11.Qe2 Bg7 12.dxe5 Qb6+ 13.Kh1 cxb5 14.Nxd5 Qc6 15.Nf6+ Bxf6 16.exf6+ Be6

4. = (0.00): 10.Rf2 Qh4 11.g3 fxg3 12.hxg3 Qxg3+ 13.Rg2 Qh3 14.Nb5 Kd8 15.Bg5+ f6 16.Rh2 Qg3+

5. = (0.00): 10.Na4 f3 11.Nxf3 Nxf3+ 12.Bxf3 Rg8 13.Re1+ Be7 14.Be2 Qd6 15.c4 a6 16.cxd5 Nf4

6. ³ (-0.27): 10.a3 c6 11.Nd3 Nxd3 12.Bxg4 Qh4 13.Bxc8 Rxc8 14.Qxd3 Bd6 15.Ne2 Rg8 16.Qf5 Qg4

(, 16.07.2006)

Jul-16-06  gala.martin: <RandomVisitor> Thank you. It seems today's puzzle was wrong! Can I also ask you:

-how long did rybka 2.0 take to provide this sharp 22ply analysis?

-beta 8 mp means that your are using a beta8 version for mp, or that your computer has an 8=4x2 cores CPU(s)?

Jul-16-06  RandomVisitor: <gala.martin>The 22-ply search took over 6 hours on my second computer, which is a single-core Athlon 3700+ 2.4GHz with 2GB memory. I picked up this processor on e-bay (!).

My other computer (dual core Pentium D 3.2GHz 4GB memory) is engaged in doing other analysis (see the RandomVisitor chess forum).

The beta 8 just means that it was the 8th release of Rybka 2.0 beta software.

Jul-16-06  patzer2: <gala.martin> <It seems today's puzzle was wrong!> Welcome to Initially, all the puzzles here were intended to have "winning solutions." However, to make the puzzles more like a game, where most position are not a forced win, a decision was made to occasionally include puzzles with other possibilities (e.g. forced draws, spoilers, defensive combinations etc.).

In this case, I don't know that the puzzle was intended to be a spoiler which can be defended by declining the sacrifice. However, I found it to be an instructive combination in learning to defend against positional sacrifices.

As it turns out, Black's Tal-like sacrifice 9...Nxe5! leads to a forced win if White accepts it and an even position if White correctly declines it. Seems to me it's a sound strategy, and a good study in a position more likely to occur in an actual game (i.e. as opposed to a forced win). So, at least for me, today's puzzle was not wrong.

Jul-16-06  RandomVisitor: Accepting the sacrifice is not immediately fatal for white due to <Fezzik>'s 11.Rf2, but the position favors black:

9...Nxe5 10.dxe5 Bc5+ 11.Rf2 g3 12.Bxh5 gxf2+ 13.Kf1 fxe1=Q+ 14.Qxe1 Be6 1: P McEvan - G Kito, corr ENG 1967

click for larger view

Analysis by Rybka 2.0 Beta 8 mp:

1. µ (-0.94): 15.Bxf4 Qd7 16.Bf3 0-0-0 17.Rd1 d4 18.Ne4 Qb5+ 19.Be2 Qc6 20.Bf3 Bd5 21.Qe2 Kb8

2. µ (-0.99): 15.Ne2 Qe7 16.c3 0-0-0 17.Bxf4 Rhg8 18.Nd4 Bg4 19.Bxg4+ Rxg4 20.g3 Rg6 21.Qe2 Kb8

(, 16.07.2006)

Jul-16-06  LIFE Master AJ: A.) I got the solution ... first time I have gotten both Saturday AND Sunday ... in a very long time. (It seemed for months I always missed both days.)

B.) I saw the way to win, IF White accepted ... I had a hunch that White should probably decline it. (I saw no easy win in that line.)

Jul-16-06  maxxowar: Well I missed 12... Qg5! thinking about 12... fxg3 obviously missing 13 Rf6! too.
Jul-16-06  Fezzik: The fact that Black gains equality with absolutely the best play a computer can offer suggests that 9...Ne5 has to be right. There doesn't seem to be much better for Black anyway.

This was a correspondence game, so White could have set up the board and looked at what Black would play after 12.hg3.

I normally hate correspondence games when it comes to tactics because they are usually almost impossible to work out without shuffling pieces on a board. I think I would have played 10.de5 in an OTB game.

Jul-16-06  midknightblue: awesome game based on setting up a "greco's mate"
Jul-16-06  blingice: I thought maybe 9..g3. Oh well.
Jul-16-06  think: Interesting. I have played the knight sac in the KG before, but I usually see it in this move order:

e4 e5
f4 exf4
Nf3 g5
Bc4 g4

It looks even more unsound with the bishop on e2.

Jul-16-06  pawn52: Nice puzzle today. I saw the solution and the line like 4 seconds after I saw it, but I only analyzed the Kf2 portion of the line, which leads to mate. I wasn't paying much attention to the Kh1 portion of the line, which is the best way to go.
Jul-16-06  Longbrow: <The fact that Black gains equality with absolutely the best play a computer can offer suggests that 9...Ne5 has to be right.> Point taken.
Jul-16-06  Tariqov: <think>I don't have much understanding about the KG but it seems it is more sound here then the one you proposed because after Bxf3 and Bxd5(after Ng7) and the f4 pawn vanishes there will be a deadly attack to the king via open f file.
Jul-16-06  aazqua: I must be missing something. Is this a Wednesday puzzle? N*P is obvoius because it opens up the bishop check which forces the king in the corner and screams out for n-g3. What's the challenge here? WIth the king in the corner and the rook file over you bring the queen up and it's lights out. A Sunday puzzle shouldn't be obvious from move one on.
Jul-16-06  Chess Classics: I saw 9...Nxe5 and "chose" that as my move but I couldn't work out all the moves. Nice puzzle though! Time for a monday.


Premium Chessgames Member
  kevin86: Nice finish: reminds me of the famous Andersson-Lange game.
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