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Alexey Vyzmanavin vs Vadim Ruban
Chigorin Memorial-A (1989), Sochi URS, Sep-??
Queen's Gambit Declined: Orthodox Defense. Rubinstein Variation (D61)  ·  1-0

ANALYSIS [x]

FEN COPIED

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sac: 23.Ne4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Mar-08-08
Premium Chessgames Member
  johnlspouge: <<zb2cr> wrote: Computers are just idiots that count on their fingers. However, since they have a lot of fingers and count VERY fast, the end result can look like intelligent cogitation.>

So, <zb2cr>, how many fingers does a computer need to pass its Turing test? ;>)

Mar-08-08  wals: White to move and draw. A puzzle by Reti.


click for larger view

Mar-08-08
Premium Chessgames Member
  johnlspouge: <<wals> wrote: White to move and draw. A puzzle by Reti.>

I have seen Reti's puzzle before, but: Nice! (LB 1 RB 0, as usual for me.) It never ceases to amaze me how imperfect human memory is, and yet, one does manage to retain something.

"Education is what you have left over when you have forgotten everything you have learned." - Anonymous (according to 15-th edition Bartlett's Familiar Quotations)

Various internet sources attribute the quote to Albert Einstein and others, but who are you going to believe?

Mar-08-08
Premium Chessgames Member
  Breunor: goldfarbdj: GMNick: 21. Qg4, with threat of mate on both g7 and g8 -- black has no good way to defend both squares. Hence 20. ... Qd8, defending the back rank.

Thanks Goldfarbj, I couldn't figure this out either!

Mar-08-08  dzechiel: <wals: White to move and draw. A puzzle by Reti.>

When I have seen this puzzle it started like this with white to move and draw:


click for larger view

Mar-08-08  wals: <johnlspouge>
I just had a read re the Turing test. 2030 is set to be a prime date for AI. You mentioned you found your right brain late in life. Is it true that you are really an intelligent piece of machinery and are just learning to fantasise?
Mar-08-08
Premium Chessgames Member
  johnlspouge: <<wals> wrote: 2030 is set to be a prime date for AI.>

Is that when they plan to make the Bride of AI? (And you thought CG's puns were atrocious...)

<Is it true that you are really an intelligent piece of machinery and are just learning to fantasise?>

Whatever you do, please, please, don't ask me to divide by zero :)

Mar-08-08  DarthStapler: I didn't even see that
Mar-08-08  jperr75108: Interesting problem.
Mar-10-08
Premium Chessgames Member
  kevin86: Reti's problem is a perfect example of chess tactics: White needs to either shepherd his pawn home or stop black's. Black must stop white's pawn AND promote his own.

The need for black to perform two tasks while white needs only one is the trigger for white's miraculous save. Black must use two tempi to capture the c-pawn while white can get inside "the square" of the h-pawn.

Mar-10-08  012: Friday puzzle <44. ...?> Mar-07-08 P Enders vs Uhlmann, 1978
Nov-10-19  Cheapo by the Dozen: Finding the first move isn't too hard, by a process of elimination. White obviously needs to attack the somewhat stranded f6 rook, and anything involving pawn to h5 is likely to lose a tempo to the threat of a g5 queen pin. That doesn't leave a lot of alternatives.

But I went astray soon thereafter.

Nov-10-19
Premium Chessgames Member
  An Englishman: Good Evening: Couldn't solve it all the way to the end, but probably saw enough. Finished 5/7 this week; solved Saturday & Sunday, flubbed (badly) Thursday and Friday. Sigh.
Nov-10-19  mel gibson: I didn't see that.
Stockfish 10 agrees with the text:

23. Ne4

(23. Ne4 (♘c3-e4 f5xe4 ♕f4xe4+
♖f6-f5 ♘e5-g6 ♕f8-f7 ♘g6xe7 ♕f7xe7 ♖g1-e1 ♕e7-f7 ♕e4xe6 ♕f7xe6 ♖e1xe6 ♔h7-g7 ♖h1-g1+ ♔g7-f7 ♗c2xf5 ♘d7-f6 ♖e6-e5 ♗c8xf5 ♖e5xf5 ♖a8-f8 h4-h5 ♔f7-e6 ♖f5-f3 ♔e6-e7 ♖g1-g6 ♘f6xh5 ♖f3xf8 ♔e7xf8 ♖g6xh6 ♘h5-g7 ♔c1-c2 ♔f8-f7 ♔c2-c3 ♔f7-e7 ♖h6-h7 ♔e7-f6 ♔c3xc4 ♘g7-f5 ♔c4-c5 b7-b6+ ♔c5-d5 ♘f5-e7+ ♔d5-e4 ♔f6-e6 ♖h7-h8 ♔e6-d7 ♖h8-h6 ♘e7-g8 ♖h6-h7+ ♔d7-e6) +6.83/39 161)

score for White +6.83 depth 39

Nov-10-19  Carrots and Pizza: Above my pay grade.
Nov-10-19  stacase: 25.Ng6 I would have moved 25.Qg4 followed by Bxf5+ or Bxf5 depending on what Black did. Bishop for a Rook is a good deal in my book.
Nov-10-19  1stboard: I ( White ) would have played Rg2 followed by R(h)g1 doubling the rooks on the g file and waited it out.

Perhaps the text move Ne4 was better , but i did not see the continuation.

Nov-10-19
Premium Chessgames Member
  agb2002: White has a bishop and a knight for the bishop pair and a pawn.

White can resume the attack 23.Ne4 fxe4 (23... Nxe5 24.Nxf6+) 24.Qxe4+ Rf5 (24... Kh7 25.Qh7#) 25.Ng6 Qf7 (25... Nf6 26.Nxf8+) 26.Nxe7 Qxe7 (26... Nf6 27.Qg2 Qxe7? 28.Qg8#) 27.Re1, trying to exploit the double pin, lloks good for White. For example, 27... Qf7 (27... Kg6 28.Qxf5+ exf5 29.Rxe7) 28.Qxe6 Qxe6 29.Rxe6 Nf8 30.Bxf5+ Kg7 31.Re8.

Nov-10-19  laskereshevsky: The open G line and the pin of the ♙f5 by the ♗c2 to the ♔h7 suggest that could be something... the first idea was 23.♘g4 but after23...♖f7 what?!.... so after a while i saw 23.♕g3, and If Black do not take 23...♘xe5 the threat of ♘g6 won at least one piece thanks to the weakness of the last rank where white in many variations threat mate in g8... ( NO! NO! wait a moment!.. there is 23...♗d6.. Damn#&@%!... Ok, relax.. after 24.♙f4 white is still OK, and if take with ♗xe5 after ♙fxe5 there is the winnig manouvre ♘c3-e2-f4..)

So follow the main line: 23...♘xe5 24.♙dxe5 ♖f7 25.♕g6+ ♔h8 and now 26.♘e2 white is +- ( If 26...♗d7 27.♘f4! )

Instead, the Immediate 26.♕h5 looks suspect in view of 26...♖h7 27.♖g6 ♗d7 28.♖hg1 ♗e8

But i can see a forced mate or something like +8.00/9.00...

Lets see the solution
......

OK, Being stuck to 22,♕g3 i did not considered 23.♘e4 ♙fxe4 24.♕xe4 ♖f5 25.♘g6 ♕f7 26.♘xe7 ♕xe7, and now being a piece down the idea to remove the ♖ from the g line with 27.♖e1 did not pass through my mind for not even a Nanosecond !!...

The game line 1.Ne4 fxe4 2.Qxe4+ Rf5 3.Ng6 Qf7 4.Nxe7 Qxe7... is better then mine ♕g3

PS: Saw the (useless) line og ♘g4 trying to exploit the weakness of the pinned♙f5, but the idea of do the same from the other side in e4 with the other ♘ in c3 remained out of my sight..

Nov-10-19  laskereshevsky: "... but i CAN'T see..."
Nov-10-19  metroXmagnum85X: Why does black move 20...Qd8 instead of fxe4?
Nov-10-19  Gregor Fenrir: <metroXmagnum85X> 20...fxe4??? loses almost instantly to 21. Qg3 (White threatens 22. Qg7# and 22. Qg8#) Black can only delay the inevitable: 21...Qg5+ 22.Nxg5 hxg5 23.Qxg5 Rg6 24.Qxg6 Bg5+ 25.hxg5#
Nov-10-19  Walter Glattke: 23.Ng4 Rg6!? 24.h5 why not?
Nov-10-19  Honey Blend: I was thinking maybe 23. ♖g5 hxg5 24. hxg5+ ♔g8 25. gxf6 opens up the g and h-files to an attack.


click for larger view

Nov-12-19  patzer2: Though 23. Ne4! +- (+5.06 @ 32 ply, Stockfish 10) is the strongest solution to our most recent Sunday puzzle, White has six potential winning alternatives scoring above two pawns, including 23. Ba4 +- (+2.66 @ 32 ply), 23. Nf3 +- (+2.50 @ 32 ply), 23. Qg3 +- (+2.18 @ 32 ply), 23. Kb1 +- (+2.49 @ 31 ply) 23. Qg4 (+2.25 @ 31 ply) 23. Rg2 +- (+2.06 @ 31 ply).

P.S.: Black's game takes a near decisive turn for the worse in the opening with 10...h6? 11. Bxf6 Bxf6? 12. g4! ± to +- (+1.65 @ 38 ply, Stockfish 10).

Instead, 10...cxd4 11. Bxf6 gxf6 12. Bxg7+ Kg7 ⩲ (+0.34 @ 31 ply, Stockfish 10) gives Black good drawing chances.

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