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Viktor Gavrikov vs Alvis Vitolinsh
URS Ch sf (1982), Severodonetsk
Nimzo-Indian Defense: Classical Variation. Vitolinsh-Adorjan Gambit (E32)  ·  0-1

ANALYSIS [x]

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sac: 25...Nxg4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Aug-25-11  LIFE Master AJ: This is a nice game ...

I think it is fair to say that Black has "comp" for his Pawn, he set up an aggressive position ... similar to a Benko Gambit.

It was up to White to refute this approach, here he failed miserably in that effort.

Dec-25-19
Premium Chessgames Member
  OhioChessFan: 23. fxe4 seems simple enough for White.
Dec-25-19
Premium Chessgames Member
  al wazir: I went for 25...Rxg4+ instead of 25...Nxg4. It doesn't quite work.
Dec-25-19  ndg2: ANALYSIS[x]27. Qxb7 Rxg4+ 28. Kh1 Qxh2+ 29. Kxh2 Rh4#
Dec-25-19  Walter Glattke: 25.-Nxg4 allows 26.-Qh4. 26.Qh5 Nf6+ wins, 26.Qxb7 Nxh2 27.Kf2 Rg2+ 28.Ke1 Qh4+ 29.Kd1 Qf2 mating
Dec-25-19
Premium Chessgames Member
  malt: Gone for 25...N:g4 26.fg4 R:g4+

and a Happy Xmas to all.

Dec-25-19
Premium Chessgames Member
  agb2002: Black is two pawns down.

White threatens Qxb7.

The first idea that comes to mind is 25... Nxg4:

A) 26.Qxb7 Nxh2+ 27.Kf2 (27.Kh1 Nxf1 28.Nf5 Rh6+ 29.Nxh6 Qh4#) 27... Rg2+ 28.Ke1 Qh4+ 29.Kd1 Nxf1 is crushing.

B) 26.fxg4 Qh4

B.1) 27.Rf2 Rxg4+ 28.Kf1 (28.Kh1 Rg1#) 28... Rg1+ 29.Ke2 Qxf2+ is winning (30.Kxf2 R8g2#).

B.2) 27.Rd1 Rxg4+ 28.Kf1 (28.Kh1 Qxh2+ 29.Kxh2 Rh4#) 28... Qxh2 wins.

B.3) 27.Rf4 Qe1+ 28.Qf1 (28.Rf1 Rxg4#) 28... Rxg4+ 29.Rxg4 Rxg4#.

B.4) 27.Nf3 Rxg4+ 28.Kh1 Bxf3+ 29.Rxf3 Rg1#.

B.5) 27.Rf3 Qe1+ 28.Qf1 (28.Rf1 Rxg4#) 28... Rxg4+ 29.Rg3 (29.Kh1 Qxf1#) 29... Rxg3+ 30.hxg3 Qxg3+ 31.Qg2 Qxg2#.

B.6) 27.Qxb7 Rxg4+ 28.Kh1 Qxh2+ 29.Kxh2 Rh4#.

B.7) 27.Rxf7 Qe1+ as in B.5.

B.8) 27.Nc6 Rxg4+ as in B.6.

B.9) 27.h3 Rxg4+ and mate next.

C) 26.Rf2 Nxh2+ and mate soon.

D) 26.Kh1 Nf2+ 27.Rxf2 Rg1#.

Dec-25-19  mel gibson: So easy.
That's 3 Monday puzzles in a row.

Stockfish 10 says mate in 11:

25... Nxg4

(25.
.. Nxg4 (♘f6xg4 ♕b5-h5 ♘g4-e5+ ♕h5xg6 ♖g8xg6+ ♔g1-f2 ♕d8-h4+ ♔f2-e2 ♖g6-g2+ ♔e2-d1 ♗b7xf3+ ♖f1xf3 ♕h4-e4 ♖f3-g3 ♕e4-d3+ ♔d1-e1 ♘e5-f3+ ♖g3xf3 ♖g2-g1+ ♔e1-f2 ♕d3-f1+) +M11/53 117)

Dec-25-19  stacase: Nice Wednesday Christmas present, all you have to do to open it, is to see that Whites King has an f2 escape route that needs to be sealed off before proceeding with the execution.

Merry Christmas everyone (-:

Dec-25-19  GlennOliver: 25...Rxg4+ (as mentioned by al wazir) also wins, albeit not as simply as the textual 25...Nxg4+.

Happy Christmas all.

Dec-25-19
Premium Chessgames Member
  thegoodanarchist: Alvis, he try harder
Alvis doesn't know a better way
Dec-25-19  saturn2: Black is better developed and can sacrifice 25...Nxg4

26.Qxb7Nxh2+27.Kf2Rg2+28.Ke1Qh4+29.Kd1- Nxf1exchange and strong attack

26.fxg4Qh427.Nf3Rxg4+28.Kh1Bxf3+29.Rxf- 3Qe1+30.Rf1Rg1+31.Rxg1Rxg1#

Dec-25-19  zb2cr: Okay, it looks like 25. ... Nxg4 does the trick. If White takes 26. fxg4, Qh4! seals off the escape route. <agb2002> has done impressive work in covering all the potential tries for White to make a flight square--my compliments. I only considered his lines B.2 and B.3.

If White plays 26. Qxb7, he sets himself up for a devastating discovered check 26. ... Nxh2+, with the Knight being immune from capture. White must flee, 27. Kf2, Qh4+; 28. Ke2, Rg2+; 29. Kd3, Nxf1. Black is up by the exchange and has an attack that looks crushing.

Dec-25-19
Premium Chessgames Member
  Jimfromprovidence: <OhioChessFan> said white had 23 fxe4.


click for larger view

Can black win from here?

Dec-25-19  RandomVisitor: Maybe 6...b6 or 6...d5 are better than what was played - 6...b5 7.cxb5 a6


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Stockfish_19121008_x64_modern:

<48/68 1:56:17 0.00 6...b6 7.Nf3 Bb7 8.e3 d5> 9.b3 Qe7 10.Bb2 Nbd7 11.Be2 c5 12.dxc5 Nxc5 13.0-0 Rac8 14.Rac1 Nce4 15.Qb4 Nc5 16.Qc3

48/76 1:56:17 +0.14 6...d5 7.e3 b6 8.Nf3 Bb7 9.b3 Nbd7 10.Be2 c5 11.0-0 Rc8 12.a4 cxd4 13.exd4 Qc7 14.Bb2 dxc4 15.bxc4 Nd5 16.cxd5 Qxc3 17.Bxc3 Rxc3 18.dxe6 fxe6 19.a5 Bd5 20.axb6 axb6 21.Rab1 Rf4 22.Rfd1 Rc2 23.Re1 Rc7 24.Rbd1 h6 25.Rd2 Nf6 26.Rb2 Bxf3 27.Bxf3 Rxd4 28.Rxb6 e5 29.Rbb1 e4 30.Bd1 Kf7 31.f3 Kg6 32.fxe4 Rxe4 33.Rxe4 Nxe4

Dec-25-19  RandomVisitor: By 17...g5 black has the advantage, so white should try something else earlier - perhaps 15.Bb4


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Stockfish_19121008_x64_modern:

<51/77 54:28 +1.70 15.Bb4 Nfe4 16.Bxc5 dxc5 17.Qxd8> Rfxd8 18.Ne5 Kf8 19.Rfc1 Ke7 20.Rc2 Bd5 21.Nc4 Bxc4 22.Bxc4 Rd2 23.Rxd2 Nxd2 24.Bb5 Ne4 25.Bd3 Nd2 26.Rd1 c4 27.Rxd2 cxd3 28.g4 Rc2 29.Rxd3 Rxb2 30.Rd4 Rb1+ 31.Kg2 h5 32.gxh5 Rb5 33.Rh4 Ra5 34.a4 Kf6 35.Kf3 Kg5 36.Rb4 Kf6 37.Rf4+ Ke7 38.Rh4 Kf6 39.h6 gxh6 40.Ke2 Ke7 41.Rb4 Rh5 42.h3 Kd6 43.Kd3 Kc6 44.h4 Kd6 45.Kc3 Rf5 46.f4 Rh5 47.Rc4

Dec-25-19
Premium Chessgames Member
  agb2002: <zb2cr> Thanks a lot!

<Jim> It looks like Black would have to settle for perpetual or move repetition. For example, 23... Rxg2+ 24.Qxg2 (24.Kh1 Bxe4 is probably too risky for White) 24... Rxg2+ 25.Kxg2 Qg5+ 26.Kf3 Qf6+ 27.Kg2 (27.Ke2 Ba6+) 27... Qg5+, etc.

Dec-25-19  King.Arthur.Brazil: I went wrong with 25...♖xg4+ 26.fxg4 ♘xg4... Merry X-max, friends. Nice to be with you one more year. Thank you so much!
Dec-25-19
Premium Chessgames Member
  patzer2: For today's Wednesday, Christmas day puzzle (25...?), I got the first move 25...Nxg5 -+.

However, after 26. fxg4, I missed the strongest follow-up 26...Qh4!, which, as <stacase> astutely observes, cuts off the White King's escape square. More importantly, 26...Qh4! forces mate in five moves or less.

Just for fun, I had Stockfish run 20 White replies to 26...Qh4! to see if I could find all the mates with the least number of moves. Since most of the mates after 26...Qh4 are four moves or less, it might be a good training exercise for novices.

My reply following 25...Nxg4 26. fxg4 was 26...Rxg4+ 27. Kf2 Qh4+ -+ (-7,42 @ 45 ply, Stockfish 10), which still wins but with more difficulty than after 26...Qh4! (mate-in-five, Stockfish 10).

P.S.: White's decisive mistake was 23. g4? allowing 23...R5g6 -+ (-5.56 @ 31 ply, Stockfish 10).

Instead of the passive 23. g4?, the bold 23. fxe4 Rxg2+ 24. Qxg2 Rxg2+ 25. Kxg2 = (0.00 @ 35 ply, Stockfish 10) gives White a level position.

Dec-25-19
Premium Chessgames Member
  patzer2: Earlier, instead of 17. Nd4 g5! 18. Qh3 g4 ∓ (-0.60 @ 30 ply, Stockfish 10), White could have secured the advantage with 17. Nd2! g5 18. Qh6 ± (+0.64 @ 34 ply, Stockfish 10).
Dec-25-19  RandomVisitor: <patzer2> ...yet a slightly longer run shows the 17.Nd2 line to be more even. You might be right on an even longer run...


click for larger view

Stockfish_19121008_x64_modern:

<49/73 12:42 0.00 17...g5 18.Qh6 Rxc1 19.Rfxc1 Nxd2> 20.Rc2 Nde4 21.a4 Kh8 22.f3 Ng8 23.Qh3 Nef6 24.Qg3 Nd5 25.Qe1 e5 26.Bc4 g4 27.fxg4 Qg5 28.Bxd5 Bxd5 29.e4 Qg6 30.Re2 Ba8 31.Rd1 Ne7 32.h3 Nc6 33.b4 Nd4 34.Rf2 Bxe4 35.b5 Bc2 36.Rxd4 exd4 37.Qb4 Qe4 38.b6 Kg8 39.b7 Rb8 40.Qxd6 Rxb7 41.Qd8+ Kg7 42.Qf6+ Kg8

Dec-25-19  Everett: 16.Bc1 looks terrible
Dec-25-19  RandomVisitor: <Everett>How about 16.Bd3 and getting rid of the black Ne4...?


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Stockfish_19121008_x64_modern:

<52/66 52:43 +0.89 16.Bd3 Rc5 17.Bxe4> Bxe4 18.Bc3 e5 19.Rfd1 Qb6 20.Nd2 Bb7 21.e4 Re8 22.Re1 h6 23.a4 Qc7 24.a5 Ba6 25.f4 Re6 26.f5 Re8 27.h3 Rb5 28.Qf2 Qb7 29.Qf3 Rc5 30.Rad1 Rec8 31.Kh2 Qc6 32.Qe3 Bb7 33.Ra1 Ba6 34.Qf2 Bb7 35.Kg1 Ba6 36.Rad1 Re8 37.Rc1 Rc8 38.Kh2 Qd7 39.Rcd1 Qc6 40.g4 Bb7 41.Qg3 d5 42.exd5 Rxd5 43.Bxe5 Rxa5

Dec-26-19
Premium Chessgames Member
  patzer2: <Random Visitor> Thanks for the deep analysis of the White improvements 15. Bb4! ± to +-, 16. Bd3 ± and 17. Nd2 =.

P.S.: I went over the game with my daughter last night, including your improvement 15. Bb4! I told her I greatly appreciate your deep analysis on chessgames.com. We especially enjoyed exploring your analysis of 15. Bb4!, and seeing how it improves the White position.

Dec-26-19  doubledrooks: After 25...Nxg4 26.Qxb7, 26...Qh4 seems like the quickest. Stockfish says it mates in 3.
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