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Kim S Commons vs Peicho Chonev Peev
"A Common Peeve: Bxg6!" (game of the day Jul-01-2015)
Plovdiv (1976), Plovdiv BUL, Aug-??
Sicilian Defense: Kan. Modern Variation (B42)  ·  1-0
ANALYSIS [x]

FEN COPIED

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sac: 19.Nxf7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Dec-12-16
Premium Chessgames Member
  patzer2: The first few move of yesterday's difficult Sunday puzzle (22. ?) seemed pretty obvious to me, with the demolition 22. Bxg6!+ Nxg6 23. f5! required to crack open the position and expose the Black King to attack.

However, as is typically the case with our Sunday puzzles, I found the follow-up very difficult.

Here's my look at the combination and a couple of side lines with the computer (Deep Fritz 15):

<22. Bxg6+ Nxg6 23. f5 Ndxe5>

23...exf5 24. Rxf5+ Kg7 25. e6 Nde5 26. Rexe5 dxe5 27. Rf7+ Kh8 28. Qxg6 Bxg2+ 29. Kg1 Bc5+ 30. bxc5 Be4 31. Rh7#) 24. fxe6+ Ke7 25. Qxg6 Kd8 (25... Nxg6 26. Rf7+ Kd8 27. Rd7#

<26. Rxe5 dxe5 27. Bxh6> Though this is winning, even stronger according to the computer is 27. Bg5+ hxg5 (27... Kc7 28. Rf7+ Be7 29. Bxe7 Bc6 30. Bd6+ Kxd6 31. Qd3+ Kxe6 32. Qg6#) 28. Qxg5+ Be7 29. Rd1+ Kc7 30. Qxe5+ Kc6 31. Qd5+ Kc7 32. Qd7#.

<27... Rxc4 28. Qxe8+ Kxe8 29. Rxf8+ Ke7 30. Rxb8 Bc6 31. Nd1 b5 32. Kg1 Kxe6 33. Rb6>

P.S.: As <Random Visitor>'s analysis with Komodo 10.1 indicates, Black could have improved and equalized earlier with 18...Nh5 = or 18...Bg7 =.

After the slightly inaccurate 18...h6?!, White secured a lasting initiative with the initial demolition sacrifice 19. Nxf7! to .

Black's decisive mistake appears to have been 20...Ng8?, allowing a second and decisive demolition sacrifice with 21. Qg4 Ne7 22. Bxg6! (+4.18 @ 20 depth, Deep Fritz 15).

Instead, as <Random Visitor>'s analysis with Komodo 10.1 indicates, 20...dxe5 21. fxe5 Nxe5 22. Qxe5 Qxe5 23. Rxe5 Rcd8 24. Re3 would have given Black practical counter chances.

Feb-10-19  devere: 19.Nxf7 and 20.e5 look obvious. After that it depends on what Black does. Probably best for Black is to give back the piece and trade Queens on e5. Then White has a slightly better position, but Black should be able to hold the Queenless middle game.
Feb-10-19
Premium Chessgames Member
  lost in space: I like this mate (with a little help form Black):

19. Nxf7 Kxf7 20. e5 Ng8 21. Qg4 Ne7 22. Bxg6+ Nxg6 23. f5 Nde5 24. fxe6+ Ke7 25. Qxg6! Nxg6? 26. Rf7+ Kd8 27. Rd7#


click for larger view

By the way, I do not find a convincing way how to win after 20...dxe5. 21. fxe5 (found nothing better) Nxe5 22. Qxe5 Qxe5 23. Rxe5 and Black is better, but it is not enough to claim a win.


click for larger view

Feb-10-19
Premium Chessgames Member
  ChessHigherCat: It's been a couple years since I've seen the game and I didn't remember the position but I came up with this:

19. Nxf7 Kxf7 20. e5 Ng8 21. Qg4 Ne7 22. f5 exf5 23. e6+ Kg8 24. Bxf5 Nxf5 25. Qxg6+ Ng7 26. Qf7+ Kh8 27. exd7 Rxe1 28. Rxe1 Rd8 29. Bxh6 Bc6 30. Bxg7+ Bxg7 31. Re7 Bxg2+ 32. Kg1 Rg8 33. Qh5+ Bh6 34. Qxh6#

I don't know how much I subconsciously remembered. Anyway, I completely agree with my comment from a few years back (says CHC2 to CHC1), Commons plays like a real GM. There's a lot of discussion of that point on his home page. GM Commons, I salute you, fantastic game!

Feb-10-19  Walter Glattke: 25.Qxg6 Nxg6? 26.Rf7+ Kd8 27.Rd7#
Option: 20.-Bxg2+ 21.Kxg2 Qa8+ 22.Kg1 h5 23.exf6 Nxf6 +-
Feb-10-19  SpamIAm: I'm wondering if 12...g6 was a wasted move. It doesn't really prevent an eventual f5 by white and in any case he can respond to f5 with ...Ne5.
Feb-10-19  Walter Glattke: 27.Bxh6 Bxh6? 28.Rd1+ e.g.Kc7 29.Qf7+ Kc6 30.Qd7# Lasts longer with Bd2, Qd6, Re7.
Feb-10-19  mel gibson: I didn't see the move but it's not surprising - Stockfish 10 sees less than a pawn in it but agrees with the first few moves:

19. Nxf7

(19. Nxf7
(♘g5xf7 ♔g8xf7 e4-e5 d6xe5 f4xe5 ♘d7xe5 ♕e2xe5 ♕b8xe5 ♖e1xe5 ♗f8-g7 ♘c3-a4 ♖c8-d8 ♖e5-e3 ♔f7-g8 h2-h3 e6-e5 ♗d2-c3 e5-e4 ♗d3-e2 ♖e8-e6 ♖f1-d1 ♖d8xd1+ ♗e2xd1 ♖e6-d6 ♗d1-c2 ♔g8-h7 ♔h1-g1 ♖d6-e6 ♗c2-b3 ♖e6-d6 c4-c5 b6xc5 ♘a4xc5 ♘f6-d5 ♘c5xb7 ♘d5xe3 ♘b7xd6 ♗g7xc3 ♘d6xe4 ♗c3-d4 ♔g1-h1 h6-h5 ♘e4-c5) +0.91/37 )

score for White +0.91 depth 37

Feb-10-19  BwanaVa: I remember this game for the quality but also for the circumstances. Commons went to Europe to play in 3 international tournaments in the Spring/Summer of 1976, scored great results, and rocketed to IM at a time when the US did not have a lot of titled players...and US Chess was in a chasm due (in part) to Fischer not defending in 1975. Commons results were-as they say-a tonic. RIP Kim Commons.
Feb-10-19  Ian McGarrett: After 27. Bxh6 if 27...Bxh6 then 28. Qf6+ Re7, 29. Rd1+ Ke8, 30. Qh8+ Bf8, 31. Qh5+
Feb-10-19
Premium Chessgames Member
  whiteshark: It's like watching a car crash in slow motion again.
Feb-10-19  RandomVisitor: After 19.Nxf7 Kxf7 20.e5, 20...Ng8 is not best.

If the game had continued <20...dxe5> 21.fxe5 Nxe5 22.Qxe5 Qxe5 23.Rxe5 black now has:


click for larger view

Stockfish_19020810_x64_modern: <9.5 hours computer time>

<56/78 +0.22 23...Bg7> 24.h3 Red8 25.Re3 Kg8 26.Na4 Nd7 27.Bc3 Bxc3 28.Nxc3 Ne5 29.Bb1 Nxc4 30.Rxe6 Rd6 31.Re7 Bc6 32.Rff7 Bxg2+ 33.Kxg2 Ne3+ 34.Rxe3 Kxf7 35.Kf1 Kg7 36.Ke2 Rd4 37.Ke1 Rdd8 38.Be4 Rc4 39.Bb7 a5 40.b5 Rcd4 41.Ne2 Ra4 42.Bc6 Rd6 43.Bf3 Rc4 44.Nc3 h5 45.Bd1 Rc5 46.Bc2 Rc8 47.Bb3 Rc5 48.a4 Rd7 49.Kf1 Rd4 50.Ne2 Rf5+ 51.Ke1 Rd6 52.Bc2 Rc5 53.Nc3 Rc4 54.Bb3

Feb-10-19  King Harvest: Good lord! Good Sunday.
Feb-10-19  King Harvest: In re: the pun... seems a bit pedestrian...

I prefer...

C'mmons, hurry up, I've got to peev.

Feb-10-19
Premium Chessgames Member
  agb2002: Recycled.
Feb-10-19  petemccabe: I'm not used to the pun providing a clue to the puzzle.
Feb-10-19
Premium Chessgames Member
  Jimfromprovidence: Just for the record, if after 27. Bxh6 then 27...Bxh6, there is 28.Qd3+, below, followed by mate in two moves.


click for larger view

Feb-10-19
Premium Chessgames Member
  offramp: The solution is brilliant. Well played Kim "Wikipedia" Commons.
Feb-10-19  5hrsolver: Fascinating problem. Just seeing this for the first time. I got the first two moves which doesn't count for much.
Feb-10-19
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4 <d 23 dpa done

1. + / - (0.80): 14.f5> Nc5 15.Bb1 gxf5 16.Nd5 Qd8 17.Nxe7+ Qxe7 18.Bg5 Rfd8 19.Bh4 Ncd7 20.exf5 e5 21.Rfd1 Qf8 22.Nf3 Rac8 23.Qe3 b5 24.Nd2 Re8 25.Be4 Nxe4 26.Nxe4 Bxe4 27.Qxe4 bxc4

2. = (0.21): 14.b4 Rfe8 15.Nb3 Rab8 16.a4 Nh5 17.Be3 Bf8 18.Qf2 Bg7 19.Rfd1 Ba8 20.Kg1 Rbc8 21.Rc2 Nhf6 22.Qg3 Nh5 23.Qf3 Qb7 24.g4 Nhf6 25.a5

Feb-10-19
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4 <d 22 dpa done

1. = (0.24): 13...Re8> 14.b4 Bf8 15.a4 Bg7 16.Nb3 Rb8 17.Be3 Bb7 18.Rfd1 Nh5 19.Kg1 Rbc8 20.Qf2 Ba8 21.Rd2 Nhf6 22.h3 Nh5 23.Bd4 Bxd4 24.Nxd4 Ndf6

2. + / = (0.36): 13...Bd8 14.Nf3 Bb7 15.b4 Rc8 16.Be3 Be7 17.Rfd1 Rfe8 18.h3 Bf8 19.Kh2 Bg7 20.Qf2 Nh5 21.Qd2 Nhf6 22.a3 Re7 23.Bd4 Nh5

3. + / = (0.47): 13...Rb8 14.b4 Re8 15.b5 Nc5 16.e5 Nh5 17.Nc6 axb5 18.Nxe7+ Qxe7 19.Nxb5 dxe5 20.fxe5 Bb7 21.Bc2 Red8 22.Nd6 f5 23.Rb1 Qh4 24.Qf2 Qxf2 25.Rxf2 Be4 26.Bg5 Rd7 27.Nxe4 Nxe4 28.Bxe4 fxe4 29.Kg1

Feb-10-19
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4 <d 21 dpa done

1. + / = (0.42): 13.e5> dxe5 14.fxe5 Nxe5 15.Bf4 Bd6 16.Ndb5 axb5 17.Nxb5 Qc5 18.Nxd6 Nxd3 19.Qxd3 Ng4 20.Qf3 e5 21.Qxa8 Qxd6 22.h3 exf4 23.hxg4 Bxg4 24.Qe4 g5 25.Rae1 Rd8 26.b3 Kg7 27.Qe7 Qxe7 28.Rxe7 Rd2 29.a3 Rd3 30.Re5 f6 31.Rb5 Bd1 32.Rxb6 Bxb3 33.c5 Bd5 34.a4

2. + / = (0.38): 13.Rae1 Bb7 14.f5 exf5 15.exf5 Ne5 16.Nf3 Nxf3 17.Rxf3 Rfe8 18.Re3 Bf8 19.Be4 Nxe4 20.Nxe4 Bxe4 21.Rxe4 Rxe4 22.Qxe4 Rc8 23.b3 Bg7 24.Rf1 Be5 25.a4 Qc6 26.Qxc6 Rxc6 27.g3 Kg7 28.Kg2 Bd4 29.a5 bxa5 30.fxg6 hxg6 31.Bxa5

3. = (0.22): 13.Rac1 Re8 14.b4 Bb7 15.Nb3 Bf8 16.a4 Rab8 17.a5 bxa5 18.Nxa5 Ba8 19.Na4 Red8 20.Bc3 Bh6 21.Rce1 Nh5 22.Qe3 e5 23.g3 Bg7 24.f5

Feb-10-19
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4 <d 22 dpa done

1. = (0.19): 12...Bb7> 13.b4 Rfe8 14.a4 Rab8 15.Nb3 h5 16.a5 h4 17.axb6 Qxb6 18.Rg1 h3 19.Na5 Ba8 20.Na4 Qc7 21.gxh3 Nf8 22.c5 Ng6 23.Qe3 Nd7 24.Rac1 dxc5 25.Nxc5 Nxc5 26.bxc5

2. = (0.23): 12...Nc5 13.Bc2 Bb7 14.b4 Ncd7 15.Bb3 Rac8 16.Rac1 Rfe8 17.f5 exf5 18.Nd5 Qd8 19.Nxf5 Bf8 20.Ng3 a5 21.a3 Nxd5 22.cxd5 Rxc1 23.Rxc1 axb4 24.axb4 g6 25.Be3 Bg7 26.Ba4 Qe7 27.Bc6

3. + / = (0.34): 12...Qc5 13.Be3 Qc7 14.b4 h6 15.Rac1 Bb7 16.h3 Rac8 17.a3 Rfe8 18.Rfd1 Bf8 19.Kh2 Be7 20.Rc2 Rf8 21.Kg1 Rce8 22.Qf2 Rc8 23.Qf3 Rfd8 24.Qe2 Rf8 25.Kh1 Rfe8 26.Kh2 Rf8

Feb-10-19
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4 d 21 dpa done

1. = (0.24): 12.a3 Bb7 13.b4 Rac8 14.Be3 h6 15.Rac1 Rfe8 16.h3 Nh7 17.Rfd1 Nhf8 18.Nf3 Bf6 19.Qd2 Red8 20.Kh2 Ng6 21.Be2 Ndf8 22.b5 a5

2. = (0.23): 12.b3 Bb7 13.Bb2 Rac8 14.Rad1 Rfe8 15.Bb1 h6 16.Rd2 Qc5 17.Rfd1 Rcd8 18.Bc2 Rf8 19.h3 Rc8 20.Qe3 Rfe8 21.Na4 Qc7 22.Nc3 Qc5 23.Na4

3. = (0.18): 12.Bd2 Bb7 13.b4 Rac8 14.Rac1 Rfe8 15.h3 g6 16.Kh2 Bf8 17.Be3 Bg7 18.a3 Nh5 19.g4 Nhf6 20.Nf3 Qd8 21.Kg2 h6 22.Qd2 e5 23.fxe5 Nxe5 24.Nxe5 dxe5

Feb-11-19  thisisasign: 25...Nxg6 26.Rf7+ Kd8 27.Rd7++. One of the prettiest mates I've ever seen.
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