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Evgeny Ilgizovich Bareev vs Viktor Kupreichik
2nd Soviet Club Cup final A (1990), Podolsk URS, Mar-??
King's Indian Defense: Averbakh Variation (E73)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 5 OF 5 ·  Later Kibitzing>
Nov-18-20  Walter Glattke: saturn: 28.-N4h5 29.Qf8+ Kh7 30.Ng5+ Qxg5 31.Rxg5 Rc7 decisive material, I had 29.QxQ there
Nov-18-20  saturn2: <Walter Glattke> right
Nov-18-20
Premium Chessgames Member
  agb2002: White has a rook for a knight and a pawn.

Black threatens Rxg3.

The black queen is defenseless. Therefore, 28.Ne6:

A) 28... Nxe5 29.Qxd2 wins decisive material.

B) 28... fxe6 29.Rxg6+

B.1) 29... Nxg5 30.Qxd2 wins decisive material.

B.2) 29... Kf7 30.Rg7+ and mate in two.

C) 28... N6e8(h5) 29.Qf8+ Kh7 30.Ng5#.

D) 28... N4h5 29.Qf8+ Kh7 30.Ng5+ Qxg5 31.Rxg5 wins decisive material.

Nov-18-20
Premium Chessgames Member
  drollere: cute combination. i missed this one; i liked Ne6, as it threatens mate and reveals a pin on the N at f4, but i assumed black would reply with fxe6, as Nh5 is a quick kill for white.
Nov-18-20  Brenin: Nice swindle by White. After a while I got 28 Ne6, though I expected Black to give up the Q for survival with 28 ... Nxe6 29 Qxd2 Ne4, apparently the only line to avoid mate, rather than allow the quick mate with 28 ... N6h5. Playing 28 ... N4h5 only delays the mate a little longer after 29 Qf8+ Kh7 30 Qxf7+ Kh8 31 Rxg6.
Nov-18-20  Brenin: 27 ... Rxc3 was tempting, but greedy. Instead of the improvement 27 ... Qe2 28 Rg1 Rd8 29 Qh4 Rd1 30 h3 Kg7 suggested by SF, how about the forced line 30 ... Rxg1+ 31 Kxg1 Qe1+ 32 Kh2 Ne2 33 Nf3 Qxg3+ 34 Qxg3 Nxg3 35 Kxg3 Ne4+ 36 Kg4 (or h2) Nxc3 37 Nxe5 Nxa2, with what looks like a winnable endgame, K+N+3P vs K+N+2P, with a distant passed a-pawn?
Nov-18-20
Premium Chessgames Member
  chrisowen: Tahoofs ivowhiv ivowrev travgene ne6 honoron ivowrev adagios ivowrev ivowhiv noggins ivowhiv ivowrev tahoofs faithon ivowrev ivowhiv rumsvow mouthin quickgo gnawits waxedin jobbodge ivowrev jekyll crazyin palava its ahpoints ivowrev apostle vealons ivowrev potsdam cudsvow bigwax umvides nimbles ne6 honoron ivowrev adagios ivowrev ivowhiv noggins. Lovely qe2 finishy abbatoirs avowrev lonebag doeitly eviction 1 2 it ok ivowrev rxc3 fetchon abbatoirs travgene lavish agoodquid ivowrev doeitly ivowrev conkjav 10. Yellow vip ivowrev ne6 abbatoirs fetchon advance corrupt it I head off?
Nov-18-20
Premium Chessgames Member
  malt: Seen 28.Ne6 fe6
28...N4h5 29.Qf8+ Kh7 30.Ng5+ Q:g5 31.R:g5 )

29.R:g6+ N:g6 30.Q:g6+

(30.Q:d2 )

30...Kf8 31.Q:f6+ Ke8 32.Q:e6+ Kd8 33.Rf8+ Kc7 34.Rf7+ wins

Nov-18-20  Nullifidian: 28. ♘e6 threatening ♕g7#.

If the knight is captured with 28... ♙fxe6, then the g-pawn ceases to be defended, allowing 29. ♖xg6+. If you persist in not moving the knight because it hangs the queen, then the only other option is 29... ♔f7 30. ♖g7+ ♔e8/f8 31. ♕h8+ ♘g8 32. ♕xg8#. However, if black defends by playing 29... ♘xg6, then while 30 ♕xd2 is winning you can also ignore the queen and play 30. ♕g6+ and 31. ♕xf6+ whatever move black makes. You don't even have to worry about the weak back rank because with the black king so exposed you can keep on delivering checks until mate.

So it appears black's best defense is to bite the bullet and play 28... ♘xe6, allowing 29. ♕xd2. There's a fork with 29... ♘e4, but white is at such a material and positional advantage that it's even possible to sac the threatened rook with 30. ♖xg6+ and still win by following up with 31. ♕d7 intending ♕f7+. Otherwise, you can trade down to a won position with 30. ♕xc3 ♘xc3 31. ♖xc3, when your two rooks to black's knight will be clearly winning.

Nov-18-20  GlennOliver: If 28... fxe6 29.Rxg6+ Nxg6

White wins more quickly by turning down the capture of the Black Queen, and instead mopping up Black's Knights and also pe6 with check on each capture.

Nov-18-20  mel gibson: I was too lazy to work it out.

Stockfish 12 says that Black must lose its Queen:

28. Ne6

(28. Ne6 (♘g5-e6 ♘f4xe6 ♕h6xd2 ♘f6-e4 ♕d2xc3
♘e4xc3 ♖g3xc3 e5-e4 g2-g3 ♔g8-f8 ♔h1-g2 ♔f8-g7 ♖f1-e1 f7-f5 ♖e1-b1 ♔g7-f6 ♖c3-c6 ♔f6-e5 ♖c6xa6 ♘e6-c5 ♖b1-b5 ♔e5-d4 ♖a6xg6 ♘c5-d3 ♖b5xf5 ♘d3-e1+ ♔g2-h3 ♘e1-c2 ♖g6-d6+ ♔d4-e3 ♖d6-e6 ♘c2-d4 ♖e6xe4+ ♔e3xe4 ♖f5-f4+ ♔e4-d3) +10.95/33 69)

score for White +10.95 depth 33.

Nov-18-20  Cellist: I saw 28. Ne6 but was surprised by Black's response. I thought I would play 29. Qf8+ and then 30. Qxf7+ (overlooking mate-in-one), but the mating net is still there and my move would have taken just a bit longer to lead to mate.
Nov-18-20
Premium Chessgames Member
  WorstPlayerEver: Much harder than yesterday. That said, I focused on Black's hanging Queen, tried 28. Ne4 and then 28. Nh7 before ending up at 28. Ne6
Nov-18-20
Premium Chessgames Member
  gawain: I could see enough quickly to be confident that White had to try 28 Ne6 threatening mate at g7. The rest I did not work out in detail. I saw that after 28...gxe6 White would win via 29 Rxg6+. And I (eventually) saw that Black's queen is hanging so moves by the f4 knight lose, even though they are the best way for Black to prolong the game.
Nov-18-20  TheaN: I don't have much to add to my analysis 12 years ago. Except for the fact that I didn't today.

<TheaN: <<All who think Qxd2 after 29....Nxg6 is the best look at the above!!!>>> on '08-01-16.

And I'm applauding my former self for being thorough. SF confirms, after 28.Ne6 fxe6 29.Rxg6+ forces mate.

29....Kf7 30.Rg7+ #2 was a somewhat simple variation I missed initially twelve years ago.

The key is 29....Nxg6 30.Qxg6+!, rather than the simple Qxd2 which wins too, and White wins by mating over the back ranks. Today, I played Qxd2. Guess there is a difference in thoroughness going from early 20s to early 30s :>

Nov-18-20  King.Arthur.Brazil: I disagree from Stockfish... Firstly, 30.♘g5+ is not check-mate (#). Beyond this, Black still have {30...Qxg5 31.Rg5... Best is 30.♕x f7+ A. 30...♔h6 31. ♖xg6#, B. 30...♘g7 31. ♕xg7#, and C.30...♔h8 31. ♖xg6 ♖c8 32. ♘f8. Then, D. 32...♕c2 33. ♖h6+ ♘h7 34. Txh7+ ♕xh7 35. ♕xh7# or E. 32...a5 33. ♖g8+ ♘xg8 34. ♕h7#, or the best F.32...♖xf8 33. ♕xf8+ ♔h7 34. ♕f7+ ♔h8 35. ♖gxf6 ♘xf6 36. ♕xf6+ ♔h7 37. ♕e7+ ♔g6 38. ♕f7+ ♔g5 39. ♖f5+ ♔g4 40. ♕g6+ ♔h4 41. ♖h5# also in the last line ♔h6 39. ♖f6+ ♔g5 40. ♖f5+ ♔h6 (or ♔h4) 41. ♖h5#. Goodbye Black! lgs.
Nov-18-20  Brenin: <King.Arthur.Brazil>: Stockfish is occasionally wrong in evaluations, but not (in my experience) in recognising checkmate. Black played 28 ... N6h5, moving the N on f6, not f4, to h5, so after 29 Qf8+ Kh7, 30 Ng5 is indeed checkmate: 30 ... Qxg5 is not a legal move, as the N still sitting on f4 blocks the Q from taking the N on g5.
Nov-18-20  cormier: Jan-16-08 RandomVisitor: 28.Ne6 <fxe6> 29.Rxg6+ Nxg6 30.Qxg6+ Kf8 31.Qxf6+ Ke8 32.Qxe6+ Kd8 33.Rf8+ Kc7 34.Rf7+ Qd7 35.Rxd7+ Kb8 36.Qb6+ Ka8 37.Qa7# is a nice way to finish the game. The black king walks the width of the board.

Jan-16-08 RandomVisitor: better for white was 20.Rad1 Qb4 21.a3 Qf4 22.Qxf4 exf4 23.Nh3 or 23.Nd3 .

Nov-18-20
Premium Chessgames Member
  Jimfromprovidence: <landshark><This one blew me right out of my sneakers - I thought W was dead lost and looking at trying to hang on somehow with 28.Nf3??>

I think that black thought that as well by playing 27...Rxc3?, but white had the foresight to play 27 Kh1, first.

Here is the text position below after 27...Rxc3?


click for larger view

And now here is the same position <but with the white king still on g1>, with white to move. Look at the difference this makes in the outcome of the game because black's knight can now check on e2.


click for larger view

Nov-18-20  messachess: It's easy once you see the pin on the black queen.
Nov-18-20  Granny O Doul: <Stockfish is occasionally wrong in evaluations, but not (in my experience) in recognising checkmate.>

They sure have come a long way. I remember back in the 70s the computer would often play on even after its king was taken.

Nov-18-20
Premium Chessgames Member
  keypusher: <Granny O Doul: <Stockfish is occasionally wrong in evaluations, but not (in my experience) in recognising checkmate.> They sure have come a long way. I remember back in the 70s the computer would often play on even after its king was taken.>

So...it was invincible, right?

Nov-18-20
Premium Chessgames Member
  maytintan: <tanksnaps>
after 26......Ne2+, 27. Kh1 Rd8 ? white has 28. Rh3 and thats the end
Nov-18-20
Premium Chessgames Member
  thegoodanarchist: I found 28.Ne6 relatively easily, but completely missed black's reply.
Nov-18-20  Everett: < messachess: It's easy once you see the pin on the black queen.>

Yes, thatís certainly part of it. FWIW, a book called Imagination in Chess helped me immensely with seeing the most important aspects of any position. Seems you figured it out all on your own.

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