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Viktor Korchnoi vs Juan Manuel Bellon Lopez
Lugano open (1986), Lugano SUI, Mar-??
English Opening: Anglo-Indian Defense. Romanishin Variation (A11)  ·  1-0



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find similar games 5 more Korchnoi/J M Bellon Lopez games
sac: 26.e4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Premium Chessgames Member
  al wazir: Why didn't black play 31...Ra2 ? That stops the a-♙ in its tracks.

If 32. Rc6, then black can play 32...Bd6, giving up the ♗ in exchange for both passers. It's true that black is a ♙ down, but white's job is harder now.

Premium Chessgames Member
  al wazir: My move was 26. Rfd1. White gains a tempo this way.

If 26...exd5 27. Nxd5 Bf8 (27...Qa7 28. c7), then 28. Nxc7 Rxd2 29. Rxd2 Rxd2 30. Nxe8 Rd8 31. c7 Rc8 32. a6 Bc5 38. a7 Bxa7 39. Nd6, winning.

Premium Chessgames Member
  beatgiant: <al wazir>
On 31...Ra2, White has <32. Ra1> and I don't see how Black can trade the Bishop for both passers.
Premium Chessgames Member
  An Englishman: Good Evening: Too tough for me. If 31...Ra2; perhaps White replies 32.Rfd1,Be7; 33.Rd7,Bf6 34.e5 and sooner or later the Bishop can no longer guard d8. But 31...Ra2; 32.Rfd1,Be7; 33.Rd7,Kf8; 34.Rcd1,Ke8 might hold. White must have something better than these lines, or else <al wazir> might have cooked this puzzle.
Premium Chessgames Member
  beatgiant: <al wazir>
On 26. Rfd1 exd5 27. Nxd5, why not simply <27...Rxd5>?
Premium Chessgames Member
  agb2002: White has a bishop, a knight and two pawns for the bishop pair.

Black threatens exd5.

The position of the white bishop suggests 26.e4 to get three pawns for the piece after 26... exd5 27.Nxd5 but I don't see a clear winning path.

Premium Chessgames Member
  al wazir: <beatgiant: On 31...Ra2, White has <32. Ra1> >. You may be right.

After 31...Ra2 32. Ra1 Ra3 33. Rxa3 Bxa3 34. a7 Bc5 35. Ra1 Bxa7 36. Rxa7 Kf8 38. Rb7 Ke7, black picks up the second passed ♙. But with the ♖s off the board white should win pretty easily.

Premium Chessgames Member
  al wazir: <beatgiant: On 26. Rfd1 exd5 27. Nxd5, why not simply <27...Rxd5>?> You're definitely right on that one. Thanks.
Premium Chessgames Member
  OhioChessFan: Agree with <al wazir> that 31...Ra2 was a better move and would have made White work a little more. But eventually White ends up a Pawn up on the Kingside, the Black h Pawn is weak, and the White King is closer to the action as the Black King has to capture the c7 Pawn-not to mention it's Korchnoi. I tried this a number of ways and White always has the win pretty much in hand.

Here's one try:
31...Ra2 32. Ra1 Rxa1 33. Rxa1 Bc5 34. a7 Bxa7 35. Rxa7 Kf8 36. e5 Ke7 37. f4

click for larger view

and the ideas I mentioned are already evident.

Premium Chessgames Member
  patzer2: Got the first move 26. e4! of today's Friday puzzle solution. However, on my second move (after 26...exd5?), I went astray with 27. exd5 = (0.00 @ 30 ply, Stockfish 10) which creates complications but is only good enough for equality.

Best is the game continuation 27. Nxd5! ± to +- (+2.25 @ 35 ply, Stockfish 10) when White must continue with precise follow-up to insure winning chances.

For example, if White plays 32. Ra1? (instead of 32. Rc4! +-), then 32...Bc5 ± (+0.92 @ 31 ply, Stockfish 10) gives Black drawing chances.

P.S.: So where did Black go wrong? Apparently, after 26. e4!, capturing the poisoned Bishop with 26...exd5?, which allows 27. Nxd5 ± to +-, is a big mistake.

Instead, after 26. e4!, it seems Black can keep it level with 26...Bg5! = (0.00 @ 33 ply, Stockfish 10).

Aug-16-19  MrCarciofo: Tomorrow's Botvinnik's birthday
Premium Chessgames Member
  webbing1947: I think if 31..., Ra2 then 32.Rc6 and 33 Rb1 going to b8
Premium Chessgames Member
  Peligroso Patzer: An interesting game, but not a good puzzle at all. Several of Black’s move choices were dubious, such as 26. … exd5? In response to the putative “key” move, 26. e4 (which was best in the position, but not clearly winning). After 26. … Bf8, White’s advantage is not decisive.

Also, at move 31, Black could have put up stronger resistance with 31. … Ra2, although by that time he was already probably losing.

Aug-16-19  saturn2: Got the first two moves enabling the c pawn to advance and to cut the black queen off the defence of Be7.
Aug-16-19  TheaN: It's obvious that this puzzle is more about 'solving the situation' rather than getting a full blown win. White's up the two very strong a- and c-pawns, but the pieces are astray, in fact, without the puzzle move White's dead lost.

This immediately suggests <26.e4!>. There's no real point in analyzing this, it's not winning, but it's also not losing; Black can't capture the bishop because 26....exd5 27.Nxd5 ± basically turns the tables. Apparently 26....Bg5! is the key here, putting pressure on White's pieces in another way, ensuring imbalanced equality.

I guess one important note is that a 'solve' would probably include the entire trade off leading to the queen side pawns vs a bishop which is in many cases won. It's tempting for Black to go this route, but he can't.

Aug-16-19  PaperBridge: I would definitely resign in this position. Either color.
Aug-16-19  Arlekhino: What if black plays 26. ... Bxc6 instead of 26. ... exd5?
Aug-16-19  petemccabe: Arkekhino: That's that I thought as I played through the game. Stockfish likes Bg5, but either way it seems exd5 was not the right move.
Aug-16-19  cormier: patzer2:

P.S.: So where did Black go wrong? Apparently, after 26. e4!, capturing the poisoned Bishop with 26...exd5?, which allows 27. Nxd5 ± to +-, is a big mistake.

Instead, after 26. e4!, it seems Black can keep it level with 26...Bg5! = (0.00 @ 33 ply, Stockfish 10).

Premium Chessgames Member
  Breunor: Oddly for me that I found this one quickly, I don't have a good record with Fridays. But I saw that getting the knight to d5 was the key to moving forward.

On the suggested moves, checking the computer:

Black's 31st:

1) +3.14 (29 ply) 31...Ra2 32.Ra1 Rxa1 33.Rxa1 Bc5 34.a7 Bxa7 35.Rxa7 Kf8 36.f4 Ke7 37.Kf2 Kd7 38.e5 Kc6 39.Ke3 Kb6 40.Ra2 Rxc7 41.Rb2+ Ka7 42.f5 Rc4 43.Kd3 Rc6 44.Kd4 g6 45.g4 gxf5 46.gxf5 Rc8 47.e6 fxe6 48.fxe6 h5

2) +3.68 (29 ply) 31...Ba3 32.Rc4 Bd6 33.Ra1 Be5 34.Raa4 Bxc7 35.a7 Rdd8 36.Rc1 Ba5 37.Rxc8 Rxc8 38.Rxa5 Ra8 39.Kg2 Kf8 40.f4 Ke7 41.Kf3 Kd7 42.e5 Kc7 43.f5 Kb7 44.Ra1 Kb6 45.e6 fxe6 46.fxe6 Rxa7 47.Rxa7 Kxa7

So Ra2 looks better than the game move, but it doesn't really change the overall situation.

on 26 .. Bxc6:

1) +2.32 (27 ply) 27.Qc3 exd5 28.exd5 Bf6 29.Qc5 h5 30.dxc6 Bd4 31.Qg5 Bxb6 32.axb6 Qxb6 33.Qe7 Qd4 34.c7 Rc8 35.Rfe1 Rf6 36.Rc2 Qd3 37.Rc5 Qd2 38.Qe3 Qxe3 39.Rxe3 Ra6 40.Re2 g6 41.Kg2 Kg7 42.Rd2

Aug-16-19  devere: There is no move other than 26.e4 to seriously consider, so White to play on move 26 is not a good problem.

On Black's 26th move it is a much better problem, with ...Bg5! 27.f4 Bf6! (inviting the pawn fork!) equalizing, and taking the poisoned White Bishop losing.

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