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Ivan Radulov vs Liuben D Spassov
Slanchev Bryag (1974), Slanchev Bryag BUL
Tarrasch Defense: Classical. Reti Variation (D34)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Given 7 times; par: 48 [what's this?]

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sac: 21...Nxg3 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
May-06-07
Premium Chessgames Member
  al wazir: I got 21...Nxg3 22. Ne4+ right away, because <CG> kindly tipped me off that there was a win for black -- and what else is there? But I didn't see the continuation. (I wasn't sure whether black should check with the ♕ or the ♗ on move 23.)

So, did I "get" the answer? No. I would not have risked sacrificing two pieces like this if I couldn't see a win or a very strong position coming out of it. In skittles, sure, but not in a serious game.

May-07-07
Premium Chessgames Member
  kevin86: A neat attack by black---clearing the white king side like a tornado----or a bottle of AJAX. lol
Jan-06-19  mel gibson: I saw the first move easily but not the rest.

Stockfish 10 says White should reply 22. Rf1-f2:

21... Nxg3

(21. .. Nxg3 (♘e4xg3 ♖f1-f2 ♗b4-e1 ♘b1-c3 ♖c8xc3 ♗b2xc3 ♗e1xf2 ♘d4-f5 ♕f6xf5 ♕d3xf5 ♘d6xf5 e2-e4 d5xe4 f3xe4 ♘g3xe4 ♗c3-e1 ♗f2-d4 ♖a1-c1 ♗d4-e5+ ♔h2-g1 ♗e5-b2 ♖c1-d1 ♗b2-d4+ ♔g1-h2 ♗d7-c6 h3-h4 ♗d4-e5+ ♔h2-g1 ♘f5-e3 ♗g2xe4 ♘e3xd1 ♗e4xc6 b7xc6 h4-h5 ♗e5-d4+ ♔g1-f1 ♘d1-c3 ♗e1xc3 ♗d4xc3 ♔f1-f2 ♖e8-e1 ♔f2-f3) +14.88/36 )

score for Black +14.88 depth 36

Jan-06-19  Walter Glattke: 22.fxe4 Bd6+ mating, after 24.-Ng5, White could play e.g. 25.Ne6 26.Bf6 27.Qd4 with litlte black advantage. Possible was 30.Rxh2 exd3++ 31.Kxd3 Bxh2 32.Nc3 Be5 decisive material. Ah, the clou is, after 38.-Rd8, the match resign position, we have got paralysis, white can play Ra1-b1-a1, and black e.g. h5-h4-h3, 39.Bc1 h5 40.Kc2 Qf5+ 41.Kd1 Qg5 42.Rg1 Rxd2+ 43.Ke1 Rxe2++ 44.Kxe2 Qxg1 45.Bb2, jet even the simplification Qxa1! 46.Bxa1 g5 would win.
Jan-06-19  Walter Glattke: *correction: 25.Ne6 Bxe6
Jan-06-19  Walter Glattke: 25.Ne6 Bxe6 26.Qd4
Jan-06-19
Premium Chessgames Member
  OrangeTulip: what happened to kevin86? After 14 years of activity he suddenly remained silent. That is the downside of this modern difital era. You think you are a community, but it will never be a genuine one
Jan-06-19
Premium Chessgames Member
  OrangeTulip: Spot the typo
Jan-06-19
Premium Chessgames Member
  morfishine: <OrangeTulip> Not too diffitult to find
Jan-06-19  ChessHigherCat: <orangetulip> Whaf tyfo?
Jan-06-19  jayfreeman: <iccsumant: Did black do this after calculating everything or just thought that he had an advantage and just played some moves desperately trying to do something good?>

It is impossible to calculate all the lines here, but it is not always necessary in this kind of positions. If you can evaluate the position correctly, you don't have to calculate everything. In this game the white king was in danger, many white pieces were almost locked at the queen side, so generally the position favoured black. But there is another thing here - i have got the first three moves right, but this is a puzzle, and would i dare to play this in real game? I don't really know. So you need to be able to take evaluated risks sometimes, after all you are playing another human, not a computer.

Jan-06-19  TheaN: Hah, could have gotten this one if I'd spent a bit more time after 22.Kxg3... missed the immediate mating setup with 22....Ne4+, after that it's relatively easy.

<iccsumant: Did black do this after calculating everything or just thought that he had an advantage and just played some moves desperately trying to do something good?>

Only Spassov can really answer this question, but an intriguing one anyway. Also, you seem to be on two thoughts when it comes to the game and combination: you say "Spassov thought he had the advantage" yet "moves desperately"? Doesn't rhyme, really.

Exactly <because> Spassov had the advantage he played what would be a position-increasing combination. I'd reckon he visioned at least 21....Nxg3 being crushing if not accepted, 22....Ne4+ possible due to mate and 24.Kg1 forced. Lets have a look:


click for larger view

Anyone with a keen chess eye looking at this position doesn't give a dime for the White position. If he does escape, Black screwed up. Queenside undeveloped with dark square incompetence as result with an inactive Bishop on g2. Black just has to solve the immediate problem (fxe4) and does so with 24....Ng5! and the rest plays from there.

With even becomes more apparent as Black's first 'error' seems to occur on move 25 where SF claims that 25....Qg3 (with 26.Qe2 Bd6 27.f4 Bxf4 28.Rxf4 Nxh3+ to follow) is better than 25....Bd6. Semantics, but it somewhat shows (not conclusive) that Black started to improvise from move 25 onward, but does so in a position that can hardly be lost.

Jan-06-19  1stboard: After black plays 24 ... Ng5 white does not have a ghost of a move ......
Jan-06-19  Socrates2: An instructive positional sacrifice !
Jan-06-19
Premium Chessgames Member
  dorsnikov: Well, I got the first two moves anyway. Sometimes the first moves are easier to find than the follow ups?
Jan-06-19  ZeroAlpha: I think I would have continued playing with 39.Bc1.
Jan-06-19  landshark: I had this one figured with 24...Bd6 instead of the game continuation ....Ng5 - and it looks at least as good:

24...Bd6 25. fxe4 Qh2+ 26. Kf2 dxe4 27. Qc3 e3+ 28. Ke1 Qxg2 and white's house is burning down. All these responses by White appear forced to me -

Jan-06-19
Premium Chessgames Member
  agb2002: White threatens fxe4 and the bishop on b2, although momentarily unprotected, x-rays the queen.

Black is fully prepared to attack against the white king starting with 21... Nxg3 22.Kxg3 (else drop a pawn with a much worse position) 22... Ne4+ 23.Kh2 (23.fxe4 Bd6+ and mate in two) 23... Qf4+ 24.Kg1 (24.Kh1 Bd6 and mate next) 24... Ng3:

A) 25.Rd1 Re3 wins decisive material (26.Ne6 Rxd3 27.Nxf4 Rxd1+ etc.).

B) 25.a3 Bc5 looks good for Black. For example, 26.b4 Bxd4+ 27.Bxd4 Qxd4+ 28.Qxd4 Nxe2+ and 29... Nxd4 - + [2p].

C) 25.Rf2 Be1 recovers some material while keeping the advantage.

Jan-06-19  cormier:


click for larger view

Analysis by Houdini 4 <d 22 dpa

1. = / + (-0.59): 17...Qb6> 18.Nc3 Nxb2 19.Nxd5 Nxd5 20.Bxb2 Nc3 21.Bxc3 Bxc3 22.Rb1 Qxd4 23.Qxd4 Bxd4 24.Rbd1 Rc4 25.e3 Bb5 26.exd4 Rc2 27.Rc1 Rd2 28.Rcd1 Rxa2 29.Ra1 Rc2 30.Rfb1 a6 31.Bxb7 Rxf2+ 32.Kg1 Rd2 33.Bxa6 Bc6 34.Bf1 Rxd4 35.Rd1 Rb4 36.Rdb1 Rxb1 37.Rxb1 Be4 38.Rb4 Re8 39.Kf2 Bd5 40.Bd3

2. = / + (-0.53): 17...Qe7 18.Nd2 Nd6 19.N2f3 Nde4 20.Bf4 Bd6 21.Bxd6 Qxd6 22.Kg1 b6 23.Rc1 Rc5 24.Qd3 Rfc8 25.Rcd1 h6 26.Qe3 a6 27.Nd2 Nxd2 28.Qxd2 Ne4 29.Qd3 Rc4 30.Bxe4 dxe4 31.Qxe4 Bxh3

Jan-06-19
Premium Chessgames Member
  agb2002: The text 24... Ng5 is far stronger than my 24... Ng3, according to Stockfish.

I saw 24... Bd6 25.fxe4 Qh2+ 26.Kf2 dxe4 27.Qe3 Bf4 but thought that the white rook still controlled f4, when the white king was on f2.

Jan-06-19  landshark: Of course in my line 27.Qc3 Black has ....RxQ winning. White is cooked in any case.
Jan-06-19  cormier:


click for larger view

Analysis by Houdini 4 <d 24 dpa done

1. = (-0.17): 17.Nxd5> Nxd5 18.Bxd5 Bxh3 19.Bxb7 Bxf1 20.Bxc8 Bxe2 21.Qxe2 Qxc8 22.Bf4 Re8 23.Qf3 Ne5 24.Bxe5 Rxe5 25.Rd1 Bf8 26.Kg2 g6 27.b3 Rh5 28.Rh1 Rxh1 29.Kxh1 Qa6 30.a4 Bc5 31.Ne2 Qd6 32.Kg2 h6 33.Nf4 Qd4 34.Nd5 Kg7 35.Ne3 Qd2 36.Nc4 Qe1

2. = (-0.22): 17.Qb3 Qa5 18.Bf4 Bxc3 19.Qxc3 Qxc3 20.bxc3 Ne4 21.Rac1 Nb6 22.Rc2 Rfe8 23.Bxe4 dxe4 24.Rd1 Nc4 25.Rcc1 h6 26.g4 e3 27.f3 Ba4 28.Rg1 Nb6 29.Bd6 Red8 30.Be5 Rc5

3. = / + (-0.38): 17.Qd3 Ne5 18.Qd1 Bxc3 19.bxc3 Re8 20.Rb1 b6 21.Nb5 Bf5 22.Rb4 Qd7 23.Bg5 a5 24.Rf4 Ne4 25.Bxe4 Bxe4 26.Rxe4 Qxb5 27.Rd4 Rc5 28.a4 Qc6 29.Bf4 f6 30.Qb3 Nc4 31.Qc2 b5 32.axb5 Rxb5 33.Qd3

Jan-06-19
Premium Chessgames Member
  patzer2: The demolition 21...Nxg3! -+ (-13.14 @ 31 ply, Stockfish 10) is the strongest possible solution to today's difficult Sunday puzzle.

However, there's an easier solution available with the mundane 21...Nc5 -+ (-4.30 @ 30 ply, Stockfish 10) when play might go 21...Nc5 22. Qd1 Ne3 23. e3 Nf5 24. Nxf5 Qxb2 -+ (-7.43 @ 31 ply, Stockfish 10).

P.S.: Black's decisive error appears to be 20. Qd3? Rfe8! -+ (-2.64 @ 33 ply, Stockfish 10).

Instead, the defensive maneuver 20. e3 Rfe8 21. a3 Ba5 22. Ra2 Qh6 23. Ba1 Bb6 ∓ (-1.21 @ 31 ply, Stockfish 10) gives Black practical drawing chances.

Earlier, instead of 16. Kh2 Bb4 =, White could have maintained the advantage with 16. e3 ⩲ to ± (+0.65 @ 31 ply, Stockfish 10).

Jan-07-19
Premium Chessgames Member
  boringplayer: What an amazing idea by Spassov.
Jan-08-19
Premium Chessgames Member
  Retireborn: I remember trying to track down some information about this Bulgarian tournament and failing dismally. I did discover that the name literally means Sunny Beach though!
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