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Wei Yi vs David Navara
"Navar take a sacrifice" (game of the day May-28-2022)
Tata Steel Masters (2016), Wijk aan Zee NED, rd 9, Jan-26
Spanish Game: Berlin Defense (C65)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Given 13 times; par: 47 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jan-28-16
Premium Chessgames Member
  perfidious: <moz> never trifles with proof for his assertions--just gives one move and that-a is that-a.
Jan-28-16
Premium Chessgames Member
  keypusher: <beatgiant: <Moszkowski012273: 23.Qh8+... was actually quite a bit stronger.> Can you give your reasons?>

Well, if he's like me, his reasons likely are that Stockfish on chessbomb rated 23.Qh8+ at about +10.5 and 23.Bh6 as about +3. Top Stockfish lines below:

<23.Qh8+ Kf7 24. Rxg7+ Bxg7 25. Nxe5+ Bxe5 26. Rh7+ Kg6 27. Rh6+ Kf7 28. Qxe5 Qh8 29. Qxc7+ Kg8 30. Rxh8+ Kxh8 31. Bxd4+ cxd4 32. Qe5+ Kh7 33. Qxe6 Rf8 34. f4 Kg7 35. Qd7+ Kg8 36. f5 Rf7 37. Qd8+ Kh7 38. Qxd4 a6 39. Kd2 b5>

<23.Bh6 Qe8 24. Bxg7 Qxh5 25. Bxf6+ Kf7 26. Rxh5 Ne2+ 27. Kd2 Nxg1 28. Bxe5 Nf3+ 29. Ke3 Kg6 30. Rh1 Bxc4 31. Kxf3 Bxa2 32. Ke3 Bg8 33. Rg1+ Kf7 34. Rg7+ Ke6 35. f4 Bf7 36. Bxc7 b6 37. f5+ Kf6 38. Be5+ Ke7 39. Rh7 Rg8 40. Bd6+ Kxd6 41. Rxf7 Rg2 42. c3 Rxb2 43. Rxa7>

Jan-28-16
Premium Chessgames Member
  perfidious: <keypusher> That poster is not at all like you; when he takes offence, he may well decide to indiscriminately deface the imagined offender's games with rubbish.
Jan-28-16
Premium Chessgames Member
  beatgiant: <keypusher>
Thanks. I visualized that as far is move 25 but missed those strong rook check zwischenzugs after that.
Jan-30-16  Moszkowski012273: I love when people sit and judge you from their computer screens, having never met or even talked to you, from thousands of miles away.... Shows a true maturity.
Jul-02-17  ChessHigherCat: keypusher: <beatgiant: <Moszkowski012273: 23.Qh8+... was actually quite a bit stronger.> Can you give your reasons?>

Well, if he's like me, his reasons likely are that Stockfish on chessbomb rated 23.Qh8+ at about +10.5 and 23.Bh6 as about +3. Top Stockfish lines below:

<23.Qh8+ Kf7 24. Rxg7+ Bxg7 25. Nxe5+ Bxe5 26. Rh7+ Kg6 27. Rh6+ Kf7 28. Qxe5 Qh8 29. Qxc7+>

But the rook is still on h6, so if 28...Qh8, then Rxh8

Jul-02-17
Premium Chessgames Member
  An Englishman: Good Evening: Given that this is a speculative sacrifice and not even White could have seen everything, not sure how much credit to claim for seeing variations only 3-4 moves long. I'll call it 6.5/7 for the week.
Jul-02-17
Premium Chessgames Member
  al wazir: The general idea of the attack was clear, but Black had a *lot* of alternatives.

I'm not sure if they any of them would have saved the defense, but 26...Rxd8 has to be better than 26...Ne2+, the move played. For example, 27. Rxh5 Ne2+ 28. Kd2 Nxg1 29. Ke3 Ke7 30. Rh1 Rg8 31. Nxe5 Rg2.

Black is two ♙s down, but that's better than being two ♙s and a piece down.

Jul-02-17  agb2002: This is one of my son's favourite games.
Jul-02-17  Walter Glattke: I propose an interference check with
22.-Rxg1+ 23.Rxg1+ Bg7 24.Bh6 Ne6
25.Nxe5 Qf6 26.Qe8+ Kh7
Jul-02-17  AlicesKnight: I'm with <al wazir> - the principle was clear but the coolness of the execution, including being unworried by the attack on the Q, is still beautiful, and the calmness of the last move rounds it off.
Jul-02-17  morfishine: Game is too well known

*****

Jul-02-17  john barleycorn: <morfishine: Game is too well known

*****>

oh, yes. and on what do you base your opinion?

Jul-02-17  malt: 23.Qh8+ looks good...Kf7 24.R:g7+ B:g7 25.N:e5+ B:e5 26.Rh7+ Kg6 27.Rh6+ Kf7 28.Q:e5 Qg8 29.Qh5+
Jul-02-17  RandomVisitor: 12...Nb8 takes the knight out of play on the kingside and requires another tempo for development on c6. Better would be 12...Nf8, perhaps in the line below followed by Ne6:


click for larger view

Stockfish_17061704_x64_modern: <34 minutes computer time>

<0.00/41 13.Nh4 Ne6> 14.Qe3 a5 15.Nf5 b5 16.Ncxd6 cxd6 17.Qg3 Ng5 18.Bxg5 hxg5 19.Qf3 Rf8 20.Ne3 Kh7 21.Kd2 Be6 22.a3 a4 23.Ke2 f6 24.g4 Qd7 25.Rb1 b4 26.Kf1 Rad8 27.Rd1 bxa3 28.bxa3 Rb8 29.Kg2 Rb2 30.Rb1 Ra2 31.Ra1 Rb2 32.Rab1

Jul-02-17  malt: From 29.Qh5+ Ke7 (29...Kf8 30.Q:c5+ )30.Q:c5+ Ke8 31.B:d4


click for larger view

Jul-02-17  DarthStapler: I got the first two moves and the general idea
Jul-02-17
Premium Chessgames Member
  scutigera: <beatgiant>: "Rook Check Zwischenzugs" would be a good name for a doo-wop band.
Jul-02-17  patzer2: <1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Bc5 5.Bxc6 dxc6 6.Nbd2 O-O 7.Nc4 Nd7 8.Qe2 Re8 9.Bd2 Bd6 10.h4 c5?!> Black's plan is to bring the Knight back to b8, and then to c6 with hope of landing on d4. Black gets his wish, but the plan appears to be too slow and winds up favoring White.

Better instead, IMO, is 10...Nf8 =(+0.06 @ 29 depth, Stockfish 8) as in the draw in the Super GM game Caruana vs Karjakin, 2016.

<11.h5 h6?!> IMO 11...Nf8 = is preferable for White.

<12.O-O-O Nb8?!> Better IMO is 12...Nf8 = to .

<13.Rdg1 Nc6?> Black's game takes a serious turn for the worse with this move. Better instead is 13...Bg4 14. Ne3 Qd7 15. Nxg4 Qxg4 to = (+0.30 @ 30 depth, Stockfish 8.)

<14.g4!> to (+1.38 @ 28 depth, Stockfish 8) With this move, White secures a strong and near winning advantage.

<14...f6 15.g5 fxg5 16.Nxg5!> to (+1.38 @ 29 depth, Stockfish 8) This strong demolition solves today's Sunday Jul 2, 2017 puzzle.

<16...Nd4 17.Qd1 hxg5> This allows White an immediate decisive advantage after 18. Bxg5! (+3.35 @ 28 depth, Stockfish 8.)

Instead, Black can put up more resistance with 17...b5 18.Nxd6 cxd6 to (+1.55 @ 30 depth, Stockfish 8.)

However, White appears to slowly but surely gains a decisive advantage after 17...b5 18. Nxd6.cxd6 19.Nf3 Re6 20.Nxd4 cxd4 21.f4 exf4 22.Bxf4 a5 23.Qd2 Kh7 24.Qf2 Qf8 25.Bg3 Qxf2 26.Bxf2 Ra7 27.Bxd4 Rf7 28.Rg2 g5 29.hxg6+ Rxg6 30.Rgh2 Bg4 31.b3 a4 32.Kd2 Rb7 33.Rb1 a3 34.Rf1 h5 35.b4 Rc7 36.c4 bxc4 37.b5 cxd3 38.Kxd3 d5 39.e5 Kh6 40.b6 Rb7 41.Rf4 Be6 42.Rhf2 Rg3+ 43.R2f3 Rxf3+ 44.Rxf3 Kh7 45.Rf4 Bh3 46.Rf6 Bc8 47.Rf8 Be6 48.Kc3 h4 49.Kb4 h3 50.Kc5 Kg7 51.Rf3 h2 52.Rf1 Rb8 53.Kd6 Bg4 54.e6+ Kg6 55.e7 Bh5 56.Rh1 Kf5 57.Rxh2 Bg6 58.Rh8 Be8 59.Kc7 Ra8 60.b7 (mate-in-nine to follow, Stockfish 8 @ 46 depth.)

<18.Bxg5! Be7 19.Be3 Bf6 20.h6 Re7> If 20...g5, White wins after 21.Bxg5 Bxg5+ 22.f4! when play might continue 22...Qf6 23.Qh5 Kh7 24.Rxg5 Be6 25.fxe5 Qf8 26.Rg7+ Kh8 27.Qg6 Bg8 28.h7 Qf4+ 29.Kb1 Be6 30.Rg8+ Rxg8 31.hxg8=Q#.

<21.hxg7 Rxg7 22.Qh5 Be6 23.Bh6> This wins, but even stronger is 23.Qh8+! Kf7 24.Rxg7+ Bxg7 25.Nxe5+! Bxe5 26.Rh7+ Kg6 27.Rh6+ Kf7 28.Qxe5 Qf8 29.Rh7+ Ke8 30.Bxd4 Qg8 31.Rg7 Qxg7 32.Qxg7 (+57.10 @ 31 depth, Stockfish 8)

<23...Bf7 24.Bxg7 Bxh5 25.Bxf6+ Kf8 26.Bxd8 Ne2+ 27.Kb1 Nxg1 28.Bxc7 1-0> With White about to go up a piece and two pawns, Black resigns.

Jul-10-17  morfishine: <john barleycorn> Anybody that follows chess seriously has been acquainted with <15.g5>

Obviously, you haven't, but thats ok

ignorance is not a hindrance

*****

Feb-25-19  Whitehat1963: Great puzzle-like finish after 23...Bf7.
May-28-22
Premium Chessgames Member
  Phony Benoni: Well, I suppose that's true if you're talking "sacrifice" in the Koltanowski sense ("If I win, it was a sacrifice; if I lose, it was a blunder"). No percentage in accepting that kind of sacrifice, unless you're going for Negative Immortality.

But if you take that to its logical conclusion, there is no such thing as a sacrifice. If it wins, what was sacrificed?.

Nah. Trust you own judgment. If you win, you win. If you lose, you've learned something. And it's certainly less painful to be able to blame a loss on your opponent's brilliancy rather than your own stupidity.

May-28-22  whiteshark: Here are some related quotes that come to mind:

I'll need to appear full of confidence if I'm to take advantage of him.

You can't ever win if you're always on the defensive, to win you have to attack.

May-28-22  goodevans: Ah, that well known saying. It reminds me of playing suicide chess as a kid when the exact opposite was the rule.

Great game, though, even if the pun is rather iffy.

Dec-21-23  Gaito: This is a very nice attacking game, and a perfect text-book example for the theme "attack against the castled King".

In the follwing position


click for larger view

Wei Yi played 23.Bh6, forcing a simple and straightforward win, even though there were perhaps some more complicated ways to force a quicker win that can be disclosed by the computer. Komodo 13 suggests 23.Qh8+ with a tremedously high evaluation (+17.01), e.g. 23...Kf7 24.Rxg7+! Bxg7 25.Nxe5+! Bxe5 26.Rh7+ Kg6 27.Rh6+ Kf7 28.Qxe5 Qe7 29.Qh5+ Kg7 30.Qg6+, and mate in two (diagram)


click for larger view

Nevertheless, a computer engine and a chess master's brain do not always work the same way: while the engine always selects the best or the quickest way to win, no matter how complicated; the human player, on the other hand will, as a rule, choose the simplest, safest and clearest way, no matter if it may take longer.

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