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Danyyil Dvirnyy vs Alexey Shirov
"At Dvirnyy's End" (game of the day Sep-21-2020)
FIDE Online Olympiad (2020) (rapid), Chess.com, rd 4, Aug-15
Slav Defense: Quiet Variation. Schallopp Defense (D12)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Sep-17-20
Premium Chessgames Member
  carpovius: 26...Nxg4 move of the year!
Sep-17-20  RandomVisitor: If you put

ДАНИИЛ ДВИРНЫЙ

...into Google translate you get:

DANIEL DVIRNY

...a better transliteration.

Sep-17-20  gym: 24. Bxe4 is a draw by Stockfish.
Sep-17-20  Walter Glattke: I made a mistake above, I think for 26.-Nxg4 27.Bxe4, maybe a draw, too, no stockfish analysis for move 26 until yet.
Sep-17-20  RandomVisitor: With 20.h5! white gets the chance to attack


click for larger view

Stockfish_20091507_x64_modern:

<47/52 45:18 +2.29 20...g5 21.h6 g6 22.Ne2> Qc7 23.e4 Rc8 24.Bxc4 dxc4 25.Qc2 Kh7 26.b4 Nb8 27.Qb2 Nc6 28.Rc1 Ne8 29.f4 g4

47/69 45:18 +2.94 20...gxh5 21.Rh3 Qc7 22.g4 hxg4 23.fxg4 g5 24.Rgh1 Kg7 25.Bxc4 Qxc4 26.Qxc4 dxc4 27.e4 b4 28.Nd1 Nxg4 29.Ne3 Ndf6

Sep-17-20  TheBish: Shirov called White's bluff convincingly. Beautiful!
Sep-17-20  TheBish: I know I've seen a similar finish to this, just no idea what game that was.
Sep-17-20  RandomVisitor: 15.e4 is possibly better for white


click for larger view

Stockfish_20091507_x64_modern:

<50/66 1:57:22 +1.15 15.e4 dxe4 16.fxe4 e5 17.Bc4> 0-0 18.Nd5 Nxd5 19.Bxd5 exd4 20.Qxb7 Qxb7 21.Bxb7 Ra7 22.Bc6 Ne5 23.Bd5 g5 24.Rhf1 Rb8

49/72 1:57:22 +0.79 15.h4 b5 16.a4 0-0 17.a5 Qd6 18.Bd3 Rac8 19.Rc2 Nb8 20.Rhc1 Rc4 21.Nxb5 axb5 22.Qxb5 Rxc2 23.Rxc2 Qh2 24.Ka2 Qg1

Sep-17-20  TheaN: While it took me a while to see the text move (you look for something more flashy here but it's flashy enough) I did land on <26....Nxg4!> which exploits the queen side overload by relaying the play.

27.Bxc4 Nxd2+ 28.Ka2 Qb1# is somewhat obvious; 27.Qxg4 Nxd2+ 28.Ka2 (Ka1 leads to forced mate in the next line) Qxg4 -+ is also done swiftly, as 29.Rxg4 Rxc1 -+ threatening b3# and disaster.

So <27.Rxg4>. Here I should have taken some time, as I kind of tunnel visioned 27....Nxd2+?!, which is winning but unclear compared to the text, 28.Qxd2 Qxg4 29.Bxc4?! dxc4 -+, but after 29.Nb3! ∓ White surrenders the exchange with a somewhat playable position.

Of course <27....Qxg4! -+> as 28.Qxg4? Nxd2+ 29.Ka1 (Ka2 b3+ 30.Ka1 Rxc1+ 31.Rxc1 Rxc1#) Rxc1+ 30.Rxc1 Rxc1# 31.Ka2 b3#. Anything else keeps the attack alive with no compensation whatsoever, ie 28.Bxc4 still Rxc4! as 29.Qxg4 Nxd2+ 30.Ka1 b3! and mate's unavoidable. Brilliant.

Sep-17-20  RandomVisitor: 26...Nxg4!, nothing else there to play


click for larger view

Stockfish_20091507_x64_modern:

<53/68 1:00:02 -4.16 26...Nxg4 27.Qe2 Ngf2 28.Qxf2 Nxf2> 29.Bxf5 Nxh1 30.Bxe6 fxe6 31.Rxh1 Kf7 32.h5 gxh5 33.Rxh5 R4c7 34.Nb3 Kf6 35.Rh1 g6

53/68 1:00:02 +4.77 26...Nxd2+ 27.Qxd2 Ne4 28.Qg2 Qf6 29.Bxc4 Rxc4 30.Nb3 Bf8 31.h5 g5 32.Rc1 Nd6 33.Qf3 Qe7 34.fxg5 Qxg5 35.Qf4 Be7

Sep-17-20  mel gibson: There were too many possible lines
so I didn't know which to chose.

Stockfish 12 agrees with the first ply:

26... Nxg4

(26. .. Nxg4 (♘f6xg4 ♕d1-e2 ♘g4-f2 ♕e2xf2 ♘e4xf2 ♗d3xf5 ♘f2xh1 ♗f5xe6 f7xe6 ♖g1xh1 ♔g8-f7 ♖h1-g1 ♖c4-c2 ♘c1-b3 ♔f7-f6 ♖g1-g5 ♖c8-c7 h4-h5 g6xh5 ♖g5xh5 ♗e7-d6 ♖h5-h2 ♖c2-c4 ♔b1-a2 ♖c7-c8 ♖h2-h1 ♔f6-g6 ♖h1-g1+ ♔g6-f7 ♖g1-h1 ♖c4-c2 ♖h1-h5 ♔f7-f6 ♖h5-h1 ♗d6-e7 ♖h1-h2 ♖c2-c7 ♖h2-h5 ♗e7-d6 ♖h5-g5 g7-g6 ♖g5-g2 ♔f6-g7 ♖g2-h2 ♖c8-h8 ♖h2-e2 ♖h8-h1 ♘b3-c5 ♗d6xc5 d4xc5 ♖c7xc5) +4.24/40 63)

score for Black +4.24 depth 40

Sep-17-20
Premium Chessgames Member
  wtpy: Went down a couple of blind alleys last night but got the puzzle quickly this morning. Coffee is a wonderful thing. Shirov also missed a chance to improve with 20..Rd4, which seems to give him solid plus.
Sep-17-20
Premium Chessgames Member
  agb2002: Black has a bishop and a knight for the bishop pair.

White threatens gxf5 but not Bxc4 which would lose to Nc3+ or Nxd2+ and mate.

The white queen looks overburdened with the defense of the pawn on g4 and the bishop on d2. This suggests 26... Nxg4:

A) 27.Qxg4 Qxg4 28.Rxg4 Nxd2+ 29.Ka1 (29.Ka2 b3+ 30.Ka1 Ra4#) 29... Rxc1+ wins.

B) 27.Rxg4 Qxg4

B.1) 28.Qxg4 Nxd2+ 29.Ka1 Rxc1+ 30.Bb1 (30.Rxc1 Rxc1+ 31.Bb1 Rxb1+ 32.Ka2 b3#) 30... Rh1 31.b3 Rxb1+ 32.Rc2#.

B.2) 28.Bxc4 Nxd2+ 29.Qxd2 dxc4 wins a pawn with the better position.

C) 27.Bxe4 Qxe4+ and 28... Nf2 wins decisive material.

D) 27.b3 Rxc1+ 28.Bxc1 Ngf2 29.Qe2 Nxd3 wins decisive material (30.Qxd3 Nd2+).

Sep-17-20  Chris Bennington: So what am I missing? What is wrong with the simple 20.Bxc4?
Sep-17-20  mig55: Chris... mate after Nd2++
Sep-17-20  birimbombum: What a game!
Sep-17-20  Shrinarayanan: I don't see a good combination for black after 20. Bxc4 as Chris Bonington points out.
Sep-17-20  Brenin: <Chris>: Ignore <mig55>'s posting "mate after Nd2++": it refers to the response to 25 Bxc4 rather than 20 Bxc4, namely 25 ... Nxd2+ 26 Ka1 (or Ka2) Qb1# (25... Nc3+ leads to the same result). In fact, after 20 Bxc4 dxc4 21 Ne2 Qc7 (21 ... Qf2 22 Qd1 and 23 Qe1, or 21 ... Qd6 22 Qc2) 22 Rc1 Rc8 23 Qa2, White seems to be safe. Black has compensation for the exchange, but neither side seems to have a significant advantage. However, ignoring the R on c4, and developing a K-side attack with 20 h5, followed by Be1 and g4, looks like White's best plan.
Sep-17-20  messachess: Tricky one.
Sep-17-20  TheaN: <Chris Bennington: So what am I missing? What is wrong with the simple 20.Bxc4?>

To emphasize Brenin's post: nothing. But it effectively kills the position from White's point of view, dynamically Black has more play. After 20....dxc4 21.Ne2! Qc7 22.Qa2 =:


click for larger view

Black's controlling the position here. White has no play with his rooks. The problem for Black however is how to exploit this, which, effectively, he can't.

Sep-18-20
Premium Chessgames Member
  scutigera: Problemists may note that one possible finish is 30. Rxc1 Rxc1+ 31. Bb1 Rxb1+ 32. Ka2 b3#, a model mate.
Sep-21-20  Brenin: Hello, Danyyil and Alexey, nice to see you again! I haven't seen you both since last Thursday's entertaining POTD. I'm afraid I've nothing new to add to that conversation.
Sep-21-20
Premium Chessgames Member
  offramp: The pun is a good one and is based on the phrase <"At Journey's End"> which is a hotel in Florida, where chessgames.com is based.

https://www.atjourneysend.com/

They are probably just a few feet from each other.

Sep-21-20  Ironmanth: Nasty finish, "Fire on the Board"! Y'all stay safe out there in chessland.
May-23-21  e4Newman: this is insanely deep. how did he see this? bravo
search thread:   
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