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Tigran Levonovich Petrosian vs Georg Halvax
25th Abu Dhabi International Chess Fest (2018), Abu Dhabi UAE, rd 4, Aug-11
Pirc Defense: Austrian Attack. Dragon Formation (B09)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Aug-01-20
Premium Chessgames Member
  al wazir: After 21...Qe2+ 22. Ka3 Qxd1 23. Qxd1, material is even and black isn't obviously lost.
Aug-01-20  newzild: <al wazir> Interesting try - though I think White is better after 21...Qe2+ 22. Kc1 Qxd1+ 23. Kxd1 because of some unpleasant threats such as 24. Qe5.
Aug-01-20  mel gibson: I didn't see it but I should have.

Stockfish 11 says:

18. Nxd6+

(18. Nxd6+
(♘b5xd6+ e7xd6 ♕d1xd6 ♘b8-c6 ♖h1-d1 ♘c6-d4 c3xd4 ♘e3xd1+ ♖c1xd1 ♕e4-e2+ ♔b2-c1 c5-c4 ♘e6-c7+ ♔e8-f7 ♕d6-d5+ ♔f7-f6 ♕d5-d7 ♕e2-e3+ ♔c1-b2 ♕e3-e2+ ♔b2-c3 ♕e2-e3+ ♔c3-b4 ♕e3-e7+ ♕d7xe7+ ♔f6xe7 ♘c7xa8 ♖h8xa8 ♖d1-e1+ ♔e7-d7 b3xc4 ♖a8-f8 g2-g3 ♖f8-f6 c4-c5 b7-b6 ♔b4-b5 b6xc5 d4xc5 h7-h6 h2-h4 g6-g5 f4xg5 h6xg5 h4xg5 ♖f6-g6 ♖e1-e5 ♔d7-c8 ♖e5-f5 ♔c8-d7 ♔b5-c4 ♖g6-a6 ♔c4-d5 ♖a6-g6 ♔d5-e5 ♔d7-e7 a2-a4 ♔e7-d7 ♔e5-f4 ♖g6-a6 ♖f5-d5+ ♔d7-e7 a4-a5 ♖a6xa5 ♖d5-e5+ ♔e7-f7 c5-c6 ♖a5-a4+ ♖e5-e4 ♖a4-a6 ♖e4-c4 ♖a6-a3) +5.11/40 361)

score for White +5.11 Depth 40

Aug-01-20  Walter Glattke: A) After 18.Ned7+ Kd8 19.Qf3 Qxf3 20.gxf3 Na6 21.Nxa8 Rxa8 22.Rce1 Ng2 white would have R for N and 2P, very small advantage or even draw. B) The complicated method with 18.Nxd6+exd6 (or NxQe4) 19.Qxd6 Nc6 20.Nc7+ Kf7 21.Nxa8 Rxa8 22.Rhe1 Qxg2+ 23.Ka1 Re8 and black wins. C) 19.-Nd7 loses for black D) 19.-Na6 20.Rhd1 Qc6 21.Qe5 Kf7 22.Rd6 wins for white. 22.-Qxg2+ 23.Ka1 Nc2+ 24.Rxc2 Qxc2 25.Qg7+ Ke8 26.Qd7# D2) 20.-Nxd1 21.Rxd1 Qc6 22.Qe5 Kf7 loses 23.Qg7+ Kxe6 24.Re1+ mating Al wazir: 21.-Qe2+ 22.Ka3 Qxd1 23.Qxd1 Ke7 24.Qd6 b6 25.Qe5 Kd7 (Kf7 Ng5+) 26.Ng5 Nc7 27.Qg7+ won ending. White wins material.
Aug-01-20  Walter Glattke: Stockfish shows the better moves after B) 19.-Nc6, nice!
Aug-01-20
Premium Chessgames Member
  agb2002: White is a pawn down.

Black threatens Nxd1+.

White has Nbc7+ and Nxd6+.

In the case of 18.Nbc7+ Kd7 (18... Kf7 19.Ng5+ Kg7 20.Nxe4 wins decisive material) 19.Qd2 Qxg2 20.Qxg2 Nxg2 21.Rf1 (21.Nxa8 Kxe6 22.Nc7+ Kd7 23.Nb5 a6 24.Na3 Nxf4 and Black gets three pawns for the exchange) followed by Nxa8 but Black has two pawns for the exchange.

In the case of 18.Nxd6+:

A) 18... Kd7 19.Nxc5+ Kc6 20.Ndxe4 Nxd1+ 21.Rcxd1 wins a piece and a pawn.

B) 18... exd6 19.Qxd6 with the threats Nc7+, Rcd1 and Rhe1 looks very good for White.

Aug-01-20  Walter Glattke: Congrats to your analysis, 18.-Kd7 19.Nxe4 wins only 2 pawns, I see.
Aug-01-20  Brenin: It's hard to believe, but Tigran Petrosian played Mikhail Botvinnik in 1998: <M A Botvinnik vs T L Petrosian>.
Aug-01-20
Premium Chessgames Member
  Predrag3141: I don't know the middle initials so until I saw the date, I thought Petrosian came out of his shell for this one game.
Aug-01-20
Premium Chessgames Member
  Predrag3141: I expected the more obvious 20 Rhe1, with the idea of Ng5, and if 20 ... Nf5 21 Ng7+.

20 Rd1 is just as good if not better, though. Black must meet the threat of Qd7 by giving up his queen, ending up with momentary material equality, but a lost position: 20 Rd1 Nxd1+ 21 Rxd1 Qe2+ 22 Kc1 Qxd1+. I have little doubt that White's dominant queen and knight on the 6th rank will win back a rook in a few moves.

Aug-01-20  Cheapo by the Dozen: In a blitz game I'd likely have played the Nxd6+ on Spielmannesque faith. This is with Re1 in mind, not Rd1.
Aug-01-20  Cheapo by the Dozen: Black was well and truly busted once he declined to play ... Qxg2+ to get his queen out of the line of fire (and to play it before Rc2 was possible as a forcing reply). Note that ... Kd7 and Kf7 both run into forks as long as the queen is on e4
Aug-01-20
Premium Chessgames Member
  chrisowen: Effort vuevuq vijaja navaja nd6apu doneja pe6apu eoneja qd6apu doneja na6apu aonava relive junks it a civvylung 19Nc6 vestja vitoff vowapu vimapu bither honeja ravija concho vijaja 2 3 it ok vowuma vimuma rhd1ja doneja nd1apu doneja junks it a 21.Rxd1 vestja vijaja honda doneja vijaja 6 7 it ok vowuma vimuma vijaju effort flusho its einsop yammur vestja ruleov dascha wobble vijaja cutfig its einsop yummud radlud howits buckon vijaja rugguv fidget its einsop yammur vestja nd6apu doneja vijaja umsums fineja aylevy aquaja eithduv effort nd6apu doneja;
Aug-01-20
Premium Chessgames Member
  chrisowen: Gi joe nd6 huffled it in no?
Aug-01-20
Premium Chessgames Member
  lproyect: Great story about how he got his name.

https://en.wikipedia.org/wiki/Tigra...

Aug-01-20  catlover: Nicely played by the "other" Tigran Petrosian. Thanks, <lproyect>, for the back story about how Tigran Levonovitch got his name.
Aug-01-20
Premium Chessgames Member
  Predrag3141: <Cheapo by the Dozen: Black was well and truly busted once he declined to play ... Qxg2+>

19 ... Qxg2+ 20 Ka3 Na6 21 Rhe1 Qf3 22 Ng5, and the tempo Black has lost moving his queen twice costs him the knight on e3.

A move later, after 20 Rhd1, ... Qxg2+ allows mate in about the same number of moves as what was played, 20 ... Nxd1+ and 21 ... Qc6.

Aug-01-20  TheaN: I refused to calculate this one through, as <18.Nxd6+ exd6 19.Qxd6> is incredibly obvious (again as per yesterday, what else, though Nbc7 is a reasonable alternative this time). Yes Black has some half decent defenses, but White opens up the center completely with an undeveloped opponent for a N:2P.
Aug-01-20  ajile: <lproyect: Great story about how he got his name. https://en.wikipedia.org/wiki/Tigra...

"The ex-world champ died a month before Tigran L. Petrosian was born." https://en.wikipedia.org/wiki/Tigra...

So maybe the "new" Petrosian is the reincarnation of the old one.

:o)

Aug-01-20
Premium Chessgames Member
  Breunor: Some notes from Stockfish:

Al Wazir:
<After 21...Qe2+ 22. Ka3 Qxd1 23. Qxd1, material is even and black isn't obviously lost.>

After 21 ... Qe2

1) +5.95 (22 ply) 22.Kc1 Qxd1+ 23.Kxd1 h6 24.Kc1 Rg8 25.f5 gxf5 26.Nf4 Rf8 27.Ng6 Kf7 28.Ne5+ Kg7 29.Qg6+ Kh8 30.Qxh6+ Kg8 31.Qg6+ Kh8 32.Nf7+ Rxf7 33.Qxf7 Rb8 34.Qxf5 Kg7 35.g4 Rf8 36.Qg5+ Kh8 37.h4 Rf1+ 38.Kb2

For 20, Rd1 is two points better than Re1 but both should win:

1) +5.79 (23 ply) 20.Rhd1 Nxd1+ 21.Rxd1 Qe2+ 22.Kc1 Qxd1+ 23.Kxd1 h6 24.g4 Rg8 25.f5 gxf5 26.gxf5 Kf7 27.Qd7+ Kf6 28.Qxb7 Rad8+ 29.Nxd8 Rxd8+ 30.Kc2 Rd6 31.Qh7 Kg5 32.Qe7+ Rf6 33.Kd3 Kxf5 34.Qxa7 Ke5 35.Kc4 Re6 36.Qb7 Kf5 37.Qh7+ Kg5 38.Qd7 Kf6

2) +3.88 (22 ply) 20.Rhe1 Rc8 21.Ng5 Qe7 22.Qxe7+ Kxe7 23.Rcd1 Rcd8 24.Rxe3+ Kf6 25.Rde1 Rd2+ 26.Ka1 Rxg2 27.Re7 Kf5 28.Rxb7 c4 29.Rxa7 cxb3 30.Rxa6 Rc8 31.axb3 Rxc3 32.Ne6 Kg4 33.Ra2 Rxa2+ 34.Kxa2 Rc2+ 35.Ka3 Rxh2 36.b4 h6 37.Kb3

Cheapo, I'm not sure for which move you think black shoudl play Qg2 ch, but I'm seeing it as a best move on any move near the puzzle in the computer analysis.

Walter and Chrisowen (I think) advocate 19 .. Nc6. Stockfish agrees, but black's position is still very difficult:

1) +2.44 (22 ply) 19...Nc6 20.Rhd1 Nd4 21.cxd4 Nxd1+ 22.Rxd1 Qe2+ 23.Kc1 c4 24.Nc7+ Kf7 25.Qd5+ Kg7 26.Nxa8 Re8 27.Qxc4 Qxa2 28.d5 Rxa8 29.d6 Qa1+ 30.Kc2 Qf6 31.g4 Rd8 32.g5 Qf7 33.Qd4+ Kg8 34.Re1 Qg7 35.Qd5+ Qf7 36.Qxf7+ Kxf7 37.Re7+ Kf8 38.Rxb7 Rxd6 39.Rxh7 Ra6

2) +3.27 (21 ply) 19...Nd7 20.Rhe1 Nb6 21.Qxc5 Rc8 22.Qxe3 Qxe3 23.Rxe3 Kf7 24.Ng5+ Kf8 25.Rce1 h6 26.Ne4 Rc6 27.c4 Rh7 28.Nc5 Rc8 29.Nd3 Kg8 30.Re7 Rd8 31.Kc3 Rf7 32.Re8+ Rxe8 33.Rxe8+ Kg7

Aug-01-20  saturn2: Me too looked ar 20 Re1

5...c5 and 6..Bd7 seem questionable considering how the game proceeded. 5...0-0 or c6 and 6...Nfd7 would be my choice but I am no Pirc expert.

Aug-01-20  RandomVisitor: After 16.Kb2 better was 16...Qxg2 followed by 17...Nf2:


click for larger view

Lc0_0.26.1_384x30-t60-4585.pb:

<37/82 2:09:31> 6,381k 820 <-0.24 16...Qxg2+ 17.Ka3 Nf2> 18.Nxd6+ Kd7 19.Qe2 Bxc1+ 20.Raxc1 exd6 21.f5 Nc6 22.Rhd1 b6 23.Nf4 Qe4 24.Qxf2 Rhf8 25.Qd2 Qe5 26.Rf1 Rxf5 27.Rce1 Qh8 28.Qd3 Re8 29.Rd1 Qe5 30.Nd5 Nd4 31.Rxf5 gxf5 32.Qc4 Nc2+ 33.Ka4 Qe2 34.Nf6+ Kc8 35.Rxd6 Qxc4+

Aug-01-20  Diana Fernanda: https://images.app.goo.gl/5H5jfYSyR...

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