Tigran L Petrosian vs Georg Halvax (2018)

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Tigran L 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]

FEN COPIED

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+ sac: 18.Nxd6+	PGN: download \| view \| print	Help: general \| java-troubleshooting

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Aug-01-20		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		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		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		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		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		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		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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