Andriy Vovk vs Aleksandr Lenderman (2014)

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Andriy Vovk vs Aleksandr Lenderman
Qatar Masters (2014), Doha QAT, rd 9, Dec-04
French Defense: Tarrasch Variation. Open System Euwe-Keres Line (C07) · 1-0

ANALYSIS [x]

FEN COPIED

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Jan-13-16		diagonalley: figured the likely first move... but the continuation/s were a bit murky... (harder than usual for a wednesday)

Jan-13-16		Nick46: My excuse is that I still haven't got back my real chessboard and wooden pieces.

Jan-13-16		cocker: I found this one very hard, in fact impossible.

Jan-13-16		Eduardo Leon: I got stuck trying to make 19.♘xe5 gxh3 20.♘g6+? work for about half a minute, then realized there's another way to cover f8: 20.♘xd7+!. At this point, it's pretty much game over. Not capturing the queen simply allows 20.♕h4, with the deadly threat 21.♘xg4+, and again it's pretty much game over.

Jan-13-16		morfishine: <19.Nxe5>

Jan-13-16		Ratt Boy: Does anybody think that 14...♔e7 is a good move?

Jan-13-16		wooden nickel: 19.Nxe5 was easy to guess since the queen and bishop aren't really hanging (at least not without compensation), the more challenging part was after 19... BxNe5 click for larger view then 20.Qh4 (weaker Qg3). <Nick46: My excuse is that I still haven't got back my real chessboard and wooden pieces.> I used my real chessboard with wooden pieces!

Jan-13-16		patzer2: Today's Wednesday (19. ?) puzzle is tougher than our usual midweek selection. Three White pieces are en prise, so it would seem a desperado-like move sacrificing the Queen is necessary. The most active desperado I could find was 19. Nxe5! I looked at 19. Bxe5? as an alternative, but after 19. Bxe5 gxh3 20. Bxd7 Kxd7 21. Rad1 Rhg8 22. Bxd6 Rxg2+ 23. Kf1 Qxd6 24. Ne5+ Kc7 25. Rxd6 Kxd6 26. Nxf7+ Kd7 (-8.07 2 21 depth, Deep Fritz 15) Black turns the tables and steals the win from White I visualized 19. Nxe5 (19. Bxe5? gxh3 20. Bxd7 Kxd7 ) 19... Bxf5 (19... gxh3 20. Nxd7+ Kd8 (20... Be5 21. Bxe5 ) 21. Bxf6+ Kc8 (diagram below) click for larger view and settled on 22. Bxh8 (-5.85 @ 18 depth, Deep Fritz 15). However, what I missed in calculating that line is 22. Nxc5+! (diagram below) click for larger view 22...Qd7 23. Bxd7+ (-15.60 @ 24 depth, Stockfish 5SE) is a much stronger continuation than 22. Bxh8 .

Jan-13-16		patzer2: For a possible improvement for Black, I prefer 9...Ne7 = as in C Balogh vs Ngoc Truongson Nguyen, 2014. The computers agree with <Gilmoy> that <14...Ke7?> to (-1.68 @ 23 depth, Komodo 9.01) was much too <brave>. Instead, my computer indicates 14...c5 15. Bb2 Bc6 (+0.52 @ 22 depth, Deep Fritz 15) keeps Black in the fight.

Jan-13-16		scholes: This was atleast saturday level.

Jan-13-16		patfoley: After 19 ... Bxe5, white can win an exchange and a pawn with 20 Bxe5. Given that the straightforward Nxe5 wins without subtlety in most lines, the one trick of the puzzle is to see how well the minor pieces coordinate after B takes the Q.

Jan-13-16		saturn2: I got lost in too many variations. After 19 Nxe5 one has to calculate also 19...Kf8 for instance. As far as I see white wins only two pawns which is nice but not enough for a puzzle solution. For instance 20 Nxd7+ Nxd7 21 Qxg4 Rg8

Jan-13-16		patzer2: <Saturn 2> After 19. Nxe5 Kf8 20. Nxd7+ Nxd7, the computer gives a White win with 21. Qh4! (+9.03 @ 21 depth, Deep Fritz 15). After 19. Nxe5 Kf8, White can also win with the immediate 20. Qh4! (+9.15 @ 20 depth, Deep Fritz 15).

Jan-13-16		Jimfromprovidence: Another interesting line to work through is after the text 19 Nxe5 Bxf5 20 Qh4. Black, anticipating 21 Nxf7+, tries 20... Rhf8. click for larger view White still wins with 21 Nxf7+! (as well as with other moves). click for larger view

Jan-13-16		kevin86: A surprise must be in store since white is en prise. The knight move sets up a double check. Black then falls on the following move.

Jan-13-16		CHESSTTCAMPS: In this dynamic middlegame attacking position, material is even, but the black king is highly exposed in the middle, while white is in a nasty triple fork. Black threatens gxh3, gxf3, and Bxf5. White has only one reasonable course of action - create a deadly discovered check on the e-file. 19.Nxe5! Not 19.Bxe5?? gxh3 20.Bxd6+ Kxd6 and the black king is escaping. A. 19... gxh3 20.Nxd7+! Kd8? 21.Bxf6+ Kc8 22.Nc5+ wins the queen (B+N) A.1 20... Be5 21.Bxe5 Qxd7 (Qb7 22.Bxf6+ Kd6 23.Be5+ Ke7 24.Bxb8+ wins) 22.Bxf6+ Kxf6 23.Bxd7 leaves white a piece up B. 19... Bxe5 20.Bxe5 gxh3 21.Bxc7+ Be6 22.Bxb8 wins at least an exchange plus pawn. C. 19... Bxf5 20.Nxg4+ Kf8 (other 21.Bxf6+ wins) 21.Bxf6 with two extra pawns and ongoing attack. Time for review....

Jan-13-16		dfcx: tough one today. black is about to take the white queen, but white already has three pieces aiming at the pinned knight. Moving the queen is a bit too passive, so let's try some attack first. There are 3 options for white, Nxe5, Bxe5 and Rxe5. 19.Rxe5+ Bxe5 20.Bxe5 gxh3 21.Bxc7 Bxf5 22.Bxb8 Rxb8 and black is up a piece. click for larger view 19.Bxe5 gxh3 20.Bxd6+ Kxd6 21.Ra1d1+ Nd5 and white runs out of steam. click for larger view This leaves only one option for white: 19.Nxe5 A. 19...Bxe5 20.Qh4 Bxf5 21.Bxe5 Qb6 22.Bxf5+ Kd7 23.Bxh8 Rxh8 24.Qe7+ Kc6/Kc8 25.Qe5 wins the bishop back click for larger view B. 19...gxh3 20.Nxd7+ Kd8 (Be5 21.Bxe5) 21.Bxf6+ Kc8 22.Nxc5+ Qd7 23.Nxd7+ wins click for larger view

Jan-13-16		CHESSTTCAMPS: I also considered the move 20.Qh4 in line C (which turned out to be the game ender) but thought Ng4+ more clearly got the piece back with a big advantage.

Jan-13-16		thegoodanarchist: Too hard for Wednesday!

Jan-13-16		transpose: I quickly realized white should sac his queen by going for mate, and then i figured out 19 Nxe5 gxh3 20 NxBd7+ Kd8 21 Nxf6+ Kc8 22Nc5. But after 19. . Bxf5 I opted for Qc3 instead of Qh4, which is better.

Jan-13-16		agb2002: The material is identical. Black threatens 19... gxh3, 19... gxf3 and 19... Bxf5. The rook on e1 x-rays the black king. This suggests 19.Qg3, to attack the pawn on e5: A) 19... Bxf5 20.Bxe5 A.1) 20... gxf3 21.Bxd6+ followed by 22.Bxc7 wins. A.2) 20... Bxe5 21.Rxe5+ A.2.a) 21... Kd8 22.Rxf5 A.2.a.i) 22... Qxg3 23.hxg3 wins a pawn with a better ending. For example, 23... gxf3 24.Rxf6 Ke7 25.Rxf3 wins a second pawn. A.2.a.ii) 22... gxf3 23.Rxf6 wins a pawn. A.2.a.iii) 22... Qb6 23.Rxf6 wins decisive material (23... Qxf6 24.Qxb8+ Kd(e)7 25.Rd(e)1+ with an extra piece). A.2.b) 21... Be6 22.Rxe6+ Kd8 (22... Kd7 23.Re7+ wins; 22... K(f)xe6 23.Qxc7 wins decisive material) 23.Qxc7+ Kxc7 24.Rxf6 gxf3 25.Rxf7+ followed by 26.Rxf3 wins three pawns. A.2.c) 21... Kf8 22.Rxf5 (22.Re8+ Nxe8 protects the queen) is similar to previous lines. A.3) 20... Nh5 21.Bxd6+ followed by 22.Qh4+ wins decisive material. B) 19... gxf3 20.Bxe5 looks similar to previous lines. C) 19... Nh5 20.Qxg4 wins a pawn with an overwhelming position.

Jan-13-16		agb2002: According to Stockfish, after 19.Qg3 gxf3 20.Bxe5 Bxe5 21.Rxe5+ Kf8 22.Bxd7 Qxd7 23.Qxf3 Black has a slight advantage. I'll remember this one.

Jan-13-16		JohnDMaster: Once again, this puzzle cannot be 2 stars because there are so many branches that you have to analyse, I looked at and found Nxe5 but you still had to find the right discovery after you lose your queen,I would give this puzzle 3 stars, I missed Qh4, a wonderful quiet move that ends the game.

Jan-13-16		Sniffles: <Gilmoy> The wreckage is legendary. Nicely lucid post. I'd agree it should have been 3 stars as there are so many permutations but at the same time the pawn threat to the queen was a dead giveaway. Queen sacrifice just isn't in peoples thinking as a rule but the subsequent rout, only requiring a modicum of finesse, turned Blacks game into a disaster area with bodies everywhere.

Jan-13-16		RandomVisitor: 19.Qh4 gxf3 20.Bxd7 also seems to work click for larger view Komodo-9.3-64bit: +2.33/33 20...Rbg8 21.g3 Rg5 22.Bh3 Qc6 23.Rad1 Bc7 24.Qf4 Re8 25.Bxe5 Rxe5 26.Rxe5+ Bxe5 27.Qxe5+ Kf8 28.Qf4 Nh5 29.Qd2 Re2 30.Qc3 Nf6 31.Rd8+ Kg7 32.Bf1 Re7 33.a3 Kg6 34.Bc4 Qc7 35.Rd1 Qc6 36.h4 Kh7 37.Rd8 Qc7 38.Bd3+ Kg7 39.Rd5 Qc6 40.Rxc5 Qe6 41.Bf1 Qe1 42.Qxf3 Qa1 43.Qc3 Qxc3 +2.34/33 20...Rhg8 21.g3 Rg5 22.Bh3 c4 23.Qf4 c3 24.Bc1 Qc6 25.Ba3 Rb5 26.Bxd6+ Qxd6 27.Qxf3 Rd5 28.Qxc3 Rd2 29.Bg2 Ng4 30.Rf1 Qd4 31.Qc7+ Kf8 32.c3 Qb6 33.Qxb6 axb6 34.h3 Nf6 35.Rfd1 Rc2 36.Rd6 Rf5 37.Rf1 b5 38.Rb6 e4 39.g4 Rf4 40.Rxb5 Rxa2 41.c4 Nd7 42.Rd5 Nf6 43.Rd8+ Ke7 44.Rb8

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