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Wednesday, August 25, 2021

An Opening Experiment Goes Wrong

     The 9th Chess Olympiad, the first post-war international team tournament, took place between August 20 and September 11, 1950, in Dubrovnik, Yugoslavia. Eighty-four players from 16 nations took part. 
     One of the favored teams from the very start, the Yugoslav team won the championship a full two points ahead of Argentina. The United States fourth place finish was a disappointment, but it had the consolation of going undefeated in all fifteen team matches. Had the team championship depended on match results, the US would have won. 
     Yugoslavia's success was the result of its overwhelming scores in six matches: Norway, Greece, Peru, Italy and Denmark were defeated 4.0 and France by a score of 3.5. 
     Argentina was also highly favored and Najdorf and Bolbochan scored an impressive 80 percent, but the other boards fared less well.
     US team scores were: Samuel Reshevsky (+6 -0 =5), Herman Steiner (+3 -3 =1), I.A. Horowitz (+2 -1 =5), George Shainswit (+4 -2 =6), George Kramer (+4 -2 =5) and Larry Evans (+8 -0 =2)
     In the following game Esteban Canal (1896–1981), a leading Peruvian player who had his best tournament results in the 1920s and 1930s, tried what was at the time a cutting edge opening innovation. 
     The experiment actually looks quite good because white got an active position, but it never received much attention, perhaps because white lost this game. After Canal slipped up on move 13 Najdorf got the advantage, but there followed a few inaccurate moves by both sides. At move 24 the chances were equal, but Canal miscalculated and Najdorf got back in the driver's seat and finished him off.

Esteban Canal - Miguel Najdorf

Result: 0-1

Site: Dubrovnik Olympiad

Date: 1950.08.20

King's Indian Defense

[...] 1.d4
1.♘f3 This, the shortest game of the event, is a bonus game. Castaldi (Italy) vs. Reshevsky (USA) 1...d5 2.g3 ♘f6 3.♗g2 g6 4.O-O ♗g7 5.c4 d4 6.e3 c5 7.exd4 cxd4 8.d3 ♘c6 What could possibly go wrong in this position? 9.♕a4 Risky 9...O-O 10.b4 ♘d7 11.♘bd2 a5 12.♗a3 Losing 12...axb4 13.♕xa8 Not only was the game lost, white adds to his embarrassment by losing his Q. 13...♘b6
1...♘f6 2.c4 g6 3.♘c3 ♗g7 4.e4 d6 5.♗e2 This move is fairly common nowadays, but at the time it was new and interesting. In this game Canal has an interesting idea in mind: he intends to advance his h-Pawn against black's anticipated castling there. 5...O-O 6.h4 These days white almost always plays 6.Nf3 or less frequently Averbakh's 6.Bg5. Canal's move is a the second move in the plan. It is a prelude to h5 as well as Nh3 where the t will not interfere with the mobility of his light squared B. 6...c5 7.d5 e6 (7...b5 is also playable. 8.cxb5 a6 as in the Benko Gambit.) 8.dxe6 ♗xe6 Not 8...fxe6 because it weakens the K's position. Black has a backward d-Pawn, but as compensation he has play in the center. 9.♗f4 ♕a5 10.♕d2 In the K-Indian the capture of the P on d6 is somehow always poisoned and so white correctly avoids taking it!
10.♗xd6 loses to 10...♘xe4 11.♗xf8 ♗xc3+ 12.bxc3 ♕xc3+ 13.♔f1 ♘d2+ 14.♔e1 ♘xc4+ 15.♔f1 ♘d2+ 16.♔e1 ♘b3+ 17.♔f1 ♘xa1
10.♕xd6 also loses to 10...♘xe4 11.♕d3 ♗f5 12.♗d2 ♘xf2 and white suffers a heavy material loss.
10...♖d8 Best.
10...♘c6 11.♘f3 ♘d4 12.♗d3
12.O-O-O b5 13.♘xd4 cxd4 14.♘xb5 ♕xa2 15.♘xd6 and black won. Soos,A (2315)-Puschmann,L (2370)/Hungary Tch 1992
12...♘b3 13.axb3 ♕xa1+ 14.♕d1 ♕xd1+ 15.♔xd1 ♖fd8 Black is much better. Birkholz,O (2076) -Majdan-Gajewska,J (2369)/Erfurt 2017
11.♘h3 This is the third move move in white's plan...from here the N does not interfere with the B and white has a very active position. (11.h5 was also playable. 11...♘c6 12.hxg6 fxg6 13.♗h6) 11...♘c6 12.♘g5 ♘d4 Threatening ...Nb3 13.O-O-O White avoids the threat, but walks into the long range of black's fianchettoed B which serves to strengthen black's Q-side counterplay. But, he could not very well play 13. O-O either because then his h-Pawn is left with no purpose. (13.♘xe6 fxe6 14.♖d1 a6 15.♗d3 is reasonable.) 13...b5 Black opens up lines of approach to white's K. In the meantime white's attack is stalled as he must attempt to check black's counterattack. 14.♘xe6 (14.cxb5 ♗xa2 and, among other things, black threatens ...Nb3) 14...♘xe6 Withdrawing the N allows white to equalize.
14...fxe6 keeps the advantage after 15.♔b1 bxc4 16.♗xc4 ♖ab8 and white is in danger on the Q-side.
15.cxb5 This leaves black with a choice of plausible moves: 15...Nxe4, 15...d5 and the move he actually plays.
15.♗g5 was even better as after 15...b4 16.♗xf6 bxc3 17.♕xc3 ♕xa2 18.♗xg7 ♘xg7 19.h5 chances are equal.
15...a6 Forcing open the b-file. It works out OK, but it shouldn't have!
15...♘xe4 16.♘xe4 ♕xa2 17.♘c3 ♗xc3 18.♕xc3 ♘xf4 19.♗c4 ♕a4 20.h5 Now black should avoid capturing the h-Pawn and play 20...d5 Shootouts yielded 5 draws.
15...d5 16.e5 ♘d7 17.♔b1 ♘xf4 18.♕xf4 ♗xe5 19.♕f3 ♗xc3 20.♕xc3 ♕xc3 21.bxc3 Some tricky endings resulted from this position in which white scored +0 -1 =4
16.bxa6 This plays right into black's hands.
16.♗h6 was essential. Then after 16...axb5 17.♗xg7 ♔xg7 18.h5 A Shootout from this position resulted in white scoring +1 -1 =3. Interesting!
16...♖ab8 Now black's R and B bear down on the b-Pawn. The combination of the two, in conjunction with the Q, is sufficient to work up a dangerous onslaught against white's K. 17.♗c4 Hoping to use the B to defend his K.
17.♗xd6 is, as is usually the case, a disaster. 17...♘xe4 18.a7 ♗xc3 19.♕xc3 ♘xc3 20.axb8=♕ ♘xe2+ 21.♔b1 ♖xb8 black wins
17...♘xf4 This deflects the Q so he can play his next move.
17...♘xe4 was a crusher. 18.♘xe4 ♗xb2+ 19.♔c2 ♘d4+ 20.♔d3 ♕a3+ 21.♘c3 ♖b4 22.♗d5 ♖e8 is curtains.
18.♕xf4 ♖xb2 The point! The sacrifice exposes the white's K, but while pretty, it was not the most coldblooded way to finish him off, so says Stockfish.
18...d5 19.exd5 ♘g4 20.♕g3 ♖b4 21.♕xg4 ♖xb2 22.♖h3 ♕b4 23.♕e4 ♗xc3 24.♕d3 ♖b3 25.♔c2 ♕a3 26.♕xc3 ♕xa2+ 27.♔d3 ♖xc3+ 28.♔xc3 with a decisive advantage says the engine.
19.♔xb2 ♘xe4 A technical inaccuracy that allows white to squirm out of his predicament. After 19...Nd5 black obtains a dangerous attack.
19...♘d5 20.♕f3 ♘xc3 21.♔c2 d5 22.exd5 ♕b4 23.♕d3 (23.♗b3 c4) 23...♖b8 24.♗b3 ♘b5 25.a7 ♘a3+ 26.♔c1 ♗h6+ 27.♖d2 ♖a8 with the advantage.
20.♕xf7+ This would not be available after 19...Nd5 20...♔h8 21.♖d3 White is still facing difficulties, but at least he has some hope of surviving. 21...♘xc3 22.♔c2 ♘e2 This move quite possibly could have lost the game!
22...♖f8 This was the correct move. Then after 23.♕e6 d5 24.♖f3 ♖d8 25.♖d3 ♘xa2 26.♖b1 ♘b4+ 27.♖xb4 cxb4 28.♗xd5 white is right back in the fight.
23.♖e3 This results in no more than equality. He missed a good opportunity with 23.h5!
23.h5 ♖f8 24.♕b7 gxh5 25.♖xh5 ♕a4+ 26.♕b3
26.♗b3 ♕f4 27.♖d2 ♘d4+ 28.♔d3 ♘xb3 29.♕xb3 ♕g4 30.♖d5 ♕g6+ 31.♔e2 ♕xg2 32.a7 ♖xf2+ 33.♔d1 ♖f1+ 34.♔c2 ♕e4+ 35.♕d3 ♕a4+ 36.♕b3 ♕e4+ draws
26...♕e8 27.♖xh7+ ♔xh7 28.♖h3+ ♔g6 29.♕d3+ ♔g5 30.♕xe2 and white has a won position.
23...♖f8 24.♕xf8+ Two question marks for this! White has overrated his attack. 24 Qb7 leads to a draw while after 24.Qd5 things get complicated. . Now Najdorf has a new lease on life. (24.♕b7 ♕a4+ 25.♗b3 ♕d4 26.♖xe2 ♕b2+ 27.♔d1 ♕a1+ 28.♔c2 ♕c3+ draws.)
24.♕d5 ♘d4+ 25.♔d1 ♗h6 26.h5 (26.♖d3 ♕a4+ 27.♗b3 ♕xa6 is unclear.) 26...♗xe3 27.fxe3 ♕a4+ 28.♗b3 ♘xb3 29.♕xb3 ♕xa6 with a likely draw.
24...♗xf8 25.♖xe2 If 25.Bxe2 Qxa2+ and white's K is forced into an embarrassing position. 25...♕a4+ 26.♗b3 ♕xa6 Black's two center Ps are going to prove to be too much to handle. 27.♖e8 The threat of ...c4 together with the mating threats will prove to be more than white can deal with. 27...♔g7 28.♖e4 Stopping 28...c4 28...♕b7 29.♖he1 d5 The Ps are off and running. 30.♖f4 ♗d6 31.♖g4 c4 32.♗xc4 (32.♗a4 ♕b4 forks the R and B.) 32...dxc4 White plays the rest of the game out of sheer momentum.. 33.♖d1 there is nothing else anyway
33.h5 ♕d5 34.♖e3 ♗b4 35.h6+ ♔xh6 36.♖h4+ ♔g7 37.a3 ♕d2+ 38.♔b1 c3 39.♖e2 c2+ 40.♔a2 ♕xe2 41.♖e4 ♕xe4 42.♔b3 c1=♕ 43.♔a4 ♕cc2+ 44.♔b5 ♕b7#
33...♗e5 34.♖xc4 ♕b2+ 35.♔d3 ♕xa2 36.♖dc1 ♕xf2 37.♖e4 White resigned
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