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Efim Bogoljubov vs Alexander Alekhine
Alekhine - Bogoljubov World Championship Match (1929), Heidelberg GER, rd 10, Oct-05
Queen's Gambit Declined: Cambridge Springs Variation (D52)  ·  0-1
ANALYSIS [x]

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Kibitzer's Corner
Aug-02-06
Premium Chessgames Member
  Honza Cervenka: Combined menace of advance of passed c-Pawn and attack of R+Q against white King gave black the decisive advantage here. The finish could have been 50.Kh4 Rh5+! 51.Kxh5 Qh3+ 52.Rh4 Qf5# or 52...g6# if you like it more.:-)
Mar-05-08  Knight13: Black looked a bit passive in the opening. Now I'm just wondering if 23. b5 is really better than 23. bxc5.
Sep-25-09  WiseWizard: So instructive and lucid all the plans are logical and the moves that carry out the plans as well. Plan #1 Remove the white knight on e4 which is holding black from freeing his game with c5. The technique used to carry this out is also the correct one (tempo). Plan #2 After c5 was played and it becomes a passed pawn its time to remove all the blockaders. Plan #3 Infiltrate the enemy position (with tempo) so your pieces can assist the pawn in its march. After this its only a matter of time before the position let alone the opponents mind cracks under the pressure. Determined and uncomprosing play by the Champion.
Sep-26-09
Premium Chessgames Member
  Pawn and Two: This game was closely contested for many moves. At move 25, Fritz indicated the game was about equal: (-.09) (20 ply) 25.a4.

Instead of 25.a4, and an equal position, Bogoljubov played 25.Nxe5. Even this continuation gave Alekhine only a minimal edge: (-.26) (20 ply) 25.Nxe5 Qxe5 26.Bc4 Bxc4 27.Qxc4 Qb2 28.a4 Rxd1+ 29.Rxd1 Qb4 30.Rc1.

On his 30th move, Bogoljubov made a slight error: (-.62) (20 ply) 30.Qc2. Then another slight error followed at move 31, when instead of: (-.62) (20 ply) 31.Rb1, he played: (-.74) (20 ply) 31.Ne2.

On his 33rd and 34th moves, Bogoljubov clearly stepped over the edge, with a resulting lost position.

First at move 33, instead of: (-.78) (22 ply) 33.Rd7, Bogojubov played: (-1.10) (22 ply) 33.Rb1 Qa5, and then instead of: (-1.00) (21 ply) 34.Rd1, he played: (-1.54) (21 ply) 34.Kg2?.

Due to a succession of errors by his opponent, Alekhine had a won position at his 34th move.

The position after 34.Kg2?:


click for larger view

In this positon, Alekhine could have won by: (-1.53) (21 ply) 34...Rc4! 35.Ra1 Rb4! 36.Nd4 Bxd4 37.exd4 Rxd4 38.Rc1 Rxa4 39.Qxc3 Qxb5.

Instead of continuing with the winning 34...Rc4!, Alekhine made a series of errors, which turned his winning position, into a lost position!

First at move 34, Alekhine played: (-.64) (21 ply) 34...Rd8?, which gave up much of his advantage.

Then on his next move, instead of: (-.72) (20 ply) 35...Qc7, Alekhine made a slight error with: (-.39) (20 ply) 35...Rd2 36.Qa8+.

After 36.Qc4, Alekhine could have continued: (-.54) (21 ply) 36...Qd8. Instead, he slipped again with: (.16) (21 ply) 36...Rc2? 37.Rd1.

Finally, at move 37, instead of: (.19) (21 ply) 37...Rd2, with an approximately equal position, Alekhine played 37...Qb6??, and he then had a losing position!

Alekhine, with his series of errors, had returned the favor to Bogoljubov!

The position after 37...Qb6??:


click for larger view

In this position, Bogoljubov had a winning continuation with: (1.44) (25 ply) 38.Rd7! Rb2, (1.61) (23 ply) 39.Qc8+ Kh7 40.Nd4 Bxd4 41.exd4 c2 42.Qc3 Ra2 43.Rxf7, (1.39) (24 ply) 43...e5 44.dxe5 Qe6 45.Rc7 Qd5+ 46.Qf3 Qxf3+ 47.Kxf3 Kg6, (2.01) ( 24 ply) 48.Ke3 Kf5 49.Kd2 Rxa4 50.Rxg7 Kxe5 51.Rh7 Rc4 52.Kc1 Ke4 53.Rxh6 Rc7, (3.02) (23 ply) 54.b6 axb6 55.Rxb6, or (3.07) (23 ply) 54.Ra6 Kd4 55.b6 axb6 56.Rxb6, with a winning position for White.

Sep-28-09
Premium Chessgames Member
  Pawn and Two: Yates and Winter in their book on this match made no comment regarding 38.Rd7!. They did note the following variation: <38.Qd3 Rb2 39.Nxc3? Rb3, and wins>. Actually, the variation 38.Qd3 Rb2 39.Qc4, is about equal after 39...Qb7. Yates and Winter should have put more time into their analysis, and then perhaps they would have found the move 38.Rd7!.

Missing his winning chance, 38.Rd7!, Bogoljubov played: 38.Nd4. This move gave White some advantage, but a draw was the likely outcome: (.44) (26 ply) 38...Bxd4 39.Rxd4 e5 40.Qxc8+ Kh7 41.Qf5+ Qg6 42.Qxe5 Ra2 43.Rc4 c2.

Instead of 38...Bxd4, Alekhine played 38...Qd8, which is also in favor of White, but again a draw seems probable: (.70) (26 ply) 38...Qd8 39.Qd3 Ra2 40.Qxc3 Qd5+ 41.Kg1 Rxa4 42.Qc8+ Qd8 43.Qxd8+ Bxd8 44.Nxe6 fxe6 45.Rxd8+, or (.69) (25 ply) 39...Rb2 40.Qxc3 Qd5+ 41.Kg1 Qa2 42.Rf1.

After 39.Rd3? Bxd4, the position was approximately equal. Regardless of how White recaptures the bishop, he could gain no advantage: (.08) (21 ply) 40.exd4 Qd5+; (.00) (21 ply) 40.Rxd4 Qf6; or (-.03) (21 ply) 40.Qxd4 Qxd4.

Yates and Winter stated: <40.Qxd4 seems to draw. Also, 40.exd4 is stronger than the text...>. They seem to indicate that 40.Rxd4 is the losing move, but computer analysis shows the position after 40.Rxd4 to be equal.

After 42.e4, Yates and Winter stated that White's position could no longer be held. They also stated that after: 42.Re4 Qf5 43.Rf4 Qd5+ 44.Qxe5 exd5; the pawn could not be stopped.

The analysis by Yates and Winter is incorrect. The position is nearly equal after: 42.e4 (.03) (21 ply) 42...g5, or 42.e4 (-.07) (21 ply) 42...Rd2.

Also, their conclusion regarding 42.Re4 is incorrect. After 42.Re4 Qf5 43.Qc8+ Kh7 44.Rf4 Qd5+ e4, the position is equal.

At move 43, Bogoljubov should have played: (-.08) (22 ply) 43.a5 c2 44.b6 axb6 45.axb6 Qb2 46.Qc8+ Kh7 47.b7, with an equal position. Yates and Winter made no comment regarding this possibility.

Even after 43.Qc8+? Kh7, White would have had good drawing chances with: (-.53) (25 ply) 44.Rf3 c2 45.Qc3 Qd4 46.Qxd4 Rxd4 47.Rc3 Rxe4 48.Rxc2 Rxa4.

After 44.Rxf7?? Qxe4+, White was unable to defend against a mating attack, and the deadly passed pawn.

The time control was at move 40, and a time shortage may have contributed to some of the errors in this game. Perhaps a draw would have been a more equitable result, but this time the fortunate one was Alekhine!

May-28-12  LoveThatJoker: Guess-the-Move Final Score:

Bogoljubov vs Alekhine, 1929.
YOU ARE PLAYING THE ROLE OF ALEKHINE.
Your score: 97 (par = 77)

LTJ

Sep-19-13  Karpova: The game is given with two additional moves at the end: 50.Kh4 Rh5+!

Hans Kmoch remarks that Bogoljubov spent 1 hour and 20 min on moves 42 and 43, although these were the moves directly after resumption of the game.

Source: Page 293 of the October 1929 'Neue Wiener Schachzeitung'

Sep-19-13  thomastonk: <Karpova> I've checked some Dutch newspapers.

"Algemeen Handelsblad" of October 7 states that White resigned after 50.Kh3-L4 (should be 50.Kh3-h4, of course).

"De Tijd" of the same day states that White resigned "immediately" after 50.Kh3-h4.

"Het Vaderland" of October 8 states that White resigned after 50.Kh3-h4.

I could not find the game in "The Times".

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