Efim Bogoljubov vs Ludwig Rellstab (1935)

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Efim Bogoljubov vs Ludwig Rellstab
Berlin Masters (1935), Berlin GER, rd 4, Feb-04
Queen's Gambit Declined: Alekhine Variation (D51) · 1-0

ANALYSIS [x]

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sac: 19.Bxh7+	PGN: download \| view \| print	Help: general \| java-troubleshooting

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Sep-15-11		kingscrusher: Wow, Bogo used Alekhines system from his WC match with crushing effect here.

Mar-10-22		Brenin: The smothered mate arising after 18 Bxf5 exf5 19 Qc4+ Kh1 20 Nf7+ etc is very tempting. Black can decline the B sac, protect f7, and remove the threatening N with 18 ... Bxg5, but then 20 Bxh7+ Nxh7 21 gxh5 Nf8 22 Ne5 looks very strong for White.

Mar-10-22		mel gibson: I saw that within 10 seconds. I'm doing well this week. Stockfish 14.1 says: 18. Bxf5 (18. Bxf5 (♗d3xf5 e6xf5 ♕c2-c4+ ♘f8-e6 ♘g5xe6 ♗c8xe6 ♕c4xe6+ ♔g8-h8 ♕e6xf5 ♖e8-f8 ♕f5-c2 ♕c7-f4 ♖h1-e1 ♗e7-f6 c5xb6 a7xb6 ♕c2xc6 ♗f6xh4 ♘f3xh4 ♕f4xh4 d4-d5 ♕h4xf2 d5-d6 ♕f2-f7 a2-a4 ♕f7-f5+ ♕c6-c2 ♖a8-d8 d6-d7 ♔h8-g8 ♖e1-e7 h7-h5 ♖d1-d3 ♕f5-g6 ♖d3-d2 ♕g6xc2+ ♔b1xc2 ♖f8-f7 ♖e7-e8+ ♖f7-f8 ♖e8xd8 ♖f8xd8 ♖d2-d6 h5-h4 ♖d6xb6 ♖d8xd7 a4-a5 ♖d7-d4 a5-a6 ♖d4-a4 b2-b4 ♔g8-f7 ♖b6-b7+ ♔f7-g6 a6-a7) +6.33/42 235) score for White +6.33 depth 42.

Mar-10-22		JohnBoy: Ten years before the brilliant Denker vs Botvinnik, 1945 game, and all the fun it introduced.

Mar-10-22		Honey Blend: I'd play 18. g4 in a heartbeat, thinking 18. ... fxg4 19. ♗xh7+ leads to mate. And if 18. ... h6 19. gxf5 hxg5 20. hxg5 should be more than enough compensation for the sacrificed piece: click for larger view

Mar-10-22		al wazir: I had the same idea as <Honey Blend>: 18. g4. If 18...fxg4, then 19. Bxh7+ Nxh7 (19...Kh8 20. Nf7#) 20. Qxh7+ Kf8 21. Qh8#. After 18...g6 19. h5, white opens the h-file and attacks along the file with ♖s and ♕. I think that must win.

Mar-10-22		agb2002: White has a bishop and a knight for the bishop pair. White can weaken the position of the black king with 18.Bxf5: A) 18... exf5 19.Qb3+ A.1) 19... Kh8 20.Nf7+ Kg8 21.Nh6+ Kh8 22.Qg8#. A.2) 19... Be6 20.Nxe6 A.2.a) 20... Nxe6 21.Qxe6+ and 22.Qxf5 wins two pawns. A.2.b) 20... Qb8 21.Ng5+ and mate in three at most. A.2.c) 20... Qd7 21.Nc7+ (21.Ng5+ Qd5 wins a pawn) wins an exchange and a pawn. A.3) 19... Ne6 20.Nxe6 A.3.a) 20... Bxe6 21.Qxe6+ transposes to A.2.a. A.3.b) 20... Qb8 as in A.2.b. A.3.c) 20... Qd7 21.Nc7+ as in A.2.c. B) 18... g6 19.Bd3 followed by h5 must be winning. C) 18... Bxg5 19.Bxh7+ C.1) 19... Nxh7 20.hxg5 Nf8 21.Ne5 C.1.a) 21... Nd7 22.Qh7+ Kf8 23.Qh8+ Ke7 24.Qxg7+ Kd8 25.Qg5+ Nf6 (25... Re7 26.Rh8+ Nf8 27.Rxf8#) 26.Qxf6+ Qe7 27.Nxc6+ wins. C.1.b) 21... bxc5 22.g6 (threatens Nf7 and Rh8#) must be winning. For example, 22... cxd4 23.Nf7 Nxg6 24.Qxg6 Kf8 (24... Qxf7 25.Rh8+ Kxh8 26.Qxf7 wins) 25.Rh8+ Ke7 26.Qxg7 Rxh8 27.Nxh8+ Kd6 28.Rxd4+ Kc5 29 Qxc7. C.2) 19... Kh8 20.hxg5 is winning. C.3) 19... Kf7 20.Nxg5+ wins two pawns.

Mar-10-22		saturn2: I went wrong thinking of 18.Nxh7 followed by g4 and getting an open g file for the piece. In the game 9...h6 is good though white can answer h4 and black not take the Bg5.

Mar-10-22		Teyss: <Brenin> Technically it's not a smothered mate but a... er... crammed mate? click for larger view Interestingly <mel gibson>'s SF prefers 18...exf5 as per <agb2002>'s A.3.a line. Easy puzzle if Black accepts the sac but rather difficult if he doesn't.

Mar-10-22		chrisowen: Rig baroque Bxf5 hob ar cuff muff v it v i brain v it v i sub ring baroque eyes yes sew it wicket dr c cringe bag quabble evict quiff juju flush help mop v it we ya puts mr whoosh ok band clung jz it hide fale it v dud lid roof v it is he for good fudge of muddle it v ar lovely gaff fobs ooh had ooh fed do clock it v a blush bid x i bad nib dog hit cerberus he v it skims v castigated flesh lergi it wag c elf dud bob c cab c bud jet flog hog jib c fed it v i fib c md c god elf jug hob ji v it lad c fide v it v gnaw it sell cd ft bag hard bot feet it v sac bereft ask mib goof el job u gob boo file it v jum guild it well barts dug wire blast lit v it brat frees ok dt ludo grew ill it v bats bob log jo vem if loo bug job mile fig v it wu id stella brig lud v it i wool bog ji v it fume it in Bxf5 clung!

Mar-10-22		goodevans: <Easy puzzle if Black accepts the sac but rather difficult if he doesn't.> ... and it helps if you know it's a puzzle. In a game I'd have probably gone for <18.Bc4> which is easier to calculate so less chance of me messing up. The threat of 19.Qxf5 is almost impossible to prevent since <18...g6 19.h5> is just asking for trouble. <Honey Blend> and <Al wasir>'s 18.g4 also looks good.

Mar-10-22		Rama: Bogo played for Ukraine, while it existed. I've always called Qc2 against my Bb4 in the Nimzo, the 'Boguljubov move.'

Mar-10-22		parch: Had gone for 21.Ne5 Qe7 22.g6.

Mar-10-22		Cellist: I also chose 18.g4. According to the engine, it wins, too, albeit less clearly than the text move: +2.53 (25 ply) 18.g4 Bxg5 19.hxg5 Qf4 20.Ne5 Qxd4 21.Qe2 Qf4 22.gxf5 exf5 23.Ng6 Rxe2 24.Nxf4 Re7 25.Bc4+ Be6 26.Rhe1 Rae8 27.Nxe6 Nxe6 28.Rd6 Kf7 29.Re5 f4 30.cxb6 axb6 31.Rxc6 h6 32.gxh6 gxh6 33.Re4 Kf6 34.Rxb6 h5 35.Rxf4+ Kg5 36.Re4 Nc5 37.f4+ Kh4 38.Rxe7

Mar-10-22		raymondhow: This one seemed rather tough for a Thursday. The first move was fairly easy once I saw the smothered mate threat, but the following moves were difficult. Instead of 22 g6 I chose 22.Qe4, which Bogo played on move 23. The engine says it leads to an even greater advantage, so I take full credit.

Mar-10-22		Check It Out: I saw this line so I guess that's a solve: 18. Bxf5 exf5 19. Qc4+ Be6 20. Nxe6 Nxe6 21. Qxe6+ Kh8 22. Qxf5 But as I walked through the game black didn't play what I expected and I did not correctly anticipate whites moves.

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