Salomon Flohr vs Efim Bogoljubov (1931)

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Salomon Flohr vs Efim Bogoljubov
Prague Olympiad (1931), Prague CSR, rd 9, Jul-17
King's Indian Defense: Fianchetto Variation. Classical Fianchetto (E67) · 0-1

ANALYSIS [x]

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Jul-17-17		lost in space: Took me longer than usual on my beloved Monday. 40...Rg3 41. fxg3 (else 41...Rxh3 mate can not prohibited) 41... Nxg3 mate

Jul-17-17		awfulhangover: Took a long time to find. Since this is Monday, Komodo/Stockfish/Houdini/Fritz will be the only who solve Sunday.

Jul-17-17		MrCarciofo: Placing a piece and no crashing - it's always harder for me to find this kind of moves. But when I manage to I always feel myself as a better player.

Jul-17-17		King Harvest: What the hell kind of Monday was this!? I solved, eventually, but only because I sat there saying, "I am not giving up on a monday..."

Jul-17-17		Pasker: I got this one fairly quickly. From the first look I knew this must be a mate in 2 puzzle for sure and I was sure its the knight is going the deliver mate (typical in these kind positions). After tossing out some candidate sacs, I quickly noticed rg3 which forces mate. Wow nice one!

Jul-17-17		kevin86: Missed a layup on Monday. Black threatens mate, if the rook is taken, the knight mates.

Jul-17-17		dTal: In common with many, I found this challenging. Took me over 3 mts, and I'm pretty sure I only found it because I knew there must be a killing move. Doubt I would have seen it as a concluding move in a combination :-(

Jul-17-17		Halldor: I'm glad to see that I wasn't the only one who found this rather difficult.

Jul-17-17		Iwer Sonsch: 40...Kh5 and 40...c5 force mate in 12 respectively 13 moves. 40...c6 and 40...R8g6 are still clearly winning, as White is forced to play 41.Rc3 to avoid mate.

Jul-17-17		Peligroso Patzer: A puzzle whose solution starts with a quiet move?!? I dunno, some may disagree, but by my lights that seems unfairly tricky for a Monday.

Jul-17-17		whiteshark: No crumbs on the Flohr, please!

Jul-17-17		RandomVisitor: After 28...Nf7 white is looking strong click for larger view Stockfish_17061704_x64_modern: <14 minutes computer time> <+1.30/40 29.Qh4 Qh6 30.Qg3 Qg7 31.Rc4> Bh5 32.Rdc1 Be2 33.R4c3 Nh8 34.Qxg7+ Kxg7 35.cxd6 cxd6 36.Rc7+ Rf7 37.Bd4+ Kh6 38.Rxf7 Nxf7 39.Rc2 Bh5 40.Kh2 b5 41.Bf1 Ra8 42.Rc7 Kg6 43.Re7 Kh6 44.f3 exf3 45.Kg3 a5 46.a3 axb4 47.axb4 Ra3 48.Re3 Rxe3 49.Bxe3 Nd8 50.Bxb5 Bf7 51.Bc4

Jul-17-17		ColeTrane: No brakes all gas

Jul-17-17		ajk68: <ajk68: 37. Bxf3 may not have lost the game, but feels like a positional mistake to me.> Running this through a computer I see it drastically changes the evaluation and does indeed lose the game.

Jul-17-17		JeffH1165: Yeah this one took a couple of minutes to solve. "Monday, Monday can't trust that day . . . "

Jul-17-17		swclark25: Got it...finally. I agree with the tricky Monday kibitzes.

Jul-17-17		steinitzfan: It's short enough to be a Monday puzzle. That's about all. Wisht I could see it over the board.

Jul-17-17		RandomVisitor: A final look after 28...Nf7: white is almost winning click for larger view Stockfish_17061704_x64_modern: <3 hours computer time> <+1.49/47 29.Qh4 Qh6 30.Qg3 Qg7 31.R4d2> Bh5 32.Rb1 Re7 33.a4 Qg6 34.a5 Nh8 35.b5 axb5 36.Kh2 Qxg3+ 37.fxg3 Be8 38.Rc2 Nf7 39.c6 bxc6 40.dxc6 Nd8 41.a6 Bxc6 42.g4 Ba8 43.Rxb5 c5 44.Rd2 Nf7 45.Bf1 Ra7 46.Rb6 Rd8 47.Bxc5 dxc5 48.Rxd8+ Nxd8 49.Rb8 Kf8 50.Rxd8+ Ke7 51.Rc8 Bd5 52.Rxc5 Kd6 53.Rc8 Kd7 54.Rb8 Kd6 55.Kg3 Kc5 56.gxf5 Rf7 57.Re8 Kd4 58.Re5

Jul-17-17		docbenway: I will often solve the Monday puzzle while putting my glasses on but this took a couple of minutes of trial and error and I finally glommed onto that rook move out of desperation and it fell into place.

Jul-17-17		OhioChessFan: I don't feel bad. Flohr missed it too.

Jul-18-17		Razgriz: I was looking at 28. ... Rh2+ 29. Kxh2 Rg2+ 30. Kh1 Ng3#

Jul-18-17		Tiggler: What prevented me from solving this immediately was the thought: "This is a Monday puzzle." After putting that aside, the solution is not so hard to find.

Jul-18-17		perfidious: White's king is allowed to choose between methods of being put to the sword.

Jul-19-17		ChessHigherCat: How ironic, we all thought that this was a rare and complex mate for a Monday puzzle, and here we find a game with the very same mating pattern only a few days later :-)

Jul-19-17		gawain: This one did feel difficult. Had to look away for a little while--a couple of minutes. Second time around the solution came quickly.

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