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Efim Bogoljubov vs Akiba Rubinstein
Stockholm (1919), Stockholm SWE, rd 3, Dec-04
Queen's Gambit Declined: Three Knights Variation. General (D37)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Jan-25-06  fred lennox: If 27...gxf5 is weak. 28.Nxf5...Qb4 (if...Qd8...Nd6+) 29.Nh6+...Kg7 30.Nxf7...Kxf7 Ne5 double check and black is in hot soup.
Jul-12-15
Premium Chessgames Member
  tamar: 29...gxf6 though would have been strong.
30 Nxf5 Be6! stops the attack.


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Mar-19-24  Allderdice83: After, incredibly, missing yesterday's, it was nice to get this one.

The clue was realizing that Black was threatening mate with 36 ... Qg2+, then 37 ... Qxh2#, or if the knight moves at move 36, then 37 ... Qg4#. That meant White's first move has to either be a check or removing one of the threatening pieces. Obviously, 36. Qe7+ does nothing, so 36. Rxf3 is the choice. Now, since the next move doesn't have to be a check, White can prepare to use the h file to attack the Black king. Hence, 37. Re4. After this, nothing Black does can prevent a mating attack; eg.,

37...Qb4 38. Rh4+ Kg8 39. Rh8+ Kf7 40. Rh7+ Kf8 41. Qh8#

Mar-19-24
Premium Chessgames Member
  takebackok: Had to think a bit, not a normal Tuesday puzzle.
Mar-19-24  mel gibson: A tough one for a Tuesday.
I wasn't sure.

Stockfish 16 says:

36. Rxf3

(36. Rxf3 (1.Rxf3 Qxe1 2.Qxe1 Rxf3 3.Qe7+ Kh8 4.Qe5+ Kh7 5.Qxd4 Rf7 6.Ne4 c5 7.Nf6+ Kg7 8.Qe5 c4 9.Kg4 c3 10.bxc3 Kf8 11.Qe6 Rfc7 12.Qg8+ Ke7 13.Qg7+ Kd6 14.Ne4+ Kd5 ) +7.80/43 542)

score for White +7.80 depth 43.

Mar-19-24
Premium Chessgames Member
  Check It Out: I got yesterday, but did not spot 37.Re4 today.
Mar-19-24  jffun1958: White threatens 38.Rh4+ Kg8 39.Rh8+ Kf7 40.Rh7+ Kf8 41.Qh8#
and in takes the Q to avoid this.
For example: 37...Qxg5 38. Qxg5 Rcf8 39. Qe5 R8f6 40.Rh4+ Kg7 41.Qc7+ Rf7 42.Qc8 Rf8 43.Qxb7+ R3f7
Mar-19-24
Premium Chessgames Member
  Teyss: I'm with <Check It Out>, found this harder than yesterday and than a standard Tuesday. 37.Re4! is a quiet move that seems obvious... after you see it.
Mar-19-24
Premium Chessgames Member
  chrisowen: I quark its hoof muddle its ya v Rxf3 abridge its axled its hoh its adagio nag banal its u back Rxf3 its ear;
Mar-19-24  TheaN: I was stumped for a long whilst wanting to play 36.Qe7+ first and then Rxf3. Though it seems White has all kinds of potential forks on Rc8, the issue is that the knight can't really assist the queen and Re1 is undefended if the queen moves off the e-file, and Qe7+ first allows Black's king off the h-file.

As per usual, the threat is more powerful than the execution: <36.Rxf3 Rxf3 (Qxe1 37.Qxe1 +- is best for Black) 37.Re4! #10>: with Rh4-Rh8+ and/or Qe7+ looming is much stronger, because the queen does plenty on e5 and now Black has to deal with the tempo loss on the h-file also. Long story short, he can't deal with it: 37....Qxg5 is #10, anything else is faster.

Mar-19-24  King.Arthur.Brazil: Obviously the best B defensor is the ♗, so eliminate it: 36. Rxf3 Rxf3 37. Re4 Qf2 38. Rh4+ Kg8 39. Rh8+ Kf7 40. Rh7+ Kf8 41. Qh8#
Mar-19-24
Premium Chessgames Member
  GoldenKnight: Had to think a bit on this one. Not that easy, but I did get it.

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