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Mark Taimanov vs Mikhail Beilin
URS-ch sf (1955), Leningrad URS, rd 15, Dec-??
Semi-Slav Defense: Accelerated Meran Variation (D45)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-22-18  stst: <...hallucinations..> haullu... succumbs to factual analysis like FSR did, Kh2 is the clear walk-away, for, as said and seen before, once the B@f4 is gone, the Black Q has no threat at all.

Also against Stkfsh
♔g3-f2
I would simply intercept by Rf3, if R-exchange, White prevails QB v R if no exchange, say e4, even easier, Qg7#
if else, Black lacks any threat, and Qf7 then f8 would be pretty conclusive... May be why Stkfsh could not climb to the top out of Houdini and Komodo because of lacking such human juice!?

Jan-22-18  saturn2: I saw 29 RxBf4 after which black

a. has to open the deathbringing diagonal for the bishop Bb2 or

b. Gets massacred on rhe f file by the rooks

Jan-22-18  evzal86: lentil you made me laugh! ☺
Jan-22-18  WorstPlayerEver: I put this mel gibson on ignore; indecipherable blurk.
Jan-22-18  radtop: Why didn't Black play 28...Rxf7?
Jan-22-18  NBZ: <radtop> 29. Qc8+ wins back the rook, but you are right that this looks better for Black than the game. I suspect Black completely missed the Rxf4 idea, and if so 28. ... Qg3 threatening mate and seemingly winning an exchange looks very promising. 29. Rxf4 must have come as a nasty shock!
Jan-22-18
Premium Chessgames Member
  agb2002: White has an extra pawn.

Black threatens Qh2# and Rxf7.

The pawn on e5 blocks the action of the white bishop. Therefore, 29.R1xf4:

A) 29... exf4 30.Rg7+ and mate in three.

B) 29... Qe1+ 30.Kh2 (30.Rf1 Qxf1+ 31.Rxf1 Rxf1+ 32.Kh2 also wins but much slowly) and the threats Rxf8# and Rg7+ and mate in two are decisive.

C) 29... Qxf4 30.Rg7+ Kh8 31.Rxh7+ Kg8 32.Qg7#.

D) 29... Rd8 30.Rg4+ wins.

Jan-22-18  sotto voce meo: Mondays I usually get at first glance, but this one is beyond me.
Jan-22-18  mel gibson: < WorstPlayerEver: I put this mel gibson on ignore; indecipherable blurk.>

You're so rude.
Well I thought you could add the move numbers yourself. What do you want for free?
That is how the game is saved in Arena - without numbers and it fits in less space.
Here it is if you add the move numbers:

mel gibson: Does mate in 13 qualify for very easy?

Stockfish 8 says:

29 ♖f1xf4 ♖f8-d8
30 ♖f4-g4+ ♕g3xg4
31 h3xg4 ♖d8-d1+
32 ♔h1-h2 ♖e6-h6+
33 ♔h2-g3 ♖d1-d3+
34 ♔g3-f2 ♖d3-d2+
35 ♔f2-e3 ♖d2-d1
36 ♕b7-e7 ♖d1-e1+
37 ♔e3-f2 ♖e1-f1+
38 ♔f2xf1 ♖h6-h1+
39 ♔f1-f2 ♖h1-f1+
40 ♔f2xf1 ♔g8-h8
41 ♖f7-f8+

+M13

Mate in 13

Jan-22-18  leRevenant: Man it took me a long Taim to get the better Ov this one, Mark my words.
Jan-22-18  radtop: <NBZ> Thanks, I totally missed that.
Jan-22-18  gofer: Though <29 R1xf4> is rather tricky for a <Monday>, I was intrigued enough to wind back the position a couple of moves to see what went on to get here.

<28 Rxf7!> is rather devastating, in hindsight, so black can't play <27 ... Qg5> as either Pf7 or Re6 needs to be protected.

It is amazing how quickly white manages to exploit black's weakened pawn structure after <21 Nxf6 gxf6>, but <21 ... Qxf6> doesn't look much better!

Jan-22-18  malt: I'm sticking with <29.R1:f4>

Keeping my head down below the parapet
from the dissent in the ranks.

Jan-22-18
Premium Chessgames Member
  thegoodanarchist: < Phony Benoni: ...

Not one of your typical Monday puzzle..>

Right!

Obviously White must either check or capture the bishop, to thwart Black's mate threat on h2. But we need to do a little thinking to decide which rook, and a little more to decide that it is a clear-cut loss for Black.

Time-wise it took me about a Wednesday's puzzle-worth of time to solve.

Jan-22-18  zb2cr: 29. R1xf4 is in order, since Black is threatening mate. The two obvious responses:

29. ... exf4; 30. Rg7+, Qxg7; 31. Qxg7#.

29. ... Qe1+; 20. Kh2 and White has mate threats at both g7 and f8.

Jan-22-18  et1: This is not very easy because of the 28 Rx f7 and 29 Qc8 problem pointed out by radtop and thankfuly solved by <NBZ>. I did not see Qc8 so I hesitated in the solution and in Very Easy that should not happen Thank you
Jan-22-18  Mayankk: Seems like an elimination of options puzzle. White has to force the issue since Black has a mate otherwise on h2. However none of the usual Rook Sacs lead to mate. The only other alternative is to forcefully disrupt the mating combo of Bishop and Queen. So maybe we take the Bishop with our Rook. But then which Rook - taking with the f7 Rook doesn’t help. And then it all falls in place. Taking with f1 Rook has the unexpected side benefit of an easy mate on g7, should the Rook be captured back. And so we are a piece up already with an impossible to stop attack.

And there’s the way I solved it :)

Jan-22-18
Premium Chessgames Member
  gawain: First I saw the possibilities for white along the 7th rank. Then I noticed that Black threatens checkmate on the move. (Always look to see that your opponent is threatening!) Soon enough I appreciated the merits of R/1xf4 which both removes Black's mate threat and deflects his queen from the crucial g7 square. Black's goose is cooked.
Jan-22-18
Premium Chessgames Member
  patzer2: For today's Monday puzzle (29. ?), it was easy to see 29. R1xf4! wins a piece.

What would not be so simple is calculating the quickest route to mate in a time crunch or blitz game.

Stockfish 8 @ 51 ply gives the three longest mating lines as 29...Rd8 30. Rg4+ (mate-in-twelve), 29...Rfe8 30. Rg4+ (mate-in-ten), and 29...Qe1+ 30. Kh2 Qg3+ 31. Kxg3 exf4+ 32. Rxf4 Rg6+ 33. Rg4 Rxg4+ 34. hxg4 Rf7 35. Qa8+ Rf8 36. Qd5+ Rf7 37. Qg4+ Kf8 38. Qd8# (mate-in-nine).

Black's game goes bad with 27...Qg5?, allowing 28. Rxf7! Rxf7 29. Qc8+ Kg7 30. Qxe6 Rf6 31. Qe7+ Rf7 (31...Kg6? 32. Rxf4! Qxf4 33. Bxe5 Qc1+ 34. Kh2 Rc6 35. a4 +-) 32. Qxg5+ Bxg5 33. Bxe5+ ± to +- (+2.02 @ 31 ply, Stockfish 8).

Instead, Stockfish 8 indicates 27...Rg6 = (0.00 @ 37 ply ), 27...Rc6 = (0.00 @ 37 ply), 27...Rf6 (0.00 @ 37 ply) or 27...Qg6 (0.00 @ 37 ply) would have held it level.

Black's game goes from bad to worse with 28...Qg3? allowing today's Monday puzzle solution 29. R1Xf4! +- (mate-in-13, Stockfish 8 @ 44 ply). Instead, 28...Rxf7 29. Qc8+ kg7 30. Qxe6 Rf6 31. Qe7+ Rf7 32.Qxg5+ Bxg5 33. Bxe5+ Kg6 34. Rd1 Kf5 35. Bg3 ± to +- (+2.02 @ 30 ply, Stockfish 8) would have put up much more resistance.

Jan-22-18  morfishine: White embarrasses Black <29.Rxf4> snaring a Bishop and/or forcing Black to part with his Queen leaving him with a fatal material deficiency

*****

Jan-22-18
Premium Chessgames Member
  Jimfromprovidence: I liked the variation (if it got that far)

29 R1xf4 Rxf7 30 Qf7+ Kh8 31 Qxe6 Qxf4 32 Bxe5+.


click for larger view

Jan-22-18  lion100: mel gibson you asked Does mate in 13 qualify for very easy? on 31 white takes the black queen with a check that's enough to be easy.
Jan-22-18
Premium Chessgames Member
  cu8sfan: Either I'm getting worse or this was a hard Monday. Well, it goes well with being back from vacation and the rain and all... *sigh*
Jan-22-18
Premium Chessgames Member
  whiteshark: <29.R1xf4!>, and that's it.
Jan-22-18  Bubo bubo: 29.R1xf4 removes Black's threat on h2 and wins a piece, because 29...exf4 would open the long diagonal and allow 30.Rg7+.

As mentioned before: not the typical Monday!

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