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Andreas Dueckstein vs Haije Kramer
Moscow ol (Men) fin-B (1956), Moscow URS, rd 11, Sep-24
Caro-Kann Defense: Karpov Variation (B17)  ·  1-0

ANALYSIS [x]

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sac: 31.Rxe6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Jul-27-16  greed and death: White would love to get some action going on along the b1-h7 diagonal using his Bc2 and queen. However, both f5 and g6 are guarded by pawns.

This suggests 31. Rxe6 fxe6 32. Rxe6 (Qg6+ would be premature here because 32 Qg6+ Kf8 allows the king to escape), with mate or decisive loss of material to soon follow

Jul-27-16  ozu: Well I got this one pretty quickly. Those two pawns really get in the way and are totally worth a rook!
Jul-27-16  zb2cr: 31. Rxe6, threatening mate by Qxh6#, begins the sequence. Black doesn't seem to have any good way of refusing. 31. ... fxe6; 32. Rxe6 renews the threats on Black's Bishop at a6 and the attack at h6--no longer mate in 1 but now mate in 2 by Qxh6+, Kf7; Qf6#.

Black doesn't seem to have a good defense, e.g., 32. ... Rh8; 33. Qg6+, Kf8; 34. Rf6+, Ke7; 35. Qg7+, Kd8; 36.Qxh8+, Ke7; 37. Qg7+, Kd8; 38. Qf8+, Kd7; 39. Rf7+ wins the Queen.

Jul-27-16
Premium Chessgames Member
  Penguincw: My first thought was to play 31.Rg5+, hoping for 31...hxg5 32.Qh7+ Kf8, but that doesn't lead to anything.

I did find 31.Rxe6 fxe6 32.Rxe6, but had no idea what black would followup, and I am, once again, surprised that black resigned before white responded.

However, white is an IM, and black probably knew white saw 33.Qg6+ Kh8 34.Qxh6+ Kg8 35.Rg6+ Kf7 36.Qh7+ Kf8 37.Rg8# 1-0, or alternatively, 33...Kf8 34.Rf6+ Ke7 35.Rf7+ Ke8 36.Qg8# 1-0.

Jul-27-16  gofer: After <31 Rxe6 fxe6 32 Rxe6 Rc8> there is nothing black can do to defend against the mating threats as black has none of its own and white has so many! But resigning after making a move does seem odd (as <Penguincw> says). One possible finish is...

<33 Qxh6+ Kf7>
<34 Qg6+ Kf8>
<35 Rf6+ Ke7>
<36 Rf7+ Kd8>
<37 Qg8#>

Jul-27-16
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens 31... Rxc2 and 31... Bxc4.

White can further expose the black king with 31.Rxe6:

A) 31... fxe6 32.Rxe6

A.1) 32... Rxc2 33.Qxh6+ Kf7 34.Qf6#.

A.2) 32... Qd8 33.Qg6+ Kf8 (33... Kh8 34.Qh7#) 34.Qf5+ Kg7 35.Rg6+ Kh7 (35... Kh8 36.Rxh6+ Kg7 37.Rh7#) 36.Rxh6+ Kxh6 37.Qh7#.

A.3) 32... Rh8 33.Qg6+ Kf8 34.Re8#.

A.4) 32... Rgd8 33.Qxh6+ Kf7 (33... Kg8 34.Rg6+ Kf7 35.Rg7+ Ke(f)8 36.Qh8#.

A.5) 32... Kf8 33.Re8+ Kg7 34.Qg6+ Kh8 35.Q(R)xg8#.

A.6) 32... Rd1+ 33.Kh2 (or 33.Bxd1 + -) 33... f3+ 34.g3 does not solve Black's problems.

B) 31... Rh8 32.Qg4+ Kf8 33.Re8#.

C) 31... Kf8 32.Qxh6+ Rg7 33.Re8#.

Jul-27-16  morfishine: <31.Rxe6>

*****

Jul-27-16  The Kings Domain: Nice puzzle and a good mating web spun by white.
Jul-27-16  Virgil A: Kramer couldn't Dueck
Jul-27-16
Premium Chessgames Member
  kevin86: Black's position is totally collapsed!
Jul-27-16
Premium Chessgames Member
  TheTamale: Better for Black was 32) ... Ra8 and then resigns.
Jul-27-16  WorstPlayerEver: 26... Kf6 would have been a far better move for Black.
Jul-27-16
Premium Chessgames Member
  patzer2: 26...Kh7? was the losing move.

Instead, <WorstPlayerEver>'s suggestion 26...Kf6 27. Qh5 Rh8 28. Rad1 Rxd1 29. Rxd1 Qe5 30. Qxe5+ Kxe5 = (0.24 @ 23 depth, Deep Fritz 15) holds.

Jul-27-16  Patriot: <patzer2> 26...Kh7 looks like an amateurish move, because it gives white a lot of initiative starting with 27.Bc2+. What was he thinking??
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