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Oleg Moiseev vs Tigran V Petrosian
Moscow Championship (1968), Moscow URS
English Opening: Great Snake Variation (A10)  ·  0-1



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Kibitzer's Corner
Dec-27-09  ughaibu: Great endgame combination from move 43.
Premium Chessgames Member
  beatgiant: <ughaibu>
I don't see any big advantage for Black after 44. Nc2.

I don't see any big advantage for Black after 50. Be2. If then 50...e4 51. Kc3 holds back the attack.

To me it looks more like <great endgame collapse from move 50.>

Dec-28-09  ughaibu: If 50.Be2, what can white do against the black king coming to f4?
Premium Chessgames Member
  beatgiant: <ughaibu>
The black king coming to f4 and then what? Say 50. Be2 Kg6 51. Kc3 Kg5 52. Bd3 Kf4 53. Kd2 e4 54. Be2 Ke5 55. Kc3. If the knight ever stops covering c5, White plays c5. Again, I don't see a big advantage for Black.
Dec-28-09  ughaibu: Yes, you may well have a point. How about this: 50.Be2 Kf6 51.Kc3 e4 52.Kd4 Nb3 53.Kc3 Na5 54.c5 c5 55.Ba6 Ke5 56.Bc8 f4 57.Be6 e3?
Premium Chessgames Member
  Chessical: <ughaibu> In your line:

<50. Be2> Kf6 51. Kc3 e4 52. Kd4 Nb3+ 53. Kc3 Nxa5 54. c5 dxc5 55. Bxa6 Ke5

click for larger view

Creating a passed <h> pawn seems to me to hold the position for White:

56. g3 hxg3 57. fxg3 Kxd5 58. h4 Ke5 59. h5 Kf6 60. h6

click for larger view

60... Kg6 61. Bc8 e3 62.Bxf5+; =

Premium Chessgames Member
  beatgiant: <ughaibu>
Even if we stipulate that all the moves in your line are best (I don't have time to analyze), I don't see what Black has in your final position after the further 58. fxe3 fxe3 59. Kd3.
Premium Chessgames Member
  beatgiant: In the game line, I suggest <53. Bf1> as a tougher defense. Then if 53...Ne4 <54. c5> makes it much more tricky for Black to win, if at all possible.

For example, 53. Bf1 Ne4 54. c5 dxc5+ 55. Kc4 Ng3 56. Bd3 f1=Q 57. Bxf1 Nxf1 58. d6 Kf7 59. Kxc5 Ke8 60. Kb6 Kd7 61. h5 is not the way.

But Black need not hurry to remove the knight from its blockading c4 post. Maybe 53. Bf1 Kf6 aiming to win the bishop in better circumstances.

Dec-30-09  ughaibu: Okay, thanks for all the analysis, both of you. How about if I call it a great combination that increased the scope for a decisive result? Do combinations that are purely competitively motivated take aesthetic values?
Premium Chessgames Member
  beatgiant: <ughaibu>
<43...Qxc3+> looks like a better ending for Black as well, but you're probably right that the game line <increased the scope for a decisive result>.

In that case, an apt description would be <a beautiful trap>.

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