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Cenek Kottnauer vs David Bronstein
Moscow-Prague (1946), Moscow URS, rd 5, May-??
King's Indian Defense: Fianchetto Variation. Classical Fianchetto (E67)  ·  0-1



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Given 7 times; par: 82 [what's this?]

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Kibitzer's Corner
Dec-17-06  mig55: This one was the puzzle of the belgian paper "de morgen" this week...
Dec-17-06  syracrophy: There's no way to avoid mate and promotion at the same time:

<a)> 59.h3 ♖g1+ 60.♔h2 ♖xg3! 61.♖b1<61.Kxg3 e1=Q+ > 61...♖g1!

<b)> 59.♗f2 ♖g1+!! 60.♗xg1 <60.Kxg1 e1=Q +> 60...e1=♕+

<c)> 59.f8=♕ <50.f8=N+ Kg8! > 59...♖g1#

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  al wazir: How would black have won if white had played 56 Rd2 ? If 52...Rxc7 then 53. Rxe2 Rxf7 54. Rb2 Rb7 55. Be5 Ba3 56. Rb1. Now what?
Dec-17-06  goldfarbdj: al wazir: I don't think 53. ... Rxf7 looks best. How about 53. ... Rc2? There might follow 54. Rxc2 bxc2 55. Bf4 Bd6!! 56. Bc1 (if Bxd6 then c1Q+ 57. Kg2 Qd2+ 58. Kg3 Qxd6) Kg7 and I think black should win -- he plays his king up to f5 and then Bf4, while making sure that h3 can always be met by g3.
Premium Chessgames Member
  al wazir: <goldfarbdj>: I think you're right. Since Bronstein had to consider this line as well as the one played in the game before making the move 54...b3 (instead of the more obvious 54...Kg7), he must have analyzed the position even more thoroughly than it first appears.
Premium Chessgames Member
  Gypsy: <goldfarbdj, al wazir> 56.Rd2 Rxc7 57.Rxe2 Rxf7 58.Rb2 Rf3 59.Be5 Bg7 60.Bxg7 Kxg7... is an easy win for Black. (For instance, ... 61.Kg2 Kg6 62.Kh1 Kg5 63.Kg1 Kh4 64.Kg2 Rc3 65.Kf1 Rc1+ 66.Ke2 Rc2+ 67.Rxc2 bxc2 68.Kd2 Kh3 ... 0-1.)

I submitted the game to the database a few month back. The combo appears in two of Kotov's books (Soviet Chess School, and Alekhine's Chess Inheritance). Kotov used it to illustrate how tactics can augment pure endgame technique. But I could not find the whole score untill I stuck gold in <Bronstein on KID>.

Premium Chessgames Member
  al wazir: <Gypsy>: I have _Alekhine's Chess Legacy_ (in Russian). How did you find this Bronstein game in it? "Bronstein" doesn't even occur in the index.

56. Rd2 Rxc7 57. Rxe2 (I screwed up the numbering in my first post, as usual) Rxf7 58. Rb2 Rf3 59. Kg2 Kg6 60. h3 Kg5 61. hxg4 Kxg4 62. Be4 Ba3 63. Rb1.

There may be a win for black here, but I don't call it easy.

Premium Chessgames Member
  Gypsy: <al wazir: ... I have _Alekhine's Chess Legacy_ (in Russian). How did you find this Bronstein game in it? >

Czech translation, Jiri Vesely translator, 1960, Vol. 2, Chapter XIV : Alekhine and the Creations of Soviet Chessplayers, Technique in the endgames, pg. 405. Kottnauer is not mentioned by name (as he escaped to England and was a persona non-grata).

<56. Rd2 Rxc7 57. Rxe2 Rxf7 58. Rb2 Rf3 59. Kg2 > Rd3 still looks to win for Black. (Similarly 59...Rc3 60.Be5 Rd3; but not 60...Rc2+? 61.Kg3 Bd6 62.Kxg4! Bxe5 63.Rxb3 Rxh2 =.)

Dec-18-06  mig55: He can even play Bd6 first, white can't do anything against the following Bc5....
Premium Chessgames Member
  al wazir: <Gypsy>: Thanks. Yeah, I found it on p. 601. It doesn't analyze the move I suggested. I still think it's wrong to call that line "easy."
Premium Chessgames Member
  plang: Kottnauer was likely familiar with Bronsteins brilliancies versus Zita and Pachman which may explain wht he closed the center with 8 d5. 25 Nd5 was a clever pawn sacrifice which gave White good queenside play. In time pressure Bronstein missed the best continuation 31..fxe 32 Rxc7..Nxf3+ 33 Kh1..Qxc7 34 Nxc7..Nd4 35 Rxf8+..Rxf8 36 Qd3..e2. Blacks winning line after 51 Bd6 would have been 51..Kg7 52 Be5+..Kg6 53 Bd6..e2 54 Re1..Bxd6 55 cxd..Kxf7 56 Rxe2..Ra6 57 Rb2..Rxd6 58 Rxb5..d4.

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