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Boris Spassky vs Florin Gheorghiu
Moscow (1971), Moscow URS, rd 2, Nov-25
King's Indian Defense: Saemisch Variation (E80)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
May-15-20  Helios727: After 37... Rf6, Stockfish could not find a winning line for White. Is there one?
Jun-24-20
Premium Chessgames Member
  carpovius: <Helios727: After 37... Rf6, Stockfish could not find a winning line for White. Is there one?>

37...Rf6 38. Bb8

Jun-24-20  Granny O Doul: I remember from watching Gheorghiu that he was quite prone to zeitnot, and it appears that actual time forfeits were not such a rarity.

Btw, I know the word "zeitnot" only from chess books; it was not part of the spoken vocabulary of my crowd. Nonetheless, I like the term better than "time trouble" or "time pressure" and so I choose to use it here.

Jun-24-20  ewan14: Boris still defeating the Kings Indian with the Saemisch. Now which very famous Kings Indian player did not like playing against the Saemisch ?
Jun-27-20  Helios727: carpovius, 37... Rf6 38. Bb8 Nd7 and now if the dark squared Bishop takes the a7-pawn it traps itself.
Jun-28-20
Premium Chessgames Member
  carpovius: <Helios727> 37...Rf6 38. Bb8 Nd7 39. Bxa7 and then a5. Where's a trap?
Jun-30-20  Helios727: The d7-knight protects the b6-pawn and the guards the b8 square, which means the Bishop on a7 cannot move.
Jun-30-20
Premium Chessgames Member
  carpovius: <Helios727> you miss again White's a5 resource.
Jun-30-20  Helios727: Which means Black wins the a5-pawn and the a7 Bishop is still trapped.
Jul-01-20
Premium Chessgames Member
  carpovius: How about this (arguably White wins)? 37...Rf6 38. Bb8 Nd7 39. Bxa7 Rf2+ 40. Kb3 Nhf8 41. Bg4 Ke7 42. Rh3 Rg2 43. Bf3 Rd2 44. h5 Rd6 45. h6 Nf6 46. Bb8 Rd8 47. Bc7 Rd3 48. Bxb6

Trying to beat Stockfish-I :-)

Jul-01-20
Premium Chessgames Member
  carpovius: or this (arguably White loses by Zugzwang) 37...Rf6 38. Bb8 Nd7 39. Bxa7 Nhf8 40. h5 e5 41. Bxd7 Nxd7 42. Rh3 Rh6 43. a5 bxa5 44. Kb3 Nf6 45. Re3 Ke6 46. Ka4 Rxh5 47. Kxa5 e4 48. Kb5 Re5 49. Kc6 Nd7

Trying to beat Stockfish-II :-)

Complicated finish... Perhaps Gheorghiu should resist more. But most likely I miss some winning lines for both sides.

Jul-01-20  Helios727: carpovius, Stockfish would not play 39... Rf2+, so that eliminates that line. It would not play Bb8 or Bxa7 either, but if you force it to, it still would not play 40. h5, so that eliminates the second line.
Jul-02-20
Premium Chessgames Member
  carpovius: On 37... Rf6 Stockfish says:

1) +1.08 (21 ply) 38.Re4 Ng6 39.Bb8 Nhf8 40.h5 Ne7 41.Kb3 Nc6 42.Bf4 Kg7 43.Kc2 e5 44.Bxe5 Nxe5 45.Rxe5 Rf2+ 46.Kb3 Rh2 47.Bg4 Rh4 48.Bc8 Kf6 49.Rf5+ Ke7 50.a5 Nd7 51.axb6 axb6 52.Bxd7 Kxd7

You see its moves? Such a "it would not play")))

Jul-04-20  Helios727: But you need to redo the analysis after each half move in order to know what Stockfish would really do. In addition, your analysis (this time) shows Rf2+ on move 45 instead of 39 as your earlier analysis showed.
Jul-04-20  Howard: This game has certainly gotten a lot of ‘press’ in the last week weeks, but why?
Jul-05-20
Premium Chessgames Member
  carpovius: < Howard: This game has certainly gotten a lot of ‘press’ in the last week weeks, but why?>

If by 'press' you mean the above kibitzes then I see at least three reasons 'why?' 1. The endgame looks quite complicate here and as Helios727 stated Stockfish cannot find a winning line. 2. I did my analysis of this endgame trying to beat the machine and... arguably failed. 3. A winning line for White remains open question (for both machine and human analysises) but looks like Gheorghiu resignation was premature.

Jul-05-20
Premium Chessgames Member
  beatgiant: <carpovius>
As <Granny O Doul> pointed out above, it's pretty likely Gheorghiu lost on time here.

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