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Valery Salov vs Viktor Korchnoi
"Draw Something" (game of the day Aug-27-2013)
Hoogovens Group A (1997), Wijk aan Zee NED, rd 13, Feb-02
Indian Game: Anti-Nimzo-Indian (E10)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Aug-27-13  psmith: FSR: The German means, roughly

42...Rxe2+ 43.Kg3 g5? (This is a mistake, Knight's moves yields a clear winning position for Black.) (43... Ne6 ; 43...Nd5 ; 43... Ng2! 44.Nd4 Rd2 45.Rc7 e2 ) 44.Rxf4! (44. -- Rg2#) 44...gxf4+ 45.Kxf4= (With win of the black e-pawn and drawing chances for White. Korchnoi saw this variation. Therefore he did not play 42. Rxe2+.)

The meaning seems to be that Korchnoi missed the winning Knight's moves after 42... Rxe2+ 43. Kg3 and only considered 43...Rg2+ yielding drawing chances.

Aug-27-13
Premium Chessgames Member
  FSR: <psmith> Thanks.
Aug-27-13  psmith: (I meant "only considered 43...g5" -- of course.)
Aug-27-13
Premium Chessgames Member
  Penguincw: The 2 pawns on both side prevent a win for black.
Sep-10-17
Premium Chessgames Member
  FSR: I see that I've commented on this game before, which I vaguely remember. I assume the answer is that after 45.Rxf5 Re1+ 46.Kh2 e2 47.Kxg1 e1=Q+ 48.Kg2 Black can't break the blockade, so White holds the draw.
Sep-10-17
Premium Chessgames Member
  al wazir: I can't believe it! I actually got this, the first three moves anyway. Of course I didn't see the continuation in detail, but I guessed correctly that because black's other pieces are immobilized he wouldn't be able to accomplish anything with the ♕.
Sep-10-17
Premium Chessgames Member
  al wazir: Dammit, I see I posted previously. My solution was just recrudescence, so it doesn't count.
Sep-10-17  devere: 45.Rxf5 Rg1+ 46.Kh2 e2 47.Kxg1 e1=Q+ 48.Kg2 and White has a fortress. But there are still some fatal mistakes that White could make, so Black will play on for quite a while.
Sep-10-17
Premium Chessgames Member
  An Englishman: Good Evening: First 7/7 week in a while, but this problem wasn't very hard; pretty clear that the fortress represented White's only hope. And who knows? Perhaps the silicon monsters have found a way for Black to win anyhow.
Sep-10-17  Walter Glattke: The theory for KQ against KRP says, you must Play 51.-Qg2 here. 52.Rf5 Qh2+ 53.Ke3 Qg3 54.Ke4 f6 55.Rh5 seems draw, you cannot get Pf3.
Sep-10-17  MrCarciofo: What about kg2? Black can't move rook or pawn without losing both, and then white can take the pawn with rook or exchange.
Sep-10-17  MrCarciofo: Sorry I didn't see Ra1 and then black promotes or White loses the rook. Sorry guys.
Sep-10-17
Premium Chessgames Member
  malt: I looked at 45.Kg2 first,
Then at
45.R:f5 Rg1+ 46.Kh2 e2 47.K:g1 e1=Q+
48.Kg2 as far as I got
Sep-10-17  clement41: After quickly establishing that 45 Kg2 (the theoretically good square for white's king in these rook endings) leads to an unholdable ending following 45...fg (46 Rxg4, 46 fg, 46 Rxf7+ Kg6 all seem hopeless), I played again through a variation I had quickly dismissed due to the loss of material, 45 Rxf5 Rg1+ 46 Kh2 e2 47 Kxg1 e1Q+, and told myself there must be some fortress here. Then, as <devere> rightly pointed out, for a human there are still many pitfalls ahead. In the ensuing Q vs R endgame, it is all about the right timing into a won pawn endgame for black.
Sep-10-17
Premium Chessgames Member
  patzer2: For today's Sunday puzzle (45. ?), it's obvious White is going to go down a Rook for a Queen. So some kind of fortress will be needed.

With that in mind, I figured it's better to have my pawns connected. So I went for 45. Rxf5, and after the expected 45...Rg1+ it's obvious 46. Kf4?? e2 47. Re5 e1Q 48. Rxe1 Rxe1 -+ is a bust for White.

Therefore the only follow-up that has any hope of survival is 46. Kh2.

Following 46...e2 (not 46...Rf1? 47. Rxf7+ Kg6 48. Re7 =) 47. Kxg1 e1Q+ 48. Kg2, it seems pretty clear the White Rook has to shift back and forth on the 5th rank and the White King will hug, protect and circle its pawn on f3.

However, does it work? I wasn't sure, but I figured it offered White the best chance at a draw by perpetual. The tricky part appears to be figuring out the safe squares to shift the Rook on the 5th rank, when the King is not being forced to move and circle the f-pawn due to a Queen check.

Sep-10-17
Premium Chessgames Member
  offramp: Salov the Sentry.
Sep-10-17  Altairvega: Kg2. What happened to MC in Tbilisi today?
Sep-10-17
Premium Chessgames Member
  thegoodanarchist: I got the first move, then I rested on my laurels.
Sep-10-17
Premium Chessgames Member
  Jimfromprovidence: Black wins if he forces white to give up both a rook and a pawn for the queen. I could not find a way to do this.


click for larger view

In the above position white loses if he blunders and plays plays Rf5, losing after ...Qxf5 gxf5+ Kxf5, below. (A king move instead in the original position preserves the draw).


click for larger view

Sep-10-17  Altairvega: I failed but Carlsen failed more..
And Nakamura and Kajakin and Anand and who else..? A new era with new risen forces at Tbilisi!!
Sep-10-17  RandomVisitor: After 48.Kg2 and a long think Stockfish cannot find a win for black:


click for larger view

Stockfish_17090912_x64_modern: <3.5 hours computer time, 8 cores, TB6>

-8.15/96 48. ... Qe2+ 49.Kg3 Kg7 50.Kf4 Qd2+ 51.Kg3 Qd7 52.Kh3 Qa4 53.Kg3 Qa3 54.Rd5 Qc1 55.Rf5 Qd2 56.Rh5 Qe1+ 57.Kf4 Qf2 58.Rf5 Qa7 59.Rh5 Qa1 60.Rd5 Qc1+ 61.Kg3 Qc2 62.Rh5 Kg6 63.Kf4 Qd3 64.Kg3 Qa3 65.Rd5 Kg7 66.Rf5 Qd3 67.Rh5 Qd1 68.Kf4 Qb3 69.Ke4 Kg6 70.Kf4 Qc3 71.Kg3 Qf6 72.Rd5 Qc6 73.Rh5 Kh7 74.Rf5 Qd7 75.Rh5 Qd3 76.Kg2 Qd1 77.Rf5 Kg6 78.Rh5 Qe2+ 79.Kg3 Qd3 80.Kf4 Qc2 81.Kg3 Kf6 82.Kf4 Ke6 83.Kg3 Qb3 84.Kf2 Qb6+ 85.Kg2 Qe3 86.Kg3 Qc1 87.Kf2 Ke7 88.Rf5 Qc6 89.Re5+ Kd6 90.Rh5 Qc4 91.Kg3 Qc7 92.Kh3 Kc6 93.Rf5 Kb7 94.Rh5 Ka6 95.Rf5 Qc3 96.Rxf7 Qd4 97.Kg2 Qb2+ 98.Kg3 Ka5 99.Rh7 Qe5+ 100.Kg2 Qe2+ 101.Kg3 Qe1+ 102.Kg2

Sep-10-17  RandomVisitor: After 41...Kf6 it looks like black can avoid the fortress


click for larger view

Stockfish_17090912_x64_modern: <26 minutes computer time, 8 cores, TB6>

<-56.87/41 41...Kf6> 42.Nf5 Rxe2+ 43.Kg3 g5 44.Nxe3 Rxe3 45.Kf2 Rb3 46.Rc8 Nd3+ 47.Ke3 Ne5+ 48.Ke4 Rxf3 49.Kd4 Rf4+ 50.Kd5 Rxg4 51.Rc3 Rf4 52.Rc1 g4 53.Rc3 Rf3 54.Rc2 Kf5 55.Re2 Rd3+ 56.Kc5 g3 57.Ra2 Rf3 58.Rg2 Kf4 59.Ra2 Rd3 60.Kb6 Nf3 61.Kb7 Rd2 62.Ra4+ Ke3 63.Ra3+ Kf2 64.Ra6 g2 65.Rxh6 g1Q 66.Rb6 Rd7+ 67.Ka6 Qa1+ 68.Kb5 Nd4+ 69.Kc4 Qc1+ 70.Kb4 Qb1+ 71.Ka5 Ra7+ 72.Ra6 Rxa6+ 73.Kxa6

Sep-10-17  Patriot: <Jimfromprovidence> I noticed that also but was looking at move 57.? I think 57.Rf5 loses to 57...Qxf5 58.gxf5+ Kxf5 59.Kg3 (59.Kf2 Kf4 -+) 59...Kg5 60.f4+ Kf5 61.Kf3 h5 62.Kg3 Ke4.
Sep-10-17
Premium Chessgames Member
  mcb: Very instructive - you are very good players and I learn from the kibitzing as well as the puzzle.
Sep-11-17
Premium Chessgames Member
  Richard Taylor: I saw the game continuation and wondered if White could hold it but rejected it. I just seemed silly to allow a Q. I thought I had found a draw by stalemate instead but I was probably mis-seeing.

Savon did well to find that. Perhaps he knew that such positions are a "fortress" ?

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