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Evgeni Vasiukov vs Sergey Makarichev
Moscow-ch (1972)
French Defense: Rubinstein. Fort Knox Variation (C10)  ·  1-0



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sac: 34.Qxe7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Apr-25-19  Fish55: After the sacrifice, black's queen is helpless and he has too many weak pawns to defend.
Premium Chessgames Member
  mike1: I know the game... but SF is actually not that taken by the queen sac. 34...Bxe7 35.Rxf7+ Kh6 36.Rxe7 a6 37.Rxc7 axb5 38.cxb5 Qb1 39.Rb7 Qf5 40.Bf3 Qc5 41.Bc6 Qb4 42.Rd7 Qc5 43.Rf7 Qd4 44.Rc7 Qb4 45.Ra7 Qc5 46.Ra6 Kg7 47.Be4 +0.71....
Premium Chessgames Member
  An Englishman: Good Evening: An easy decision; not even a sacrifice. After the first 3 moves, it becomes clear that at the very worst White has an impregnable fortress, and won't lose this game.
Apr-25-19  Walter Glattke: I had 35.-Kh6 36.Rxe7 g5 37.hxg5 Kxg5 38.Rxc7 Kf5 39.c5 h4 40.b6 axb6 41.axb6 hxg3 42.Ra7 Qb2 -+ Kh8 is a mistake. With -Kh6 black can attack white's castle.
Premium Chessgames Member
  NM JRousselle: After the obvious queen sacrifice, it's clear the game is being played for 2 results. However, it seems to me that Black should have held this.
Apr-25-19  drollere: i went with this ...
34. Qxe7 Bxe7
35. Rxf7+ Kh8
36. Rxe7 Qa5
which looks winning. and three plies is usually as far as i take a puzzle.
Premium Chessgames Member
  ChessHigherCat: I think the key must be arriving at this position where all whites pieces and pawns are protected:

34. Qxe7 Bxe7 35. Rxf7+ Kh8 36. Rxe7 Qa5 37. Rf7 Qd2

click for larger view

At this point, black can either stop white from taking the c-pawn through Qa5 or else stop the king from advancing to f3 but it can't do both, so white will eventually get a passed pawn or mating attack K+R+B

Apr-25-19  stst: QxR is the sac, after which BxQ
RxP+ Kh8 or Kh6 etc
Black's Q virtually helpless to combat with White's R & B...
Apr-25-19  saturn2: To complicated for me. I saw the Q vs R+B+P exchange and that the black queen cannot check the white king because the bishop controls the long diagonal.
Apr-25-19  devere: The Queen sac with 34.Qxe7 is certainly worth a try. The losing move was 35...Kh8. After 35...Kh6 protecting the pawn on g6 Black can hold the position. If 34.Qxe7 Bxe7 35.Rxf7+ Kh6 36.Rxe7 a6 37.Bg8 g5 38.Re6+ Kg7 39.Rxa6 Qb2 40.Bd5 gxh4 and Black has enough counterplay to avoid a loss.
Apr-25-19  newzild: I went for 34. Qxe7, on the basis that after 34...Bxe7 35. Rxf7+ and 36. Rxe7 only White can win as it's easy for him to create a blockade if he wants. However, I only saw the win of the a-pawn when I clicked to move 35 in the game.
Apr-25-19  stacase: I went move for move for the first 7 moves, but instead of 41.Rc6 I would have moved 41.Re6 to block 41...Qe5.

Anyway I'm happy to go that far on a Thursday (-:

Apr-25-19  clement41: After Qe7 Be7 Rf7 Kh6 Re7, white has an excellent position and plays for two results. His pieces are greatly coordinated, his bishop is firmly anchored, and prevents any checks on the long diagonal, his rook is commanding on the seventh, his pawn structure is sound while black’s is crippled. Black’s lonely queen is powerless.
I like SF’s move 36...a6 a lot as it gets rid of a weakness while weakening the white structure supporting the Bishop.
Apr-25-19  JohnBoy: I suppose in the final position that white will have to trade white b for black c pawn. Then keeping the bish on the long diagonal (to limit black’s pesky checks) and advance the remaining c pawn.

I would have probably played longer, but my opponents were never Vasiukov.

Apr-25-19  Ceri Evans: I saw the move and thought that Black's Queen might struggle with no targets.

Then I set my Stockfish to compare with Mike1's version and got this for the original position:

click for larger view

49 4:24 +2.76
34.Qxe7 Bxe7 35.Rxf7+ Kh6 36.Rxe7 a6 37.bxa6 Qxa6 38.Rxc7 Qd6 39.Rc6 Qe5 40.f4 Qe2+ 41.Kh3 Kg7 42.Rc7+ Kf8 43.Bg2 Qa2 44.c5 Ke8 45.Rb7 Kd8

Alternatives were more or less =

Then I looked at:

click for larger view

The silicon beast came up with the sensible idea of eliminating a couple of pawns, starting with 35... Kh6

46 +2.76
35...Kh6 36.Rxe7 a6 37.bxa6 Qxa6 38.Rxc7 Qd6 39.Rc6 Qe5 40.f4 Qe2+ 41.Kh3 Kg7 42.Rc7+ Kf8 43.Bg2 Qa2 44.c5 Ke8 45.Rb7 Kd8 46.c6 Kc8 47.Re7 Qg8 48.Kh2 Qa2

45 +5.23
35...Kh8 36.Rxe7 Qd4 37.Rxc7 Qa1 38.Bf3 Qd4 39.Rc6 Kg7 40.c5 g5 41.hxg5 h4 42.b6 hxg3 43.fxg3 Qd2+ 44.Kh3 axb6 45.cxb6 Qe3 46.Kg4 Qd4+ 47.Kh5 Qe5 48.Rg6+ Kh7

However, it looked to me as if White could try to get the Q + g6 pawn for the two White pieces and that would be a cold win.

However, it proved awkward to orchestrate the dual attack:

click for larger view

58 ply +2.76
40.f4 Qe2+ 41.Kh3 Kg7 42.Rc7+ Kf8 43.Bg2 Qa2 44.c5 Ke8 45.c6 Kd8 46.Rd7+ Kc8 47.Rg7 Qb1 48.Kh2 Qc2 49.Re7 Kd8 50.Rh7 Kc8 51.Rh8+ Kc7 52.Rf8 Qd2 53.Rf7+

58 ply +2.76
40.Kh2 Qe2 41.Kg2 Qe5 42.f4 Qe2+ 43.Kh3 Kg7 44.Rc7+ Kf8 45.Bg2 Qa2 46.c5 Ke8 47.c6 Kd8 48.Rd7+ Kc8 49.Rg7 Qb1 50.Kh2 Qc2 51.Rg8+ Kc7 52.Rh8 Kd6 53.Rh7

58 ply +2.01
40.Re6 Qf5 41.Re8 Kg7 42.Re7+ Kh6 43.Rc7 Qe5 44.Rf7 Qb2 45.Rb7 Qe5 46.Bf3 Qc3 47.Rc7 Qa5 48.Rc8 Qf5 49.Rc6 Kg7 50.Rd6 Qc5 51.Rd7+ Kh8 52.Bd5 Qd4 53.Rd8+

This might not be very easy for White to win.



Premium Chessgames Member
  PawnSac: 34. Qxe7 Bxe7 35. Rxf7+ Kh8 36. Rxe7 Qa5 37. Re6 Kg7 38. Ra6 Qb4 39. Rxa7 Qc5 40. Ra6 Qd4 41. Rc6

Wow.. I actually got the whole line to the end. I thought i was missing something more dramatic, but what i had was adequate as the Q side pawns are very difficult if not impossible to protect, when the b passer wins.

Apr-25-19  TheaN: Bit of a weird puzzle candidate. Yes, White has <nothing to lose> after <34.Qxe7 Bxe7 35.Rxf7+ Kh6 36.Rxe7 ±> but this is not a winning combination.

Granted, it may be the only attempt, as the alternatives give White absolutely no prospects. Mainly 34.Qc6?! Qe5 ( ⩲ at best) 35.Re4?! Qd6=. The opposite Bishops have no decent targets after 36.Qxd6 Bxd6 37.Rxe7 Bxe7=.

Apr-25-19  boringplayer: Thanks < Ceri Evans > for the analysis. As many others saw, White is playing for one of two results. So, the "sac" isn't too hard to spot.
Apr-25-19  AlicesKnight: Like so many, I saw the possible sacrifice of Q for R and B but was not fully convinced. An interesting feature is the White B on both long diagonals - one direction pressuring the Black K-side, the other with a vital task of securing the White K from possible counterplay by the Black Q.
Apr-25-19  Ceri Evans: <boringplayer: Thanks < Ceri Evans > for the analysis.>

Thank you.

In my final position, I now believe that 40.f4 wins for White.



Premium Chessgames Member
  whiteshark: OK, the final position is indeed lost:

click for larger view

Black to move

1) +7.14 (34 ply) 41...Qa7 42.Be4 g5 43.hxg5 Kh8 44.Rh6+ Kg8 45.Rxh5 Qd4 46.Bd5+ Kg7 47.f4 Qd1 48.Rh6 Qg4 49.Bf3 Qd7 50.Rc6 Qe7 51.Kh3 Kf8 52.Bd5 Qe2 53.Rf6+ Kg7 54.Rh6 Qf1+ 55.Kh4 Qe2 56.Re6 Qh2+ 57.Kg4 Kf8 58.f5 Qa2 59.Kh5 Qd2 60.Rc6 Ke8 61.Rxc7 Qe2+ 62.Kg6 Kd8 63.Rh7 Qe8+ 64.Kf6 Qe2 65.Kg7 Kc7 66.Kg8+ Kd8

2) +53.07 (34 ply) 41...Qe5 42.Re6 Qb2 43.Re7+ Kf6 44.Rxc7 Ke5 45.Rc6 g5 46.hxg5 h4 47.gxh4 Qd4 48.Re6+ Kf5 49.Rf6+ Kg4 50.Rh6 Kf5 51.b6 Qg4+ 52.Kh2 Qd4 53.Rf6+ Kg4 54.b7 Qe5+ 55.Kg2 Kxh4 56.g6 Qg5+ 57.Kh2 Qe5+ 58.Kg1 Qg5+ 59.Bg2 Qc1+ 60.Kh2 Qb2 61.g7 Qe5+ 62.Kg1 Qe1+ 63.Bf1 Qe8 64.Rf3 Qg8 65.Rg3 Kh5 66.b8=Q Qxb8 67.g8=Q Qxg8 68.Rxg8 Kh6 69.Kg2 Kh7

3) +64.47 (34 ply) 41...Kf8 42.Rxc7 Qb2 43.Rc6 g5 44.hxg5 h4 45.gxh4 Ke7 46.Rf6 Kd8 47.b6 Qd4 48.Kg3 Qc3+ 49.f3 Qe1+ 50.Kg4 Qg1+ 51.Kh5 Qb1 52.b7 Ke7 53.Rf7+ Kd6 54.Rf8 Qh7+ 55.Kg4 Qd7+ 56.Kg3 Qxb7 57.Bxb7 Kc5 58.Bd5 Kd4 59.g6 Kd3 60.g7 Kc3 61.g8=Q Kc2 62.Kg2 Kc3

25.0 minute analysis by Stockfish 9 v010218

Premium Chessgames Member

click for larger view

Black to move

1) +4.47 (41 ply) 36...Qa5 37.Re6 Kg7 38.Rc6 Kh6 39.Bf3 Kh7 40.Be4 Kg7 41.Bxg6 Qd2 42.Bxh5 Qd7 43.Bf3 Qe7 44.Bd5 Kh8 45.Re6 Qf8 46.Re5 Kg7 47.Rg5+ Kh7 48.Be4+ Kh8 49.Rf5 Qd6 50.Rh5+ Kg7 51.Rd5 Qe7 52.Rg5+ Kf8 53.Bd5 Ke8 54.Rg6 Qh7 55.Rc6 Kd8 56.Ra6 Qf5 57.Re6 Kd7 58.Rc6 Qc2 59.Rh6 Qd2 60.Rh5 a5 61.bxa6

2) +4.47 (40 ply) 36...Qf6 37.Re6 Qg7 38.Ra6 Qd4 39.Rxg6 Kh7 40.Ra6 Qc5 41.Be4+ Kh8 42.Rc6 Qe5 43.Bd5 Qg7 44.Re6 Qf8 45.Ra6 Qc5 46.Rc6 Qe7 47.Rh6+ Kg7 48.Rxh5 Qb4 49.Re5 Qf8 50.Rg5+ Kh7 51.Be4+ Kh8 52.Rf5 Qd6 53.Rh5+ Kg7 transposing into line 1

15.0 minute analysis by Stockfish 9 v010218

This is really a poor evaluation of the resulting positions by SF...

Premium Chessgames Member
  agb2002: Black threatens Rxe8.

The black rook protects f7 and the black bishop blocks the white rook. This suggests 34.Qxe7 Bxe7 35.Rxf7+:

A) 35... Kh6 36.Rxe7 Qa5 (else drop another pawn) 37.Bg8 g5 38.Bd5 gxh4 39.gxh4 Qc3 40.Be4 Qh8 (40... Qxc3 41.Rh7#) 41.Rh7+ Qxh7 42.Bxh7 Kxh7 43.Kf3 with a won pawn ending.

B) 35... Kh8 36.Rxe7 Qa5 37.Re6 Kg7 (37... g5 38.Rh6+ Kg7 39.hxg5 looks winning for White [R+B+2P vs q]) 38.Ra6 followed by Rxa7 also seems to win for White.

C) 35... Kg8 36.Rxe7+ followed by 37.Rxc7 with the same conclusion.

Apr-25-19  Cheapo by the Dozen: I saw that after the initial Q for R+B+P exchange that, if Black played his king to h8, White would quickly win another pawn. I also saw that if Black instead played ... Kh6, then Bg8 could cause huge problems for him.

I think this counts as one of my relatively rare Thursday full solutions. :)

Premium Chessgames Member
  ChessHigherCat: So nobody (but yours truly) even considered the possibility of white's king penetrating the black castle? It's a fairly common theme. Look, if white establishes a fortress with 37. f7 Qb6 to protect the c-pawn 38. Kf3 and SF thinks black has to sac a pawn: 37. Rf7 Qb6 38. Kf3 a6 39. bxa6 Qxa6 40. Rxc7

leading to this position, where white has a clear advantage (too):

click for larger view

Penetrating the castle is probably too ambitious but at least the king is in play.

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