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Alexei Fedorov vs Rustam Kasimdzhanov
RUS-Cup2 (1996), Moscow, rd 8, Nov-28
Sicilian Defense: Fischer-Sozin Attack. Main Line (B89)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Oct-27-04  clocked: 15...0-0 16.Nxe6

24...Nxb2? necessary was 24...Nxe3

Oct-27-04  RisingChamp: I think the finish was rather neat.Fedorov seems to be a good tactician-Of course-u cant play Kings Gambit unless you are.
Nov-28-20  morfishine: Really interesting series of moves, my main problem was move order
Nov-28-20
Premium Chessgames Member
  Gregor Samsa Mendel: What I didn't see was that after 26 Nxd6 the white queen covers the c2 square and protects against black's mate threat.
Nov-28-20  Honey Blend: I went for 28. ♕xa6+ ♗b7 29. ♕e6+ ♔b8 before 30. ♔xb2 exf4. 31. ♗d4 is now a strong move, threatening ♗e5.


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Nov-28-20  stacase: Got the first three moves (-:

I would have snatched the pawn, 28.Qxa6+

Nov-28-20
Premium Chessgames Member
  al wazir: I found the key move 25. Rxd6+, but I think I would have played 25. Rc3: 25...Bxe4 26. Rxc7 Bxg6 27. Rxc8+ Kxc8 28. Kxb2 exf4 29. Bd2. White is slightly better because of the connected passed K-side ♙s.

If instead 25...Qxc3, then 26. Nxc3 Rxc3 27. Kxb2 Rc7 28. fxe5 dxe5 29. Nxe5, with ♕+♙+♙ vs. ♖.

Nov-28-20
Premium Chessgames Member
  devere: An interesting sideline is 27...Nc4 28. Bb6 Nxb6 29. Nxb6 Rxf4 30. Rd1+! Rd4 31. Qg8+ Ke7 32. Qg7+ Kd6 33. Qf8+ Kc6 34. Rxd4 exd4 35. Na8 and White wins a piece.
Nov-28-20
Premium Chessgames Member
  Breunor: Al Wazir, after 25 Rc3 black has Nd3 ch which gives black a slight advantage after 26 Kd2.

If white instead plays 26 cxd3 it loses to Bxe4; If then 27 Rxc7 Rxc7ch followed by 28 K moves Bxg6.

Nov-28-20  Walter Glattke: Here are my actual analyses from the first page without looking the match page: A) 25.Kxb2 Qxc2#
B) 25.Rc3 Bxe5 26.Qxe5 Qxc3 27.Bb6+ Rc7
28.Qa8+ Kd7 29.Nxe5+Ke6? 30.Nd3+ Kf7
31.Qd5+ Kg7 32.Bd4+ Qxd4 33.Qxd4+ Kg8
34.Nxb2 decisive material
B2) 29.Nxe5+ dxe5 30.Qd5+ Ke8 31.Bxc7
Qe1+ 32.Kxb2 one rook for 2 pawns for
black
B3) 25.Rc3 Bxe5 26.Rxc Bxg6 27.Rxc8+ Kxc8
28.Kxb2 exf4 looks draw
B3) 25.Rc3 Nd3+ 26.cxd3 Bxe5 27.Rxc7 Bxg6
28.Rxc8+ Kxc8 29.Kd2 similar to B2)
C) 25.Rxd6+ Bxd6 26.Qxd6+ Qxd6 27.Nxd6
Nd3+ 28.Kd2 Nxe1 29.Nxb7+ Kc7 30.Nxe1
Nxe1 31.Kxb7 decisive material for black
Now looking at the website with the solution:

C2) 25.Rxd6+ Bxd6 26.Nxd6 Qxb2+!? 27.Qxb2
Rxb2+ 28.Kxc2 Bxf3 29.Kxb2 exf4 1 piece
for white
C3) the crux 26.-Nd3+? 27.Qxd3
C4) 26.-Bxf3 27.Nxc8 Kxc8 28.Kxb2 exf4
29.Bb6! Qd7 30.Bc5 Rd8 31.Qxa6+ Qb7
32.Qxb7 Kxb7 won ending, 2 pawns for
white.

Nov-28-20
Premium Chessgames Member
  Breunor: Walter on your B3 after 27 Rxc7 black plays Rxc7 ch not Bxg6. Then he takes the queen on move 28. This line loses for white.
Nov-28-20
Premium Chessgames Member
  Messiah: #2difficult4me

25.Nc5 did not work. :'(

Nov-28-20  Brenin: This was rather easy for a Saturday. Black's 24 ... Nxb2, threatening Qxc2 mate and Nxd3+, more or less forces the R sac 25 Rxd6+, whereas 24 ... Nxe3 25 Rc3 Nc4, or 25 c3 Bxe4 26 Qxe4 Ng2, would have given Black the advantage. After a fairly obvious exchange of pieces following 25 Rxd6+, White has a continuing attack and a 2P endgame advantage to look forward to.
Nov-28-20  Walter Glattke: Breunor, I apologize for the little typing mistakes, I always be not perfect, but I think for 27.-Rxc7 28.Qxe5 I don't know, what in B3) or the B4) with 25.-Nd3+ is wrong, optical Be5 and Rc7 attack c2, but it is the same crux here, that Qg6 guards d3 and c2.
Nov-28-20  Walter Glattke: Systematic test are really senseless, my "variation check system" says, 40 possible moves, 32 with III lost 25.-Qxc2# 1 correct move 30 25.Rxd6+ , II disadvantage e.g. move 03 (25.c3) III, move 19, 25.Kb1 with 25.-Qxc2+ 26.Ka1 Nxd3, move 35 III with 25.Re2 Nxd3+ 26.Kb1 Qxc2 27.Ka1 Qb2# or Kd1/Kd2 Qxc2# move 38 III with 25.-Nxd3 26.exd3 dxc5 - system not good for this position, more for Marshall Gambit in move 16.
Nov-28-20  Walter Glattke: Move 38 is 25.Bc5
Nov-28-20  malt: Went for 25.R:d6+ ( did not like the look of 25.Rc3 Nd3+ 26.Kd2 B:e4 )

25...B:d6 26.N:d6 B:f3 27.N:c8 K:c8 28.K:b2

Nov-28-20  Walter Glattke: B4) 25.Rc3? Nd3+ 26.cxd3 Bxe5 27.Rxc7 oh, I see 27.-Rxc7 is with check then, my mistake. Breunor means ch is check, I overlooked that.
Nov-28-20  malt: Thought 24...N:e3, better than 24...N:b2

25.Rc3 Nc4 26.b3 Qa5 Δ ...♗:e4 and ♕:c3

Nov-28-20
Premium Chessgames Member
  agb2002: White has a bishop, a knight and a pawn for the bishop pair.

Black threatens Qxc2# and Nxd3+.

White has Rd2 and Rxd6+.

In the case of 25.Rd2 Nd3+ 26.Kb(d)1 Bxe4 27.Qxe4 Nxe1 Black wins an exchange.

In the case of 25.Rxd6+ Bxd6 26.Nxd6 (the queen now protects c2; 26.Qxd6+ Qxd6 27.Nxd6 Nd3+ 28.Kd1 Nxe1 29.Nxb7+ Kc7 and Black wins two exchanges):

A) 26... Nd3+ 27.Qxd3 Bxf3 28.Nxb5+ (28.Bb6 Qxb6 29.Nc4+ Qd4) 28... Qd7 29.Bb6+ Ke7 30.Rxe5+ wins decisive material (30... Kf7 31.Qh7#).

B) 26... Bxf3 27.Nxe8 (threatens Bb6) 27... Kxc8 28.Kxb2 ends up two pawns ahead at least (28... exf4 29.Qxa6+).

C) 26... e4 27.Nxb7+ Qxb7 28.Bb6+ Ke7 (28... Kd7 29.Ne5+ Ke7 30.Qg7+ Ke8 31.Qxb7 wins) 29.Rxe4+ with a winning attack.

Nov-28-20
Premium Chessgames Member
  drollere: got the first several moves, starting with the R sacrifice. although, to be honest, this was a position that highlighted, underlined and drew a circle around the d6 pawn.
Nov-29-20  RandomVisitor: 22.exf5 was better but 22...Rxf5 (22...Bd8 23.f6) is complicated.

Better for white might be 19.Bd2:


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Stockfish_20112608_x64_modern:
NNUE evaluation using nn-c3ca321c51c9.nnue enabled

<63/85 6:59:06 +2.06 19.Bd2 Nxd2 20.Rxd2> Qb6 21.Nb3 b4 22.axb4 Qxb4 23.Kb1 Kd7 24.Nxa5 Qxa5 25.Bf1 Rxc3 26.Qxc3 Qxc3 27.bxc3 Bc6 28.e5 Kc7 29.exd6+ Bxd6

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