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Evgeny Tomashevsky vs Boris Avrukh
European Team Championship (2009), Novi Sad SRB, rd 5, Oct-26
English Opening: King's English Variation. Kramnik-Shirov Counter (A21)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Aug-09-12  fisayo123: fantastic struggle!
May-02-19
Premium Chessgames Member
  agb2002: White has a bishop for a knight.

The main support of Black's position seems to be the pawn on d6. This suggests 34.Rxc5:

A) 34... Rxc5 35.Bxd6 Rxd6 (35... Qd7 36.Qxc5 wins a piece; 35... Rxc4 36.Bxd7 wins) 36.Qxc5 wins a pawn.

B) 34... dxc5 35.Rxf6+ Kxf6 (35... Qxf6 36.Bxc7 wins a piece) 36.d6

B.1) 36... Qd7 37.Qa1+ (37.dxc7 Qd1#) followed by 38.dxc7 wins a piece.

B.2) 36... Rd7 37.Qa1+, as above, wins.

May-02-19  Walter Glattke: I had 35.-Rxd6 36.Qxc5 Rxb6 37.Qxb6 with won ending. (37.-Qa3!? 38.Qxb7+ and g3) 37.-h4 38.d6 Qd7 39.Qc7 Ke8 40.Qb8+ Kf7 41.c6 - not easy then. But he payed 35.-Rxc4 36.Bxe7 (Q guards c1!) Rxb6 37.h4 possble was now 37.-Rb1+ 38.Kh2 gxh4 39.d5 Rcc1 40.Bxh4 b5 41.Qe7+ Kg8 42.Bf6 Rh1+ 43.Kg3 h4+ 44.Kxg4, and white wins.
May-02-19  Cheapo by the Dozen: I didn't notice why 34 ... dxc5 would have been so horrible. So I didn't get more out of this than a big simplification giving White a nice passed pawn. Oh well.
May-02-19  1stboard: Why doesn't blank play 35 Rxd6 ?

White then 36 Qxc5

Black then 36 Rxb6

White then 37 Qxb6

Black still a pawn down , but has a fighting chance.

Can someone run this through a chess engine ....

May-02-19
Premium Chessgames Member
  malt: Had 34.R:c5 R:c5
(34...dc5 35.R:f6+ Q:f6 36.B:c7 )

35.B:d6 R:d6 36.Q:c5 R:b6 37.Q:b6

May-02-19  rudiment: If it were Black's move, White's Bishop would be doomed. Trying to save the Bishop with something like h3 hands Black the initiative. But the pawn on d6, which the Bishop is attacking, is quite weak. I tried to make something out of pinning a rook there with:

34. Rxd6 Rxd6 35. Rxc5 Rxc5 36. Qxc5 b6 37. Bxd6 bxc5 38. Bxe7 Kxe7

... which looks winning for White but I'm sure I've overlooked some of Black's better responses.

May-02-19  saturn2: I saw white wins the d pawn by

34. Rxc5 Rxc5 35. Bxd6 Rxd6 36. Qxc5 Rd7

which is a modest harvest.

May-02-19
Premium Chessgames Member
  malt: <1stboard: Why doesn't blank play 35 Rxd6 ? >

35...R:c4 36.R:f6+ Q:f6

Missed 35...K:f6 36.d6 in <agb's> Line B

May-02-19  Walter Glattke: C) 34.-dxc5
C1) 35.Bxc7 Qxc7
C2) 35.Rxf6+ Kxf6 36.Qb2+ Kg6
C3) 35.d6 Qd7 (dxc7 Qd1#)
So I am not sure that White can force to win a pawn.
May-02-19  Walter Glattke: Oh, I see B) that Qa1+ really wins.
May-02-19  saturn2: <rudiment 34. Rxd6 Rxd6 35. Rxc5> Black can try
35...Ra6
May-02-19  VincitQuiSeVincit: Where's the win after 39 ... g4
May-02-19  TheaN: Oh wow. I had 34.Rxd6 with similar ideas, but this switch leads to a Black brilliancy:

<34.Rxd6? Rxd6 35.Rxc5> else White's lost <35....Rb6! -+> and down and out.

May-02-19  TheaN: <VincitQuiSeVincit: Where's the win after 39 ... g4>

39....g4 40.Qd6 Rcc1 (otherwise I'd say g4 has no real point) 41.Qf6+ Kg8 (Ke8 42.Qf8+ Kd7 43.Qd8#) 42.Qf8+ Kh7 43.Qf7+ Kh6 (Kh8 44.Bf6#) 44.Bg5#.

Tl;dr, White's faster.

May-02-19  Momentum Man: This was a tough puzzle for me. I got the first move from intuition but couldn’t see a good follow up move
May-02-19
Premium Chessgames Member
  dorsnikov: I'm with MOMENTUM MAN.
May-02-19
Premium Chessgames Member
  Jimfromprovidence: <1stboard> <Why doesn't blank play 35 Rxd6 ?

White then 36 Qxc5

Black then 36 Rxb6

White then 37 Qxb6

Black still a pawn down , but has a fighting chance.


click for larger view

Can someone run this through a chess engine ....>

I ran it through Chessgames' Stockfish engine for 6 minutes. Here are the first few moves.

1) +2.82 (29 ply) 37...h4 38.Kf1 Qa3 39.Qe6+ Kg7 40.Qe5+ Kh6 41.Qxe4 Qc1+ 42.Ke2 b5 43.Qe6+ Kh7.

Obviously there are other variations to consider like 37...h4 d6, or to go for a bank rank mate with 37...Qa3, 37...Qe5, etc.

May-02-19  VincitQuiSeVincit: I meant to say "Where's the win after 38 ... g4" not "after 39..g4" (sorry for typo)
May-02-19  Ceri Evans: Hi, all.

Here's my Stockfish analysis, after the query.

I ran the position forward to:


click for larger view

42 46:58 +14.95 38.g3 Qd7 39. Qd4 Ke7 40. Qxe4+

41 46:58 +9.93 38.d6 Qe5 39.Qd4 Qa5 40.Kf1 g3 41.hxg3 Qb4 42.Qxe4 Qxd6 43.Qxb7+ Kf6 44.Qd5 Qa3 45.gxh4 Qc1+ 46.Ke2 gxh4 47.Qd4+ Ke6 48.Qxh4 Kd7 49.Qd4+ Kc8 50.Qc5+ Kb8 51.Qb5+

41 46:58 +6.70 38.Kf1 Qa3 39.Qe6+ Kg7 40.Qe5+ Kh6 41.Qxe4 Kg7 42.Qd4+ Kf7 43.Ke2 Qa4 44.Kd3 Qd1+ 45.Kc3 Qe1+ 46.Kb3 Qb1+ 47.Ka4 Ke7 48.c5 Kd8 49.d6 Qa2+ 50.Kb4 Qb1+ 51.Ka5

41 46:58 +6.54 38.c5 Qe5 39.Qxb7+ Kg6 40.Qa6+ Kf7 41.h3 g3 42.Qc4 Qb2 43.Qf1 Ke7 44.fxg3 hxg3 45.Qe1 Qe5 46.c6 Qb8 47.Kh1 Qe5 48.Qa5 Ke8 49.Kg1 Qf6 50.Qe1 Qe5 51.Qc1

best move: g2-g3 time: 46:58.218 min n/s: 22.841.117 nodes: 64.371.247.893

Cheers,

Ceri

May-02-19  Walter Glattke: Stockfish is right, I thought, that 38.g3 allows 38.-h3, but 39.c5 is Zugzwang, 39.-Kg7 40.Kf1 Qf7 41.Ke1 Qf3 42.Qxb7+ Kh6 43.d6 Qh1+ 44.Kd2 Qf1 45.Qxe4 Qxf2+ 45.Kd3 Qxh2 46.d7 Qg2 47.d8Q Qxe4+ 48.Kxe4 h2 49.Qd1 more than +9
May-02-19  saturn2: <VincitQuiSeVincit after 38 ... g4>

I would play 39. Qa2 Rc1+ 40. Kf2 Rbb1 41. d6+
Since the white king can escape he should win. It is not a computer line.

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