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Anna Kochukova vs Elizaveta Mokshanova
Russian Championship Higher League (Women) (2018), Yaroslavl RUS, rd 5, Jun-30
Sicilian Defense: Paulsen. Bastrikov Variation (B48)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Apr-26-20
Premium Chessgames Member
  al wazir: 27. Qg5+ Kxe4 28. Qf4+ Kd5 29. c4# works equally well.
Apr-26-20
Premium Chessgames Member
  An Englishman: Good Evening: Did not solve this one. Moves 18 and 19 are crucial because the attack doesn't work without White's 21st move gaining a key tempo by attacking the Black Queen.
Apr-26-20
Premium Chessgames Member
  halito27: The Sicilian is always a fight for initiative and 14...h6 followed by 15..Nh7 is just an incredibly passive way to play it. 14...e5 with the idea of 15 f5 b5 is more active.

16 Bd3 is an inaccuracy that gave Black one last chance to equalize with ...dxe5 17 fxe5 f5! - with the idea that capturing en passant allows Black to swap off queens. After 16...Rg8 it gets ugly quickly.

White does a great job converting the point. I play the Black side of this enough to appreciate a good whupping!

Apr-26-20  AlicesKnight: I saw the opening and the Ng5+ idea but missed the impotance of 19.Rxd6. Not enough help available for the Black K.
Apr-26-20  Brenin: Instead of capitulating with 23 ... Kh7, Black could have been bold (for a change) with 27 ... Kf5, setting the trap 28 Qg5+? Kxe4, when White's attack is running out of steam. Unfortunately for Black, White has much better lines, such as 28 Qh3+ Kxe4 29 g4 threatening mate with Qf3, or simply 28 Nc3 with multiple threats.
Apr-26-20  sfm: Brilliant!
16.-,Rg8?? was an unfortunate idea, taking a retreat-square from the king. White spots the winning 17.exd6!! and it is over.

On 18.Bxh7 Stockfish suggests -,Rgd8 to survive longer, but that is no life, white takes her bishop back.

The chance that a game between two russian women happens to be played by two "-ova"s is, in my very primitive estimate only about 1/16 (6%) - based on the below wiki-page over strong russian chess players having about 25% of the players having that ending. https://en.wikipedia.org/wiki/Categ...

What really surprised me was the chance for both players having a first name ending on "-a". Never thought about that.

Apr-26-20  devere: A brilliant combination, but not that hard to see. Better for Thursday/Friday than Sunday.
Apr-26-20  mel gibson: Stockfish 11 only played the first move:

18. Bxh7

(18. Bxh7 (♗d3xh7 ♖g8-d8
♗h7-d3 ♗d7-e8 ♘c3-e4 ♗d6-f8 ♕g3-f2 f7-f5 ♘e4-g3 ♖d8-d7 c2-c3 ♗e8-f7 ♘g3-e2 ♖c8-e8 ♗e3-b6 ♕c7-b8 g2-g3 ♗f7-h5 ♘e2-d4 ♘c6xd4 ♗b6xd4 ♕b8-c8 ♘f3-e5 ♗h5xd1 ♘e5xd7 ♗d1-h5 ♘d7xf8 ♖e8xf8 ♖f1-e1 ♗h5-g4 ♕f2-e3 ♖f8-e8 ♗d3-c2 ♕c8-d7 ♗c2-b3 ♕d7-b5) +6.14/33 83)

score for White +6.14 depth 33

Apr-26-20  Nosnibor: Got the answer within 60 seconds. Very nice conception.
Apr-26-20
Premium Chessgames Member
  Tiggler: I got the first move which is pretty obvious, but then after Kxh7, I played Qh4 (Qh3 might be better). White has a good attack, but I could not see how to finish it.
Apr-26-20
Premium Chessgames Member
  chrisowen: Party trick?
Apr-26-20  TheaN: Actually got the concept of this Sunday but executed it poorly (still winning though!) with <18.Bxh7 Kxh7> 19.Ng5+?! which is good (+3) but not as good (+5 with forced win). My idea was 19....hxg5 (else Kh8 Nxf7+; Kg6 Nxe6+ +-) 20.Qh3+ Kg6 with a strong attack, probably followed by 21.g4. True. 21.g4 +- because of f5, SF gives 21....Bxf4 22.Qh5+ Kf6 23.Ne4+ Ke7 24.Bc5+ Ke8 25.Nd6+!!:


click for larger view

And Black's choices are plenty but all terrible: 25....Kf8 26.Qxf7#, 25....Bxd6 26.Qxf7+ +-, 25....Kd8 26.Nxf7+ and 25....Qxd6 26.Bxd6 with a rather obvious win.

However, all of this ignores that <19.Rxd6 +-> is so much simpler. It follows the exact same ideas whilst taking out a crucial defender and counter attacking piece. As Nc3 can join the attack with tempo, this wins at least the bishop without any compensation for Black.

Apr-26-20
Premium Chessgames Member
  agb2002: The first idea that comes to mind is the maneuver 18.Bxh7 Kxh7 19.Rxd6 Qxd6 20.Ng5+ hxg5 (else loses the queen) 21.Ne4:

A) 21... Qd5 22.Nxg5+

A.1) 22... Kh8 23.Qh3(4)#.

A.2) 22... Kh6

A.2.a) 23.Qh4+ Kg6 24.Qh7+ Kf6 25.Ne4+ Ke7 26.Bc5+ Kd8 (26... Ke8 27.Qxg8#) 27.Qxg8+ Kc7 28.Qh7 f5 and White loses material.

A.2.b) 23.f5 exf5 (due to Qh4# and Nxe6+ and mate next) 24.Nxe6+

A.2.b.i) 24... Kh7 25.Qh4+ Kg6 26.Nf4#.

A.2.b.ii) 24... Kh5 25.Qg5#.

A.2.b.iii) 24... f4 25.Nxf4 with the double threat Nxd5 and Qh4+.

A.2.b.iv) 24... g5 25.Qh4+ Kg6 26.Qxg5+ Kh7 27.Qh5#.

A.3) 22... Kg6 23.f5+

A.3.a) 23... exf5 24.Ne4+ Kh7 25.Qh4+ Kg6 26.Qg5+ Kh7 27.Qh5#.

A.3.b) 23... Kf6 24.fxe6+ looks winning (24... Ke7 25.Rxf7+).

A.3.c) 23... Kh5(6,7) 24.Qh3#.

B) 21... Qe7 22.Nxg5+

B.1) 22... Kh6 23.Qh4+ Kg6 24.Qh7+ Kf6 25.Ne4#.

B.2) 22... Kg6 23.f5+ exf5 24.Nf3+ Kh7 (24... Kf6 25.Bg5+ wins) 25.Qh3+ Kg6 26.Nh4+ Kf6 (26... Kh7 27.Nxf5+ Kg6 28.Nxe7+ Nxe7 29.Qxd7 wins) 27.Rxf5+ Ke6 (27... exf5 28.Qxf5#) 28.Qf3 looks winning (28... Qxh4 29.Qd5+ Ke7 30.Rxf7+ Ke(d)8 31.Qxd7#.

C) 21... Qb8(c7) 22.Nxg5+

C.1) 22... Kg6 23.Nf3+ Kf5 (23... Kf6 24.Qg5#; 23... Kh7 24.Qh4+ Kg6 25.Qg5+ Kh7 26.Qh5#) 24.Nh4+ and mate next.

C.2) 22... Kh6 23.Qh4+ Kg6 24.Qh7+ Kf6 25.Ne4+ Ke7 26.Bc5+ Kd8 27.Qxg8+ wins decisive material.

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