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Oliver Brendel vs Terence P D Chapman
27th World Senior Chess Championship 20 (2017), Acqui Terme, rd 4, Nov-10
English Opening: Agincourt Defense. Catalan Defense Accepted (A13)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
May-10-19  Walter Glattke: 21.Rh5 wins a pawn, e.g. 21.-Qd4 22.Qxd4 exd4 23.Nxf5+ Bxf5 24.Bxf5 Rh8. On the other hand, 21.Rxg6+ hxg6 22-Bxf5 g5 (22.-gxf5 23.Nxf5+ and NxQ) 23.Ng6 Rg8 24.Qb5 Nc6 25.e3 is not trustworthy.
May-10-19  goodevans: It took me about a minute to find <21.Rh5> and even then it didn't seem sufficiently "puzzle like" for me to be totally confident there was nothing better.

Black can hold onto the pawn (at least for a while) with <21...f4> but after <22.Nf5+ Bxf5 23.Bxf5 Rh8> (or 23...h6) <24.gxf4 exf4 25.Kh1> the open g-file gives white a clear advantage.

May-10-19
Premium Chessgames Member
  malt: Have 21.Rh5 f4 22.Nf5+ B:f5 23.B:f5 h6 24.gf4 ef4 25.Be4 (25.Kh1 Qd5+ 26.f3 Qd4)
followed by 26.Kh1
May-10-19
Premium Chessgames Member
  morfishine: A wonderful combination that has literally a combination of forks and pins, very pleasing
May-10-19  Walter Glattke: Better 23.-Rh8, after 23.-h6 one can play 24.d4 cxd4/exd4 25.Qc2 Rh8 26.Qc7+ Qxc7 27.Rxc7+ Kf8 28.Be6 fxg3 29.hxg3 Nb7 30.Rf5
May-10-19  1stboard: What happens if black plays 24 ... Qf8 instead of the text move ? Does it hold the posistion ? What does white play for move 25 ?
May-10-19  SpamIAm: <1stboard>, 24...Qf8 allows 25.Be6, winning the exchange. That should be enough for white to win, although it will take some time.
May-10-19  Diana Fernanda: Hello friends of chessgames.
May-10-19  TheaN: Not incredibly convinced by this one. 21.Rh5 is best but Black butchered it up quite hard after that. 21.Rxg6+?! is worth a check as well as Black's up by only very little so White has great compensation for the exchange.
May-10-19  Ariogermano: Welcome back ! Ariogermano !
May-10-19
Premium Chessgames Member
  agb2002: Black threatens Kxh6.

White has Nxg6, Rxg6+, Qd2 and Rh5.

21.Nxg6 hxg6 doesn't seem to achieve anything.

-----

21.Rxg6+ hxg6 22.Bxf5 g5 (22... gxf5 23.Nxf5+ and 24.Nxd6 wins) 23.Ng2 with the idea Ne3, Be4 and Nf5 is interesting but White probably won't have enough compensation in view of Black's Nc6, Nd4(e7) or Qd8, Nb7, Nd6.

-----

21.Qd2 f4 22.Rh5 Qc7 looks ugly.

-----

21.Rh5:

A) 21... Bxh5 22.Nxf5+ wins.

B) 21... Qd4 22.Nxf5+ Bxf5 23.Qxd4 exd4 24.Bxf5 wins a pawn.

C) 21... f4 22.gxf4 fxe4 23.Nf5+ Bxf5 24.Bxf5 and White looks better (Qd2 combined with Rh4, Kh1, Rg1, etc.).

-----

I'd probably play 21.Rh5.

May-10-19
Premium Chessgames Member
  whiteshark: Missed it completely. :(


click for larger view

Black to move

1) +0.72 (31 ply) <21...Qc7> 22.Nxf5+ Kh8 23.Rh6 Qf7 24.Qd2 Nc6 25.Rc4 Nd4 26.Nxd4 exd4 27.Rc1 Rbe8 28.a4 Re5 29.Bg4 Bh5 30.Bxh5 Rxh5 31.Rxh5 Qxh5 32.a5 Re8 33.Rc2 Qg5 34.Qxg5 fxg5 35.axb6 axb6 36.Rb2 Kg7 37.a4 g4 38.Rxb6 Rxe2 39.Rb5 Rd2

2) +0.84 (31 ply) 21...Kg8 22.Nxf5 Qc7 23.Rh6 Rbd8 24.Qb4 Nc6 25.Qg4 Ne7 26.Qf3 Nxf5 27.Bxf5 Bxf5 28.Qxf5 Qd7 29.Qh5 Qf7 30.Qg4+ Qg7 31.Rc4 Kh8 32.Rh5 Qxg4 33.Rxg4 Rd4 34.Rgh4 Rxh4 35.Rxh4 Kg7 36.Kg2 Kg6 37.Kf3 h5 38.a4 Rd8 39.Ke3

3) +0.96 (30 ply) 21...Qd8 22.Nxf5+ Kh8 23.Rh6 Nc6 24.a4 Nd4 25.Nxd4 exd4 26.Bg4 Kg7 27.Rh4 Qd5 28.a5 Rf7 29.Bf3 Qg5 30.Rf4 Qe5 31.Qb5 Rc7 32.a4 h5 33.Rh4 Bf7 34.Rb1 Qe8 35.Qxe8 Bxe8 36.axb6 axb6 37.Rb2 Ra7

6.0 minute analysis by Stockfish 9 v010218

May-10-19  Momentum Man: I didnít solve the puzzle, but I know why Black resigned. 27. Qxh7+ is crushing
May-10-19
Premium Chessgames Member
  PawnSac: yes MM it's mate in 3
May-10-19  Sniffles: Weird. Stockfish proceeds to lose the game for white: 27.Qxh7+ Kf7 28.Rxg7+ ???
May-10-19
Premium Chessgames Member
  Breunor: Not sure what you mean Sniffles. After 28 Rg7 + it's checkmate next move.
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