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Petr Kiriakov vs Alon Greenfeld
Henry Chilufya Mem (2017), Mansa ZAM, rd 6, Oct-22
English Opening: English Defense. General (A10)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Apr-19-21  Walter Glattke: A) 24.-Be4+ 25.Nxe4 Qb2#
B) 24.-Be4+ 25.Bd3 Bxd3+ 26.Qxd3 Qxd3+ 27.Kc1 Qc3+ 28.Kb1 Rxd2 29.Rxd2 Qxd2 30.e.g. a4 Rxe7 31. ... Re1#
Apr-19-21
Premium Chessgames Member
  drollere: once you see the N on d2 cannot both protect e4 and block b2, Be4+ is obvious.
Apr-19-21  saturn2: White did not go for the complications after
4.Bd3 f5 5. exf5 Bxg2
But he should have.
Apr-19-21
Premium Chessgames Member
  opus: All the King's men...

25. Qd3 Bxd3+ 26. Bxd3 Rxe7 27. Bc2 Rxd2 28. Rf1+ Kg8 29. Rc1 Re1 30. g4 Rxc2 31. Rxe1 Qb2#

Apr-19-21
Premium Chessgames Member
  agb2002: Black has a rook for a knight and a pawn.

The white knight prevents Qb2#. Therefore, 24... Be4+:

A) 25.Nxe4 Qb2#.

B) 25.Bd3 Bxd3+ 26.Qxd3 Qxd3+ wins decisive material.

Apr-19-21  Brenin: This is easy, even for a Monday. Starting the puzzle a move earlier, with 23 ... Qc3+, would have made it slightly more of a challenge.
Apr-19-21  TheaN: Straightforward bishop sacrifice with <24....Be4+ 25.Bd3 (Nxe4 Qb2#) Bxd3+ 26.Qxd3 Qxd3+ 27.Kc1 (Kb2 Rxd2+ -+) Qc3+ -+> and Black will also win Nd2, giving White absolutely no counterplay. Apparently it's #8 from Be4+ onward which kind of makes sense.
Apr-19-21  mel gibson: Good beginners puzzle.
Apr-19-21  TheaN: <saturn2: White did not go for the complications after 4.Bd3 f5 5. exf5 Bxg2 But he should have.>

This is a rather complicated line in the Owen that, understandably, White doesn't want to go into if he's not familiar with it. However, it does lead to a good opening for Black in that case.

For those that don't know, this is the key 1.e4 b6 2.d4 Bb7 3.Bd3 f5. In this variation, White has to be careful, but is winning; 4.exf5! Bxg2 5.Qh5+ g6 6.fxg6 Bg7 (else g7+) 7.gxh7+ Kf8, White has a good game after 8.hxg8Q+ Kxg8 9.Qg4, but even better is 8.Nf3! Bxh1 9.Ng5 +-, where the whole Black camp is paralyzed even a rook up (it's Rh8 which is immobile).

The inclusion of 4.c4 e6 (not exactly like in the game but for convenience) gives Black a few more options, primarily 5.exf5 Bb4+, after which Kf1! is required, but also opens up the diagonal to the queen, given 5....Bxg2 6.Qh5+ g6 7.fxg6 Bg7 8.gxh7+ Kf8 9.Ne2! Bxh1 10.Bg5 Nf6:


click for larger view

Again, White's a rook down but Black doesn't have a lot of play. Very double edged position that can go either way.

Apr-19-21  TheaN: Don't want to delete my post, but obviously forgot 11.Qh4 in the last line. Worth to analyze.
Apr-19-21  lost in space: 24...Be4+ 25.Nxe4 Qb2#
Apr-19-21  Cheapo by the Dozen: Divert the knight.
Apr-19-21  awfulhangover: Good Monday puzzle.
Apr-19-21  malt: 24...Be4+ 25.Bd3

(25.N:e4 Qb2# )

25...B:d3+ 26.Q:d3 Q:d3+ 27.Kb2 R:d2+ wins

Apr-19-21  Walter Glattke: Glattke Code U 23 is not yet worked out (1.e4 b6 = U 20 - 23) but building up "constellation U" with 0-0-0 Rg1 Rh1 Qd2 Bd3 Be3 Nc3 Ne2 f3 allows g4 and h4 against black 0-0, but here, so far, 4.Bd3 f5, maybe 5.f3 is still white advantage, and, playing Encyclopaedia code, you will have tabies in mass, be careful with the moves offered there.
Apr-19-21  Walter Glattke: Other beginning moves here, maybe 4.f3 +-
Apr-19-21  Caissas Clown: Easy. Now for the hard bit : why does a GM play on to mate rather than resign in a classical format game ? Surely he was not in TT as early as move 25 ? Maybe Ne4 "looked" like check ? Or with both Q and R en prise, he did not see the mate ??
Apr-19-21  zb2cr: 24. ... Be4+ does the trick.
Apr-19-21  QueenMe: <Caisas Clown>: Exactly what I wondered: Once white realizes there is no other piece that can respond to the check except the knight - which is the only thing holding back a very basic Queen & Rook mate - why did he not resign?
Apr-19-21  saturn2: Thx <Thea> for the analysis. In blitz I am sometimes confronted with lines like 1. d4 e6 2.c4 b6 and my impression is if white tries to avoid complications he will be worse after few moves like it happened in the game.
Apr-19-21
Premium Chessgames Member
  chrisowen: Ruffle a feather Be4+ ghosts AOH jastha aeschylus oh it dear ruffle a feather fork it zap beginning awol quota hollow tallow hamster ivory ebony vis ducky its likes pogos pot dug cud it wham it jumpy ivory totadd either v iffy’s dub goofball cos it was dole que Be4+ bag?
Apr-19-21  saturn2: After 1.d4 e6 2c4 e6 3. e4 Bb7 4.Bd3 f5

<Walter Glattke maybe 5.f3 is still white advantage> is it not already black's advantage after 5...fxe4 6.fxe4 Qh4+

Apr-19-21  King.Arthur.Brazil: <Saturn2><Walter Glattke>You can even capture directly (e4) as: 1. e4 b6 2. d4 ♗b7 3. ♗d3 e6 4. c4 f5 5. f3 fxe4 6. fxe4 ♗xe4 7. ♗xe4 ♕h4+ 8. ♔f1 ♕xe4.

<TheaN> I guess the first line 1.e4 b6 2.d4 ♗b7 3.♗d3 f5 4.exf5! ♗xg2 5.♕h5+ g6 6.fxg6 ♗g7 7.gxh7+ ♔f8 is more dangerous for Black. For example, if it follows: 8. ♘f3 ♗xh1 9. ♘g5 ♘h6 the King gives the line: 10. ♘e6+ dxe6 11. ♗xh6 ♕e8?? 12. ♗g6 ♕d7 13. ♕e5! ♖xh7 14. ♗xh7 ♗xh6 15. ♕h8+ ♔f7 16. ♕g8+ ♔f6 17. ♕g6#. Obviously, if Black remained with his ♕ on the 8th rank (12...♕d8 or 12...♕c8), he will lose it after 15.♕h8+. The Black good defense seems to be 11...♕xd4! that avoid all threats. A possible sequence would be: 12. ♘c3 ♕f6 13. ♗xg7+ ♕xg7 14. O-O-O. There is no guarantee that White will recover the material or has a winning attack, although have good chances. For players with Marshall or Tal style.

Apr-19-21  AlicesKnight: The only alternative to the gameline was loss of the white Q after interposal of white B and its capture, and this only delays things.
Apr-19-21
Premium Chessgames Member
  chrisowen: Lots of fun,

1.e4 b6 2.c4 Bb7 3.Nc3 e6 4.d4 Bb4 5.Bd3 f5 6.Qe2 Nf6 7.Bg5 O-O 8.f3 h6 9.Bh4

goodnight no?

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