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Ioan-Cristian Chirila vs Irine Kharisma Sukandar
Winter Classic (Group B) (2017), St Louis, MO USA, rd 1, Mar-11
English Opening: King's English. Two Knights' Variation Reversed Dragon (A22)  ·  1-0
ANALYSIS [x]

FEN COPIED

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find similar games 1 more I Chirila/I K Sukandar game
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Kibitzer's Corner
Sep-14-18
Premium Chessgames Member
  Phony Benoni: Looks like the puzzle should have been set for a move or two earlier.
Sep-14-18  Mayankk: The only way I could make sense of this puzzle was via the ‘Guess-the-move’ method. Basically I went to game page and tried to Guess the next move before playing it manually. I was mostly on track as the game plays itself out.

25 Rf2 makes sense since the knight can’t be taken owing to the Qxf7+ threat. 26 Nf6+ makes sense since exf6 results in Qg6+ threat and backed up by the Bishop at e5, it should be curtains for Black. 27 Qg7 is obvious owing to the mate threat on g7. 28 Ne4 is also a practical move since it protects our Queen from exchange and carries the threat of Rxf8+ followed by Qxg7 mate. 29 Kg2 is again a practical move since it unions our Rook and renews the threat of Rxf8+. And 30 Nf6+ is too obvious to miss.

So all-in-all a clutch of practical moves leading to a win for White.

Sep-14-18
Premium Chessgames Member
  al wazir: <Phony Benoni: Looks like the puzzle should have been set for a move or two earlier.> I think it was hard enough this way. I couldn't decide whether to interpose the ♘ or the ♖ on f2. Finally I tossed a coin and it came up N.

Wrong move.

Sep-14-18
Premium Chessgames Member
  wtpy: This was too hard for an insomnia puzzle. Figured 25 Rf2 fe6 26Nf6 Kh8 27 Qg6 Qd3 but looked for something more forcing than Ne4 because I didn't count the pieces and thought white was piece down after the capture on e6. Otherwise Ne4 would be a natural reset with the quiet Kg2 breaking the pin. Note to self--wait until morning.
Sep-14-18
Premium Chessgames Member
  boringplayer: Looks like 21....h6, allowing 22.Bh3, was the ruination of the Black position. 21...g6 ( according to Stockfish ) was much better.
Sep-14-18  zb2cr: Instead of 30. Nf6+, I went with 30. Rxf8+, Kxf8 ( 30. ... Rxf8; 31. Qxg7#); 31. Qxg7+, Ke8; 32. Nd6+, Kd8; 33. Bf6# and was quite proud of myself.

Until I was deflated by seeing the actual game line of 30. Nf6+, which leads to mate much earlier.

Sep-14-18  Walter Glattke: Hopeless also 25.-Qxe4 26.Rxf7 g6 27.Rg7++ Kh8 28.Qxh6#
Sep-14-18  mel gibson: That is complicated - I thought
that it was either the Knight or Rook
to block the check.
It turns out that it's the Rook.

Stockfish 9 says mate in 18:

25. Rf2

(25. Rf2
{(Rf6-f2 f7xe6 Ne4-f6+ Kg8-h8 Qh5-g6 Qe3-d3 Nf6-e4 Qd3-e3 Ra1-f1 Nb6-d7 Kg1-h1 Qe3xe4+ Qg6xe4 Kh8-g8 Be5xg7 Bf8xg7 Rf2-f7 Rb3-b1 Qe4xb1 Nd7-e5 Rf7xg7+ Kg8xg7 Qb1xb7+ Kg7-g6 Qb7-e4+ Kg6-g7 Qe4xe5+ Kg7-g8 Qe5xe6+ Kg8-h8 Rf1-f7 c5-c4 Qe6xh6+ Kh8-g8 Qh6-g7+) +M18/49 )

Sep-14-18
Premium Chessgames Member
  malt: Gone for 25.Nf2 fe6
(25...gf6 26.Q:f7+ Kh8 27.B:f6+ )

26.Qf7+ Kh8
(26...Kh7 27.Bf4 (Δ 28.R:h6#)

27.R:e6 Qg5 28.Ng4

(Δ 29.R:h6# )

Sep-14-18  WorstPlayerEver: 25. Nf2 fxe6 26. Qf7+ Kh8 27. Rxe6 Qg5 28. Ng4 I thought that was pretty ingenious


click for larger view

But 27... Nc4 I did not notice.
28. Bxg7+ Bxg7 29. Rxe3 Nxe3


click for larger view

28. Bxg7+ Bxg7 29. Rxe3 Nxe3 30. Re1 Rxa3 31. Nh3 Rf8 32. Qh5 Nc2 33. Rc1 Nd4 34. Nf4 Rd8 35. Kh1 Nf3 36. Ng6+ and winning


click for larger view

Sep-14-18  WorstPlayerEver: PS sorry, I doubled a line.
Sep-14-18
Premium Chessgames Member
  Jimfromprovidence: Great puzzle.

I noticed that 25 Rf2 is better than 25 Nf2 because it keeps the duel threats 26 Qxf7+ and 26 Nf6+ alive.

It was also fun to discover as <Mayankk> earlier pointed out that the interference move 28 Ne4 below, also opens up the threat 29 Rxf8+ with mate the next move.


click for larger view

Finally I noticed that 29 Kh1 also gets the job done for white.


click for larger view

Sep-14-18  WorstPlayerEver: 25. Rf2 Qxe4 26. Qxf7+ Kh7 27. Qg8+ Kg6 28. Bf7+ Kg5 29. Bf6+ quite an unusual check


click for larger view

29... Kg4 30. Be6+ Qxe6 31. Qxe6+ Kh5 32. Qf7+ g6 33. g4+ Kxg4 34. Qxg6+ Kh3 35. Qh5#

Sep-14-18
Premium Chessgames Member
  agb2002: White has a bishop for three pawns.

The black queen checks the king and threatens Qxe4, fxe6 and gxf6.

White has 25.Rf2:

A) 25... Qxe4 26.Qxf7+ Kh7 (26... Kh8 27.Qg8#) 27.Bf5+ wins decisive material.

B) 25... fxe6 26.Nf6+ (26.Qg6 Nd7)

B.1) 26... gxf6 27.Qg6+ Bg7 (27... Kh8 28.Bxf6+ Bg7 29.Qxg7#) 28.Bxf6 Qg5 (28... Kf8 29.Qxg7+ Ke8 30.Qe7#) 29.Bxg5 hxg5 30.Rf7 and mate in two.

B.2) 26... Kh8 27.Qf7

B.2.a) 27... Bd6 28.Bxd6 gxf6 29.Qxf6+ Kg8 (29... Kh7 30.Be5 and mate soon) 30.Be5 wins (30... Qg5 31.Qh8#).

B.2.b) 27... Be7 28.Nd5 Qg5 (28... e(N)xd5 29.Qxg7#) 29.Nxe7 Qxe5 30.Ng6+ Kh7 31.Nxe5 wins the queen.

Sep-14-18
Premium Chessgames Member
  agb2002: 28.Nd5 in my line B.2.b loses miserably after the obvious 28... Qxe5.

However, instead 28.Ng4 Qg5 29.Qxe6 keeps the attack alive.

Sep-14-18  Captain Hindsight: Better would have been < 21. ..g6! 22. Qe2 Nd7 23. Bb2 f5 24. Nf2 Qb6 -+ >


click for larger view

Sep-15-18
Premium Chessgames Member
  patzer2: My attempt at yesterday's Friday puzzle was 25. Nf2, which gives White an advantage after 25. Nf2 fxe6 26. Qf7+ Kh8 27. Qxe6 ± to +- (+1.81 @ 38 ply, Stockfish 9). However, 25. Nf2 isn't near as strong as the game move 25. Rf2! +- (+20.72 @ 35 ply, Stockfish 9).

P.S.: Black's decisive mistake was apparently 22...Qd5?, allowing 23. Rf6! +- (+2.71 @ 33 ply, Stockfish 9).

Instead, 22...Qe8 = (0.00 @ 33 ply, Stockfish 9) appears to hold it level.

Earlier, Black missed a chance for a near winning advantage with 21...g6 ∓ to -+ (-2.30 @ 30 ply, Stockfish 9).

Sep-15-18
Premium Chessgames Member
  perfidious: <boringplayer: Looks like 21....h6, allowing 22.Bh3, was the ruination of the Black position. 21...g6 ( according to Stockfish ) was much better.>

Old friend, ...g6 is about the last move one would apparently wish to play, laying the long diagonal wide open, but the tempo gain pointed out in the last two posts, which also covers the sensitive f6 square, does the job.

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