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Nick de Firmian vs Robert Huebner
32nd Rubinstein Memorial (1995), Polanica Zdroj POL, rd 7, Aug-??
French Defense: Steinitz. Boleslavsky Variation (C11)  ·  1-0



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sac: 18.Nf6+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  Phony Benoni: Start with <20.Rg3+>. Rook can't be taken since 21.Qg5+ will be mate next move, so <20...Kh8 21.Qh6 Bxf6> and now we wrap it up in style: <22.Qg7+ Bxg7 23.Bxg7+ Kh8 24.Bf6#>.

Oh, black played 21...Rg8+ instead. Well, not like it was a problem.

Premium Chessgames Member
  ChessHigherCat: 20. Rg3+ Kh8 (Bxg3 Qg5+ and bye-bye blackbird) 21.Qh6 Bxf6 22. Bxd7 Bxd4 23. Rh3

Time to see what I missed...

Aug-16-17  nalinw: Tricky little puzzle - though it is Wednesday after all. Got the first two moves - but didn't see the ... Rg8 defense.
Premium Chessgames Member
  ChessHigherCat: I saw the possibility 21...Rg8 but I thought, well in that case, 22. Qxh4 wins a piece and protects the bishop on d4, so it's not worth analyzing further. 22. Rg7 was much better though.
Aug-16-17  WorstPlayerEver: 21... Bf6 22. Rg7
Aug-16-17  stst: Interesting & delicate.
20.Rg3+ Kh8
(if 20.....BxR, 21.Qg5+ Kh8, 22.Qg7#)
21.Qh6 Rg8
(if 22......NxP, 22.Qg7#)
22.Rg7 (A)NxP or (B) BxP
(if 22.....RxR, 23. QxR#)
(A)....NxP, 23.Rxh7#
(B)BxP, 23. either R or Qxh7#
Aug-16-17  stst: 22.Nf8 escapes my view, but same result, dead faster, for 23.RxR+ KxR
24.Qg7# essentially same deal - K is smothered.
Aug-16-17  whiteshark: Something has remained indelibly etched in my pattern recognition memories.
Aug-16-17  Walter Glattke: 21.-Bf6 22.Rg7 Bxd4 23.Qxh7# / 22.-Bxg7 23.Qxg7# 21.-Qf6 22.Bxe7 e.g. Qxd4 23.Qxf8#
Premium Chessgames Member
  agb2002: White is one knight down.

Black threatens Nxf6.

The bishop on h4 prevents Qg5+. Therefore, 20.Rg3+ Kh8 (20... Bxg3 21.Qg5+ Kh8 22.Qg7#) 21.Qh6:

A) 21... Rg8 22.Rg7

A.1) 22... Nxf6 23.Rxh7#.

A.2) 22... Nf8 23.Rxg8+ Kxg8 24.Qg7#.

B) 21... Bxf6 22.Qg7+ Bxg7 23.Bxg7+ Kg8 24.Bf6#.

C) 21... Qxf6 22.Bxf6+ Bxf6 (22... Nxf6 23.Qg7#) 23.Bxd7 wins too much material.

Premium Chessgames Member
  OhioChessFan: I think the Monday and Wednesday puzzles got switched this week.
Aug-16-17  7he5haman: Is 16...Qxd2 17.Kxd2 Kd8/Bd8 really that bad for Black?

Don't get me wrong, it looks horrible and grovelling, and hindsight is a wonderful thing, but at least he isn't getting mated in a few more moves.

Aug-16-17  morfishine: Instantly saw <20.Rg3+>

which is unusual for me on Wednesday


Premium Chessgames Member
  thegoodanarchist: <morfishine: Instantly saw <20.Rg3+>

which is unusual for me on Wednesday >

Same here. This was easier than either Monday or Tuesday, IMO.

Aug-16-17  malt: Starting with 20.♖g3+ ♔h8
(20...B:g3 21.Qg5+ )
21.♕h6 ♗:f6
( 21...Rg8 22.Rg7 Nf8 23.R:g8+ K:g8 24.Qg7# )
22.♕g7+ ♗:g7 23.♔g8 ♗f6#
Premium Chessgames Member
  patzer2: Took me a while, but I finally worked my way move-by-move through the 20. Rg3+! solution and game continuation for today's Wednesday puzzle.

In the final position, I pondered for a few seconds before realizing it's mate-in-two after 23. Rxg8+ Kxg8 24. Qg7#.

Earlier in the combination (after 20. Rg3+! Kh8 21. Qh6,) if 21...Bxf6 (diagram below)

click for larger view

the clever 22. Rg7 Bxg7 23. Qg7# is mate-in-two. Even more clever is mate-in-three with 22. Qg7+ Bxg7 23. Bxg7+ Kg8 24. Bf6#. The simple 22. Rh3 Bxd4 23. Qxh7# also works for mate-in-two.

Black's decisive mistake is 17...Qd8? which allows the strong winning game move 18. Nf6+! +- (+3.74 @ 32 depth, Stockfish 8.)

Another strong move after 17...Qd8? is the paralyzing 18. Qb4! +- (+5.31 @ 30 depth, Stockfish 8) which wins the Black Queen after 18. Qb4! a3 19. Bb6 be7 20. Qc3 axb7 21. Bxd8 +- (+6.25 @ 30 depth, Stockfish 8.)

Instead of 17...Qd8?, Black can apparently hold it level with 17...Qxd2+ 18. Kxd2 = to ⩲ (+0.18 @ 33 depth, Stockfish 8,) as play might continue 18...Bd8 19.c4 a6 20.Bxd7+ Bxd7 21.Rxb7 Bc6 22.Rb2 Rc8 23.Kd3 h5 24.Rf1 Bd7 25.Ne3 Be6 26.c5 g6 27.Nc4 O-O 28.Nd6 Rc6 29.Rfb1 Bc7 30.Rb7 h4 31.Ke3 Kg7 32.Kf2 Rd8 33.R1b2 g5 34.a4 f4 35.h3 Kg6 = (0.00 @ 30 depth, Stockfish 8.)

Aug-16-17  Marmot PFL: The two moves considered were 20 Qh6 (which fails to Nxf6) and 20 Rg3+ (the rook can't be taken so Kh8 is forced). Then 21 Qh6 threatens Qg7 mate supported by both rook and pawn.

<patzer2> Those are some interesting lines. Huebner is a strong and usually cautious player so it's surprising he didn't trade queens.

Premium Chessgames Member
  takchess: The first two moves to be made jump out to be played. Nothing else makes sense.
Premium Chessgames Member
  patzer2: <Marmot PFL> Thanks!

Here's a few other side lines examining the strong winning f6 demolition <18. Nf6+! gxf6>

18...Bxf6 19.exf6 O-O 20.Bxd7 Qxd7 21.Rg3 g6 22.Kc1 f4 23.Qxf4 Kh8 24.Rh3 Qf5 25.Qh6 Qh5 26.Qg7#.

<19.exf6 O-O>

19...h6 20.Qb4 Bxf6 21.Re1+ Be7 22.Rg3 a5 23.Bxh8 Kf8 24.Bg7+ Kg8 25.Qxe7 Qxe7 26.Rxe7 Kh7 27.Rxf7 Kg8 28.Bc4 Nf8 29.Rxf8+ Kh7 30.Bg8#


19...Bxf6 20.Re1+ Be7 21.Qg5 h6 22.Qg7 Rf8 23.Qf6 Rg8 24.Rg3 Rf8 25.Bc5 f4 26.Rxe7+ Qxe7 27.Qxe7#.

<20.Rg3+ Kh8 21.Qh6 Rg8 22.Rg7 Nf8 1-0> Black resigns in lieu of 23.Rxg8+ Kxg8 24.Qg7#.

Aug-16-17  DrGridlock: I wanted to go quite directly for mate on g7. Seeing that 3 of black's pieces were tied down to defending f6, I thought that removing 1 (or 2) of them might work. However, in the line 23 Bxd7 Qxd7
24 g3

Nick DeFirmian - Robert Huebner

click for larger view

Black is saved by the rather deep resource that the rook on a1 is undefended. After

21 ... Rd8
22 Rd3 Qc6
23 Qh6
(I'm getting close to delivering mate on g7)
23 ... Qxh1+
24 Kd2 Qxh2+
25 Kc3

Nick DeFirmian - Robert Huebner

click for larger view

Black is out of checks and now must sac his queen to avoid mate:

25 ... Bxf6
26 Qxh2

But Komodo calls it fairly even at this point.

Premium Chessgames Member
  kevin86: I tried the queen move first- obviously needed the rook move.
Aug-16-17  swclark25: Got it, but would need lots of time on the clock in a real game situation.
Premium Chessgames Member
  ClassZPlaya: After
20. Rg3 Kh8
21. Qh6
I overlooked that if
21. ... Nxf6
22. Rxh7 mates because the Nf6 is pinned. Gave myself half credit for seeing the rest of the relevant lines.
Aug-16-17  RandomVisitor: After 17.Kd1

click for larger view

Stockfish_17081107_x64_modern: <5 hours computer time, 8 cores>

<+0.30/51 17...Qxd2+ 18.Kxd2 Bd8 19.c4 a6> 20.Ba4 0-0 21.Rhb1 b5 22.cxb5 axb5 23.Bxb5 Bb7 24.Ne3 f4 25.Nf5 Be4 26.Bxd7 Ba5+ 27.Ke2 Rfd8 28.Bc6 Bxf5 29.Bxa8 Bxb1 30.Rxb1 Rxd4 31.Rb8+ Rd8 32.Rxd8+ Bxd8 33.Kf3 Bc7 34.Kxf4 f6 35.Ke4 Bxe5 36.h3 Kf7 37.Kd5 Bf4 38.a4 Bd2 39.Kc5 f5 40.Kb5 Ke7 41.Bd5 Kd6 42.Bg8 h6 43.a5 Be3 44.Bh7 f4 45.Bg6 Kc7 46.Be4 Bf2 47.Kc4 Be3 48.Bf3 Kd6 49.h4 Bf2 50.h5

Aug-17-17  RandomVisitor: After 9.Qd2

click for larger view

Stockfish_17081107_x64_modern: <22 hours computer time, 8 cores>

<+0.17/55 9...Qxb2 10.Rb1 Qa3 11.Bb5 Nxd4 12.Bxd4 Bb4 13.Rb3 Qa5> 14.0-0 0-0 15.Qf2 f5 16.Rfb1 Bxc3 17.Bxc3 Qc7 18.Bb4 Rf7 19.h3 Qb6 20.Bd6 h6 21.Qxb6 Nxb6 22.Be8 Nc4 23.Bxf7+ Kxf7 24.Rxb7+ Bxb7 25.Rxb7+ Kg8 26.Re7 Nxd6 27.exd6 Rd8 28.Rxe6 Kf7 29.Re5 Rxd6 30.Rxf5+ Ke6 31.Re5+ Kf6 32.g4 g5 33.Rf5+ Kg6 34.a4 gxf4 35.h4 Ra6 36.h5+ Kg7 37.Rxd5 Rxa4 38.Kf2 Ra3 39.Rd6 a5 40.Rg6+ Kh7 41.Ra6 Kg7 42.c4 a4 43.c5 Rc3 44.Rxa4 Kf6 45.Rxf4+ Kg5 46.Ra4 Rxc5 47.Kf3 Rc7 48.Kf2

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