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Ian Rogers vs Vitomir Arapovic
Biel MTO op (1985)
Modern Defense: Queen Pawn Fianchetto (A40)  ·  1-0

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Oct-15-06  stephenw: I saw d6 as my favorite move immediately, but I didn't see the continuation. :(
Oct-15-06  black knight c6: Since no-one seems to want to give a variation for 23. Nxh5 (including chessmoron, wtf is Nxc6?) I'll try one, because I want to know whether it actually works: 23. Nxh5 gxh5
24. Rxh5 Bxh5
25. Rh1 Kg5
26. Rxh5 Kxh5
27. g6 Forces Rc4 or mate
27. Qh3+ or g4+ gets complicated, but might not get a mate...

This is the DIRECT approach to Nxh5, and black is also being super greedy. Can anyone see winning paths for white around these sorts of lines?

Oct-16-06  Sasquatch777: Is it just me, or does 17...Kh7 seem like a wasted move?
Oct-16-06  TrueFiendish: White threatened 18.d6 and 19.Bc4. The other ways of defending against that seem no better.
Oct-16-06
Premium Chessgames Member
  kevin86: I nice puzzle-Who have gone for the clearence move at d6? Delightful queen sac at end!
Apr-22-18  Cheapo by the Dozen: I saw d6 as now-or-never, to forestall the ... Nd6 blockade.

And of course I saw danger for Black on the h-file.

What I whiffed on was the further danger on the g-file.

Apr-22-18
Premium Chessgames Member
  Penguincw: I probably have no chance of getting this Sunday puzzle, but well, I guessed moves like d6, g6+ and Nxh5, in no particular order.

But it's been one of my best weeks ever, and can't wait to restart tomorrow (Monday).

Apr-22-18  landshark: I found 23.d6, Nd6 but strayed immediately with 24.Nxh5 to which I figured ...gxh5 25. g6+ Bxg6 26. Rdg1 Rf7 27. Bxf7 Nxf7 28. Rxh5+ Kg8 led to a promising position which seems true with 29. Bc5 which looks very dangerous. Black probably has improvements somewhere that I missed - after all, it is Sunday...
Apr-22-18  patzer2: Failing to see an immediate winning combination sacrifice, I went for 23. Rdg1 ± (+1.43 @ 20 ply, Stockfish 9 analysis of move 23...?).

However, I didn't look as deep as White in this game in preparing 24. Rdg1! with the clever clearance move 23. d6!! +- (+8.12 @ 20 ply, Stockfish 9 analysis of move 23...?).

Apr-22-18  patzer2: For an improvement for the losing side, I'd start early in the opening and look to do better with 4...e5 = to ⩲ (+0.25 @ 31 ply, Stockfish 8) as in Black's win in N Brunner vs Fressinet, 2012.
Apr-22-18  mel gibson: I thought - Nxh5 & I checked - it works
but Stockfish 8 says:

23. d6 !

(23. d6 (d5-d6
♘c8xd6 ♘g3xh5 g6xh5 ♕g2-g4 ♖f8-f7 g5-g6+ ♔h7-g8 g6xf7+ ♗e8xf7 ♗b3xf7+ ♔g8xf7 ♕g4xh5+ ♘e7-g6 ♖d1-g1 ♕d8-f6 ♘c3-d5 ♖a8-h8 ♘d5xf6 ♖h8xh5 ♘f6xh5 ♘d6-c4 ♗e3xa7 ♗g7-f8 ♘h5-g3 ♔f7-e6 ♔b1-c2 ♘c4-d6 ♖h1-h7 ♘g6-e7 ♔c2-b1 b7-b6 ♘g3-h5 ♔e6-d7 ♖g1-g8 ♗f8-h6 ♗a7-b8 ♘d6-b5 ♘h5-f6+ ♔d7-e6 ♖h7xh6 ♘e7xg8 ♘f6xg8+ ♔e6-d7 ♘g8-f6+ ♔d7-c8 ♖h6-h8+ ♔c8-b7 ♘f6-d5) +11.34/31 50)

score for White +11.34 depth 31.

If I force Stockfish 8 to make my move it's still good.

(23. Nxh5 gxh5
(g6xh5 d5-d6 ♘e7-g8 d6-d7 ♗e8-g6 ♘c3-e2 ♗g7-h6 ♘e2-g3 ♘c8-e7 ♘g3xh5 ♘e7-c6 ♖d1-g1 b7-b5 ♘h5-f6+ ♖f8xf6 g5xf6 ♕d8xf6 ♗b3xg8+ ♔h7xg8 ♕g2xg6+ ♕f6xg6 ♖g1xg6+ ♗h6-g7 ♖g6xc6 ♖a8-d8 ♖c6xc7 ♔g8-f7 ♗e3xa7 ♔f7-g6 ♗a7-e3 ♔g6-f6 ♖h1-h5 ♔f6-g6 ♖h5-g5+ ♔g6-f7 ♖g5-f5+ ♗g7-f6) -10.53/27 23)

score for Black -10.53 depth 27

Apr-22-18
Premium Chessgames Member
  WorstPlayerEver: -23. Nxh5 gxh5 24. d6 cxd6 25. Qg4
-24... Ng8 25. d7 Bg6 26. Qg4 Nce7 27. Rxh5+ Nh6 28. Rhh1
Apr-22-18  Walter Glattke: 23.Nxh5 gxh5 24.Qg4 Qd7!? 25.Rxh5+ Kg8
26.d6+ Rf7 27.Qxd7 Bd7 28.dxe7 Nb6 29.g6/
25.-Bxh5 26.Qxh5+ Kg8 27.d6+ Rf7 28.Qxf7+ Kh8 29.Rh1+ mating
Apr-22-18  Andrew Chapman: <black knight c6> in your line after 27.. Rc4, the computer gives a small advantage for black. Andrew
Apr-22-18  Walter Glattke: 23.Nxh5 gxh5 24.Qg4 Nd6 seems to win after 25.Rxh5+ Bxh5 26.Qxh5+ Kg8 27.g6 Rf6 28.Rg1 Qe8 29.Qh7+ Kf8 30.Bh6 Rxg6 31.Bxg7+ Kf7 32.Be5+ Kf8 33.Bg7+ Kf7 34.Rxg6 Nxg6 35.Bh8+ Kf8 36.Qg7#
Apr-22-18
Premium Chessgames Member
  WorstPlayerEver: Nice line 23. Nxh5 gxh5 24. d6 cxd6 25. Qg4 Qd7 26. g6+ Bxg6 27. Rxh5+ Bh6 28. Rxh6+ Kg7 29. Rh7+ Kxh7 30. Qh4+ Bh5 31. Qxh5+ Kg7 32. Qh6#
Apr-22-18  morfishine: <23.d6> seems the most natural move because it does so much. The diagonal is opened hitting <g8>, <d5> is cleared as a useful transfer square for the Knight, Black's Knight on <e7> is attacked so Black must take time to deal with the pawn on <d6>

Of course, I didn't see the eventual Queen sac

*****

Apr-22-18  tal fan: Position is ready to winning victims. Plenty options! My line seems more bright than all that saw here: 23.d6 Nxd6 24. Nxh5 gxh5 25. g6+ Bxg6 26. Qxg6+ Kxg6 27. Rdg1+ Kf6 28. Bg5+ Kg6 29. Bxe7+ Kh6 30. Bxd8 Raxd8 and after 31.Nd5 white is much better. Or 26...Nxg6 27.Rxh5 Bh6 28.Rxh6 Kg7 29.Bxh6+
Apr-22-18
Premium Chessgames Member
  agb2002: White can open lines against the black king with Nxh5 and d6. The appropriate order seems to be 23.d6 followed by Nxh5:

A) 23... Nxd6 24.Nxh5 (threatens 25.Nf6#) 24... gxh5 25.g6+

A.1) 25... Bxg6 26.Rdg1 (threatens Rxh5+ and Qxg6+)

A.1.a) 26... Qe8 27.Rxh5+ Bh6 (27... Bxh5 28.Qxg7#) 28.Bxh6 seems to win (threatens 29.Bxf8+ Bxh5 30.Qg7#).

A.1.b) 26... Ne8 27.Qxg6+ Nxg6 28.Rxh5+ Bh6 29.Rxh6+ Kg7 30.Rgxg6#.

A.2) 25... Nxg6 26.Rxh5+ Bh6 27.Rxh6+ Kg7 28.Rdh1 wins.

A.3) 25... Kh8 26.Rxh5+ Bh6 27.Rxh6+ Kg7 28.Rh7+ Kf6 29.Qg5#.

B) 23... Ng8 24.d7 Bxd7 25.Nxh5 looks winning (25... gxh5 26.g6+ Kh8 27.Rxh5+ Nh6 28.Bxh6 Bxh6 29.g7+ Kh7 30.Rxh6+ Kxh6 31.Rh1+ and mate in two).

Apr-22-18  pdxjjb: No hope for me to get this one. The computer has to get to like 17 ply before its analysis shows how much trouble white is in. Amazing job by Rodgers to find this over the board. Wow.
Apr-22-18  NBZ: The way I went about this: imagine there was no pawn on d5 (so the bishop b3 covers f7 and g8), and the Black bishop was not guarding g6-h5. Then White can play Nxh5 gxh5 Rxh5+ Kg6 Rh6+! Bxh6 gxh6+ with mate to follow.

So the first move is easy: 1. d6! Nxd6.
We solve problem #1 which is to get rid of the d5 pawn and cover the critical f7 and g8 squares with our bishop.

The second problem is the Be8, and for a long time I thought of ways to distract it, for example with Nb5. But of course Black will not be distracted so easily. Eventually it hit me that we need to approach the problem differently, and simply pile up on h5. The Be8 is the only defender, and there is no way for Black to bring a second defender.

So that gives us a fairly simple solution:

1. d6! Nxd6 2. Nxh5 gxh5 3. Qg4! and it's clear that White is winning since Rxh5+ is impossible to stop. Ng8 to try to block the check on h6 also fails since Ng8 Rxh5+ Bxh5 Qxh5+ Nh6 g6+ wins.

I see that in the game White opted for a prettier line, but it's also more complicated. I am happy with this line.

Apr-22-18  BOSTER: <NBZ> What if black play Bf7 after <Qg4>.
Apr-22-18
Premium Chessgames Member
  WorstPlayerEver: <BOSTER> g6 I suppose.
Apr-22-18  NBZ: <WorstPlayerEver>: Yep, g6 does the trick.
Apr-22-18  landshark: Upon further review there are a lot of ways to win this once you've played d6 and Nxh5 - What a feast of variations - I'd love to get to such a place OTB in a classical game.
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