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Wesley So vs Elshan Moradiabadi
Final Four of College Chess (2014), New York, rd 3, Apr-??
Bogo-Indian Defense: Grünfeld Variation (E11)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Sep-24-17  kungfufighter888: This one is a master piece
Sep-24-17  RandomVisitor: Better is 18...Kf7
Sep-24-17
Premium Chessgames Member
  An Englishman: Good Evening: Wow. Too swashbuckling for me to solve. Oh, well. Monday's coming.
Sep-24-17  leRevenant: Has anyone else experienced an upgraded chessboard today?
Sep-24-17  stacase: <leRevenant: Has anyone else experienced an upgraded chessboard today?>

It says on my viewer:

<NOTE: You are using our new chess viewer, "Olga." For more info see the Olga Quickstart Guide. You can switch back to the old viewer (pgn4web) from the pulldown menu below. If you have questions or suggestions see our Olga chessforum.>

Sep-24-17  Altairvega: 18 Bh7+ Kf7 19 Qg6+ Ke7 20.hxg5 Qe8
30 Rg4 QxQ 31 BxQ and white takes back the piece i.e. the black bishop who has nowhere to go..white continues the attack I don't know whether it wins or no. I did not consider the 18 ..Kh8, since I thought the Kf7 was stronger defense for Black
Sep-24-17  WorstPlayerEver: Positions like these give me a headache.

Anyway, it seems Black had to play 14... Be7 eyeing at Nf6 to organize the Black defense. While in the game Black simply blocked their own defense.

Sep-24-17
Premium Chessgames Member
  Willem Wallekers: Yes I have Olga as well. One improvement is that you can try out other moves like 18 ... Kf7. I used to do that with Chess Viewer Deluxe, but my current browser disallows use of Java.
Sep-24-17  DonPepe: 22.Qg6 suits my taste.

Call this game "Gung Ho"

Sep-24-17  mel gibson: I would have said 18. h4xg5.

The computer agrees with the first few test move & says:

18. Bh7+ (18. Bh7+ (♗d3-h7+
♔g8-h8 ♖g1xg4 g5xh4 ♘d2-f3 g7-g5 ♕c2-g6) +0.34/16 299)

score for white +0.34 depth 16.

That's basically a draw.

Sep-24-17  Walter Glattke: 18.hxg5 Bxg5 19.Bg6 threatening Rh7 and Rgh1 should be win.
Sep-24-17  lproyect: I am really not qualified to comment here on moves but I appreciate the new viewer since it allows me to move pieces. Often when I used to be confused about an end game using the Java interface, I liked to try alternative moves. When Java support ended, I lost that ability. Thanks for providing it using a different technology.
Sep-24-17  Ratt Boy: Totally agree with <lproyect>. I'm glad to (finally) have regained the ability to play through my own analysis.
Sep-24-17  mel gibson: mel gibson:
Correction - a few words were in wrong places.
I would have said
18. h4xg5.

The computer agrees with the first few moves & says:

18. Bh7+ (18. Bh7+ (♗d3-h7+
♔g8-h8 ♖g1xg4 g5xh4 ♘d2-f3 g7-g5 ♕c2-g6) +0.34/16 299)

score for white +0.34 depth 16.

That's basically a draw so not much of a puzzle.

Sep-24-17
Premium Chessgames Member
  patzer2: I found today's Sunday puzzle solution 18. Bh7+ Kh8 19. Rxg4 +- easier to understand after I played through and analyzed the game with Stockfish 8 and the Opening Explorer:

<1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2 d5> This is playable, but the computer and most masters prefer the popular alternatives 4...b6 as in the draw in Navara vs K Miton, 2017 or 4...O-O as in Black's win in N Vitiugov vs E Najer, 2017

<5.Qa4+ Nc6 6.a3> ⩲ (+0.34 @ 34 depth, Stockfish 8) With this forcing follow-up White already has a slight but lasting advantage.

<6...Bd6?> This seldom played move (see Opening Explorer) wastes precious tempo in the opening, as becomes obvious after White's strong but simply reply.

Better instead are the popular options 6...Bxd2+ as in the draw in Dreev vs E Safarli, 2016 or 6...Be7 as in the draw in A Korobov vs Y Kuzubov, 2014.

<7.c5! Be7 8.b4> ⩲ (+0.41 @ 33 depth, Stockfish 8) With a stronger pawn structure, and Black's light Squared Bishop and Rook out of play, White enjoys a clear advantage which will facilitate the coming attack on Black's weakly defended Kingside.

<8...O-O> The computer prefers 8...Ne5 9. e3 f5 10. Ne5 Bd7 11. Nxd7 ⩲ (+ 0.38 @ 36 depth, Stockfish 8) with only a slight edge for White.

<9.e3 a6 10.Bd3 Nd7 11.Bb2 f5 12.Qc2 Bf6 13.h4 h6 14.O-O-O!> This is not the computer first choice, but with most of Black's pieces locked down on the Queenside, White correctly judges his King is safe (despite his advanced pawns) and that Queenside castling gives him a strong advantage in an all out assault on Black's Kingside.

<14...Rb8> According to the computer, Black has nothing better than shuffling his undeveloped pieces with this move or 14...Be7 15. Ng1 ⩲ or 14...Rf7 15. Rdg1 ⩲.

<15.Rdg1 b6 16.g4 fxg4 17.Ng5!!> With Black's Queenside pieces largely undeveloped and out of play and the Black Kingside weakly protected, White correctly assesses he can afford to give up a piece to facilitate his attack.

<17...hxg5> Black apparently has nothing better, as the next best alternative 17...Bxg5 18. hxg5 19. f4 +- (+2.33 @ 28 depth, Stockfish 8) gives White an even stronger winning advantage.

<18.Bh7+!> This initial follow-up to 17. Ng5!! solves today's Sunday puzzle.

<18...Kh8> Putting up more resistance, but still leaving White with a strong advantage and excellent winning chances, is 18...Kf7 19.hxg5! Bxd4 20.Bxd4 Nxd4 21.Qg6+ Ke7 22.exd4 Rf7 23.Qd3 a5 24. Qd4 ± to +- (+1.51 @ 32 depth, Stockfish 8.)

<19. Rxg4!> An essential winning move. Not 19.Qg6? gxh4 20.Qh5 Bg5 21.Rxh4 Bh6 22.Bc2 Rf5 23.Qxg4 Qf6 24.Bxf5 exf5 25.Qf4 Rb7 =.

<19...gxh4 20.Nf3 g5 21.Nxg5 Bxg5 22.f4 Nf6> This makes it easy for white. Putting up more resistance, but still losing, is 22...Bh6 23.Bg6 Nf6 24.Rgxh4 +- (+4.12 @ 29 depth, Stockfish 8.)

<23.Rxg5 Nxh7 24.Qxh7+ 1-0> Black resigns in lieu of 24...Kxh7 25. Rxh4#.

Sep-24-17  ndg2: "Olga" is OK. But I somehow miss the old keyboard shortcuts. Did not try out the alternative moves feature yet.
Sep-24-17  leRevenant: Thank you <stacase:> for fully answering my question. I am a patzer when it comes to Apps (as well as to chess) and don't even possess a smartphone, just an old steam powered PC.

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