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Thomas Ernst vs Bachar Kouatly
Thessaloniki Olympiad (1984), Thessaloniki GRE, rd 4, Nov-22
Sicilian Defense: Old Sicilian. Open (B32)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Mar-30-18  Straclonoor: Typical sacrifice on h7 goes on beatiful attack moving black king in center of board!
May-02-20
Premium Chessgames Member
  al wazir: The fist move is pretty easy to find (what else is there?), and the next four are the obvious continuation. At that point the black ♔ is in the middle of the board, flying for his life, and white has a choice of ways to finish him off.
May-02-20  unferth: "very difficult"? this plays itself.
May-02-20
Premium Chessgames Member
  agb2002: White has the bishop pair and a pawn for a bishop and a knight.

Black threatens axb5.

After 16.Bxh7+ Kxh7 17.Qh5+ Kg8 18.Re3 Qxb5 19.Rh3 f6 (19... f5 20.Qh8+ Kf7 21.Qf8+ Kg6 22.Rg3+ Kh7 23.Qf7 wins) 20.Qh8+ Kf7 21.Qf8+ Kg6 22.exf6, threatening 23.fxg7, looks very good for White.

May-02-20  stacase: <al wazir: The fist move is pretty easy to find (what else is there?)> <unferth: "very difficult"? this plays itself.>

I concur, 16.Bxh7+ was as obvious as the north end of a south bound goat. Most of what followed was equally obvious.

May-02-20  latebishop: I don't understand why Black can't just play 18...Nxd6 instead of 18...f6?
May-02-20  Brenin: <latebishop>18 ... Nxd6 19 Rh3 (threatening mate by Qh8) Kf8 20 exd6 (repeating the threat) Rxd6 21 Qg5, or 20 ... Ke8 21 Nc7+, both winning easily.
May-02-20  Brenin: This problem is both very easy and very difficult, depending on how you approach it. Anyone but a complete beginner can find the first move (especially as the position is presented as a puzzle); the alternatives, such as 16 Nd4 Nxd6 or 16 Re3 g6, are unappealing, anyway. After 16 Bxh7+ the next few moves are automatic, and whatever Black tries when he has a chance to choose, White should be able to press home the attack without too much difficulty. What is much harder (at my level, anyway) is to satisfy yourself beforehand that White can deal with all of the possible defences available to Black: taking either way on d6 or b5, pushing the f pawn, etc. OTB, against a good player I would have sac'd the bishop, and hoped for the best; against a weaker opponent I probably wouldn't have risked it.
May-02-20  goodevans: I guess the only thing that makes this "very difficult" is the plethora of plausible defences for black on move 18. As well as <18...f6> there's <18...g6>, two ways to capture on d6, two ways to capture on b5 and even moves like <18...Nf6> to consider.

I have to admit I didn't look at them all (<agb2002> is usually pretty thorough so let's see what he comes up with). That said, white's attack pretty much plays itself making this a strangely unsatisfying puzzle.

May-02-20  mel gibson: I saw that but I didn't know whether I should move the Rook out first to e3 or just Bxh7+.

Stockfish 11 says:

16. Bxh7+

(16. Bxh7+ (♗d3xh7+ ♔g8xh7 ♕d1-h5+ ♔h7-g8
♖e1-e3 f7-f5 ♖e3-h3 ♕a5-a4 ♕h5-h8+ ♔g8-f7 ♕h8-f8+ ♔f7-g6 ♖h3-g3+ ♕a4-g4 ♖g3xg4+ f5xg4 ♗d6-e7 ♗c8-d7 ♗e7xd8 ♖a8xd8 ♘b5-d6 ♘e8xd6 ♕f8xd6 ♔g6-h7 ♖a1-b1 ♗d7-c8 ♕d6-c7 ♔h7-g8 ♖b1-e1 ♔g8-f8 ♔g1-f1 ♗c8-d7 ♖e1-d1 ♔f8-e7 ♔f1-g1 ♔e7-e8 c3-c4 ♘c6-e7 ♖d1-d4 g7-g6 c4-c5 ♘e7-f5 ♖d4-d2 ♘f5-e7 ♖d2-d1 g6-g5 ♕c7xb7 ♗d7-c8 ♖d1xd8+ ♔e8xd8 ♕b7-b4 ♔d8-e8 ♕b4xg4 ♔e8-d8 g2-g3 ♔d8-e8 ♕g4-h5+ ♔e8-d8 ♕h5xg5 ♔d8-e8 ♕g5-e3) +9.08/39 81)

score for White +9.08 depth 39

May-02-20
Premium Chessgames Member
  Predrag3141: The line Stockfish gave, 16 Bh7+ Kxh7 17 Qh5+ Kg8 18 Re3 f5 19 Rh3 is the one I was most worried about. What worried me after that was not 19 … Qa4 but 19 … Nxd6 20 Nxd6 Rxd6 21 exd6. Looking ahead 5 moves I could not evaluate that position, or be sure 20 Nxd6 was the right continuation for White.
May-02-20
Premium Chessgames Member
  Predrag3141: … and now I see that 16 Bh7+ Kxh7 17 Qh5+ Kg8 18 Re3 f5 19 Rh3 Nxd6?? 20 Nxd6 forces mate because 20 … Rxd6 21 Qe8#. If I'd seen that I'd have been a lot more confident of 16 Bh7+.
May-02-20
Premium Chessgames Member
  chrisowen: Heavy load bh7 no?
May-02-20
Premium Chessgames Member
  erniecohen: Stockfish actually thinks this is a pretty hard problem; it doesn't consider ♗h7+ the best move until 20/30. For comparison, it finds the "Game of the Century" move ♗e6 on 10/17.
May-02-20
Premium Chessgames Member
  dorsnikov: If this your new diagram format for these puzzles....it stinks!
May-02-20  King.Arthur.Brazil: <Chris: heavy load ♗h7>! Undoubtedly, Black has provided reasons for White kingside attack. Two pieces on the 8th rank, unconnected R, low space and development, ♕ outside of battle field and blocked in Q side. White has strong ♗ on d6, easy to plant the ♕ and the ♖ in action. Looking for these point of views, the sacrifice is justified. Also, if Black refuse it, the situation is worst: 16. ♗xh7+ ♔h8 17. ♕h5 g6 18. ♗xg6+ ♔g7 19. ♕h7#. In the resulting combination, I found the same moves as the White player, although I made a mistake in 21. ♖g3, where clearly 21.♕f8+ is best!
May-02-20
Premium Chessgames Member
  drollere: midgame position; black's pieces cramped and blocked on the Qside; a bishop sacrifice, a Q check and a R lift ... i followed the game up to black's 21. .. g6, which gives hope but no real rescue.
May-02-20
Premium Chessgames Member
  chrisowen: <King.Arthur.Brazil> Around here it is called a monster!
May-02-20
Premium Chessgames Member
  chrisowen: Dascher donner and blitzen no?
May-02-20  Granny O Doul: That's about as trapped a king as I've ever seen.

As far as diagram format, it looks just the same as always to me. One thing that has recently changed is I'm no longer able to insert a blank line between paragraphs.

May-02-20  stacase: <Granny O Doul: ... I'm no longer able to insert a blank line between paragraphs.>

I noticed that too.

May-02-20
Premium Chessgames Member
  OhioChessFan: Sure you can.
 
No problem.

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