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Viktor Kupreichik vs Ivan Radulov
Plovdiv (Bulgaria) (1980), Plovdiv BUL
Sicilian Defense: Classical. Anti-Fischer-Sozin Variation (B57)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 31 times; par: 26 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Jul-26-15
Premium Chessgames Member
  agb2002: White has a knight for the bishop pair.

Black threatens 21... Qxc4.

The first idea that comes to mind is 21.d6 Bxd6 (21... Qxc4 22.dxe7 wins the exchange at least; 21... Qc5 22.dxe7 Qxe7 23.Nxe2 + - [2N vs B+P]) 22.Qxf6+ Kg8 23.Nxd6:

A) 23... Qxd6 24.Rf5

A.1) 24... h6 25.Qxh6 f6 26.Qg6+ Kh8 27.Rh5#.

A.2) 24... Rfe8 25.Qxf7+ Kh8 26.Rh5 and mate in three.

A.3) 24... Ng3+ 25.hxg3 Qxg3 26.Rg5+ Qxg5 27.Qxg5+ + - [Q+N vs R+B].

B) 23... Nxc3 24.Qg5+ Kh8 25.Rxf7 Rg8 (25... Rxf7 26.Nxf7#) 26.Qf6+ Rg7 27.Qxg7#.

C) 23... Qc5 24.Nxe2 Qxd6 (else drops a piece) 25.Rf5 as in A.

Jul-26-15
Premium Chessgames Member
  agb2002: I don't know why I overlooked the simple 24... exf5 25.Qxd6 Nxc3 making White's victory much harder.
Jul-26-15
Premium Chessgames Member
  morfishine: <scormus> My post, almost word for word, except I added: "I couldn't see it if I saw it"

*****

Jul-26-15  Moszkowski012273: I honestly think this is easier than yesterday's... A much more forcing line with less variables...
Jul-26-15  shameer654: after qc7 why not nxf6 and checkmating the black king on next move.why , i can't able to undestand that variation.
Jul-26-15  wooden nickel: <morfishine: <scormus> My post, almost word for word, except I added: "I couldn't see it if I saw it"> I think I saw it but couldn't see it?! ... at any rate Qxc2 kept spoiling things, so 24.Rf5! is the perfect move! <scormus>Good post!
Jul-26-15
Premium Chessgames Member
  Willber G: <shameer654: after qc7 why not nxf6 and checkmating the black king on next move.why , i can't able to undestand that variation.>

...Qc2 stops mate if Rf5 is not played first.

Jul-26-15
Premium Chessgames Member
  CHESSTTCAMPS: Black is currently a piece up, but with passively placed bishops and a castled position that is badly weakened. White's queen is in a great position to take advantage and the white rooks are active, sitting on semi-open files, immediately available for rook lifts. By diverting the bishop on e7, white can pick up f6 with check, putting the BK in critical condition and showing the weakness of black's tightly bunched pieces.

21.d6!

A) 21... Bxd6 22.Qxf6+ Kg8 23.Nxd6 Qxd6 (23... Nxc3 24.Nxf7 Rxf7 [otherwise 25.Nh6#] 25.Qxf7+ Kh8 26.Qf6+ Kg8 27.Qxc3 puts white an exchange up with a winning position) 24.Nxd2 Bc6 25.Ra3 and the threat of 26.Rg3+ is deadly.

B) 21... Qxc4 22.dxe7 wins with the double threat of 23.exf8=Q+ forcing mate and 23.Qf6+ Kg8 24.exd8=Q winning big material.

C) 21... Ng3+ 22.hxg3 Bxd6 23.Qxf6+ Kg8 24.Nxd6 Qxd6 25.Rf4! and the threat of Rg4+ is decisive, e.g. h5 26.Qg5+ Kh7|h8 27.Qxh5+ Kg7 28.Qg5+ Kh7|h8 29.Rh4#

Easier than Friday, unless I'm missing something. Time for review....

Jul-26-15
Premium Chessgames Member
  CHESSTTCAMPS: I never considered simply keeping the Q on h6.
Jul-26-15
Premium Chessgames Member
  LucB: <Bobby Spassky: "LucB: I got 21. d6, wanting to remove the Be7 from protecting f6, but I don't understand 24. Rf5.. whaa?" If nxf6 qxc2 stopping the mate,>

Thanks <Bobby Spassky>, ...'got it. Wow, cool trick!

Jul-26-15  greenfield67: Didn't see Rf5, because I'd already missed the defensive move Qc2 :(
Jul-26-15
Premium Chessgames Member
  thegoodanarchist: Love the final position! If Black plays Rdg8 White still threatens two different Arabian checks, first on h7 and the second, on g8 is mate. Too bad Black didn't play it out.
Jul-26-15  devere: 21. d6 Bxd6 22. Nxd6 Qxd6 23. Ne4 Qc7 24. Rf5! Ng3+ 25. hxg3 Rg8 26. Nxf6 Rg7 27. Rg5 Rdg8 28. Nxg8 Rxg5 29. Qxg5 Qxc2 30. Ne7 and White wins.


click for larger view

Jul-26-15
Premium Chessgames Member
  Jimfromprovidence: 22...f5?! (with the idea of 23...f6) is a nice try that does not work.


click for larger view

White to play and win.

Jul-26-15
Premium Chessgames Member
  patzer2: Here's my look at the game and the Sunday puzzle (21. ?) with the chessgames.com opening explorer (OE) and Deep Fritz 14:

<1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Qb6> With 917 games in the OE, this is the second most popuar move. The most popular move, with 1,575 games in the OE, is 6...e6 as in D Aldama Degurnay vs G Kacheishvili, 2014.

<7. Nb3> This prudent reply is the popular move and the Fritz first choice.

If 7. Be3?! Black's position is fine after taking the "not so poisoned" pawn with 7... Qxb2 when play might continue 8. Ndb5 Qb4 9. Bd3 (9. Qe2 Nxe4 ) 9... Qa5 10. Rb1 e6 11. O-O Be7 12. Qd2 O-O 13. h3 a6 14. Nd4 Qc7 (-0.60 2 20 depth, Deep Fritz 14).

<7... e6 8. Bg5> There are only 41 games in the OE with 8. Bg5. Black won 44% and White won 29% of those games , and the last time 8. Bg5 was played in the OE data base was in 2012. So despite White's fine victory here (and the fact Fritz evaluates 8. Bg5 equal) it is a move that is seldom played.

The popular move and the Fritz first choice, with 246 games in the OE, is 8. O-O as in M Bartel vs A Jankovic, 2009.

<8... a6 9. O-O Be7> An interesting alternative is the Fritz favorite 9... Ne5 as in A Yegiazarian vs I Ivanisevic, 2000.

<10. Bxf6 gxf6 11. Qh5 Ne5> Here the game enters unexplored territory, as this is the only game with this move in the OE.

<12. Be2 O-O> Here Fritz prefers 12... Bd7 13. a4 O-O-O 14. a5 Qc7 15. f4 Ng6 16. g3 Kb8 17. Rad1 Rhg8 18. Kh1 Bc6 = (+0.12 @ 20 depth, Deep Fritz 14).

<13. Kh1 Kh8 14. a4 Bd7 15. a5 Qc7 16. Nd2 Ng6 17. Nc4 Rad8 18. f4 d5?> This is a mistake which gives White a clear advantage.

Black can hold it level with 18... Bc6 when play might continue 19. Rad1 d5 20. exd5 exd5 21. Ne3 Nxf4 22. Qh6 Nxe2 23. Rf3 Bd7 24. Rxd5 Rg8 25. Rh5 Rg7 26. Nxe2 f5 27. Rg3 Qe5 28. Nd5 Rdg8 29. Nxe7 Qxe7 30. Rxg7 Rxg7 31. Qd2 Bc6 = (0.00 @ 23 depth, Deep Fritz 14).

<19. exd5 Nxf4?> One mistake leads to another, as Black is very nearly lost after White's reply.

Instead, Black can make a fight of it with 19... f5 when play might continue 20. Qf3 Bc5 21. Rad1 Rg8 22. g3 f6 23. d6 Qb8 24. Qd3 e5 25. Nd5 Bxd6 26. Bf3 Bb5 27. Nxf6 Be7 28. Nd5 Bf8 29. Qe2 exf4 30. Nxf4 Bg7 31. Bd5 Rge8 32. Qh5 Nxf4 33. Rxf4 Qc7 34. b3 Re7 35. Qxf5 Bc6 36. Kg1 Bd7 37. Qh5 Be8 38. Qf3 Bg6 39. Qf2 Bh6 40. Rh4 Rf8 41. Qd4+ Bg7 42. Qd2 Rd8 43. Kg2 Qd7 44. Qg5 Qe8 45. Rd2 Re2+ 46. Kf3 Rxd2 47. Qxd2 Qd7 48. Nb6 Qf5+ 49. Kg2 Qe5 50. c4 Be4+ (+ 0.41 @ 22 depth, Deep Fritz 14).

<20. Qh6!> This strong move sets up our (21. ?) Sunday puzzle.

<20...Nxe2??> This loses quickly.

Black can put up more resistance with 20... exd5 when play might continue 21. Rxf4 dxc4 22. Rxc4 Qb8 23. Rh4 Bf5 24. Bd3 Rxd3 25. cxd3 Qd6 26. d4 Rc8 27. Qf4 Bg6 28. Qxd6 Bxd6 29. g3 f5 30. Kg2 Kg7 31. d5 f4 32. gxf4 Rc4 33. Ra4 Rxa4 34. Nxa4 Be4+ 35. Kg3 Bxd5 36. Nc5 f6 37. b4 to (+1.30 @ 21 depth, Deep Fritz 14).

<21. d6! > (+7.38 @ 20 depth, Deep Fritz 14) This is the winning move which punishes 20...Nxe2?? and solves today's Sunday puzzle.

<21...Bxd6 22. Nxd6 Qxd6 23. Ne4 Qc7 24. Rf5!> This is by far the strongest follow up, forcing mate-in-19 according to Fritz.

White can also win with the "obvious" 24. Nxf6 but it takes longer as White puts up more resistance after 24...Qxc2 25. Nxd7 Qg6 26. Qxg6 hxg6 27. Nxf8 Rxf8 when play might continue 28. Rad1 e5 29. Rd7 f5 30. Rxb7 Rd8 31. Rb6 Kg7 32. Rxa6 e4 33. Rb6 (+4.41 @20 depth, Deep Fritz 14).

<24... Rg8 25. Nxf6 Rg7 26. Rg5 1-0>

Black resigns in lieu of 26...Ng3+ 27. hxg3 Rdg8 28. Nxg8 Rxg5 29. Qxg5 h6 30. Nxh6 Kh7 31. Ng4 Qxc2 (31... Qd8 32. Qxd8 ) 32. Qh6+ Kg8 33. Nf6#.

Jul-26-15  Ayaend: 24. "White to play "
it's better !
Jul-26-15
Premium Chessgames Member
  cormier: how about 24.Nxf6 ...
Jul-26-15  Conrad93: I wish I had known it was this easy. This isn't a four star puzzle at all. the only difficult move to see is 24. Rf5 which cuts of the diagonal protecting h7.
Jul-26-15
Premium Chessgames Member
  Marmot PFL: Did not find this solution. 21 d6 was easy but I would have played Qxf6+ on move 22 or 23. Black's game looks quite bad in any case. 18... d5 seems to fail and maybe black castled the wrong way (not an easy decision).
Jul-26-15  scormus: <morfishine ..... "I couldn't see it if I saw it">

Unfortunately I have a habit of that in games :(

Jul-26-15  Compound Error: Is chrisowen flan (again)?
Jul-27-15
Premium Chessgames Member
  CHESSTTCAMPS: Following is a link where you can play Crafty from the puzzle position:

http://www.chessvideos.tv/endgame-t...

If you went for 22.Qxf6+ instead of the game move, black has a defense that makes it very difficult for white to win.

Jul-27-15  gotgat54: <devere> You missed this clever variation

21. d6 Bxd6 22. Nxd6 Qxd6 23. Ne4 Qc7 24. Rf5! Ng3+
and now not 25. hxg3 but 25 Nxg3 exf5 26 Qxf6+ Kg8 27 Nh5, and mates.

In this variation, if 25 ... Rg8 then 26 Qxf6+ Rg7 27 Rg5 Rg8 28 Rxg7 Rxg7 29 Nh5 )

Jan-10-16  clement41: A-ma-zing Rf5!!
Reminds me of Rf6!! in Fischer-Benko
Jan-10-16  ughaibu: Here's another: Kotov vs M Yudovich Sr., 1939 With a bonus kibitzing error from me.
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