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Guido Caprio vs Paolo Fiorentini
Porto San Giorgio op-A 21st (2009), Porto San Giorgio ITA, rd 6, Aug-26
Anderssen Opening: General (A00)  ·  1-0



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Kibitzer's Corner
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Aug-31-16  saturn2: Black threatens to open the g file. For white there is N,B or R to sacrfice on c6. I choose the first. Black has to play 23..bxN but now the b file is open for a queen check and black will be mated soon.
Aug-31-16  lost in space: Saw the sequnce 23. Nxc6+ bxc6 24. Qb3+ were 3 pieces are attacking the lonely black king (Rc1, Be4, Qb3). What ever Black does (Ka8, Kc8, Kc7) White can take Pc6 with check and the attack goes on. Havenít seen the mate but I smelled it.
Premium Chessgames Member
  agb2002: White has a knight and a pawn for a rook.

Black threatens gxh4.

White can attack the black king with four pieces, starting with a sacrifice on c6, most likely 23.Nxc6+:

A) 23... bxc6 24.Qb3+ Kc7(8) (24... Ka8 25.Bxc6#) 25.Rxc6+ Kd7 26.Qb7+ Ke8 27.Bg6+ Rf7 28.Qxf7#.

B) 23... Kc7(8) 24.Ne5+ and 25.Nxg4 wins.

C) 23... Ka8 24.Qa4

C.1) 24... bxc6 25.Qxc6+ Kb7 26.Qb7#.

C.2) 24... a6 25.Nxd8 (25.Ne5 Qe6 -25... Bxe5 26.Qxa6+ Kb8 27.Qxb7#- looks unnecessarily complex)

C.2.a) 25... B(R)xd8 26.Qxa6+ Kb8 27.Qxb7#.

C.2.b) 25... Qh3+ 26.Bg2 wins.

C.2.c) 25... Ka7 26.Bxb7 wins.

C.3) 24... Qh3+ 25.Bg2 wins due to Qxa7# and Bxh3.

Aug-31-16  AlicesKnight: Got it - the question was which piece to use to capture c6. If Black simply plays ....Ka8 does White regain the exchange and follow up with Rc7 and Qb3? Hang on, <NBZ> has an answer...
Aug-31-16  Cheapo by the Dozen: Nice one by <NBZ>. I didn't get that far. I just noted that Black has a slight material advantage plus scary attacking chances, but that if Black declines White's sacrifice, then:

-- Material has flipped to White's advantage.

-- Black has one less piece to attack with.

-- White still has an attack, so Black has tempo issues in pursuing his attack as well.

Premium Chessgames Member
  al wazir: The only hard part was deciding between 23. Nxc6+ and 23. Na6+. The latter has the possibility of a couple of nice mates: 23...Ka8 24. Rxc6+ bxc6 (24...bxa6 25. Rc8#) 25. Bxc6#. Those continuations aren't forced, but I think it's still a win.

I went with 23. Nxc6+, as in the game. However, black doesn't have to capture. If, e.g., 23...Ka8 24. Nxd8 Bxd8, white has a two-♙ advantage, but winning with opposite-color ♗s on the board is non-trivial.

Aug-31-16  YouRang: Wednesday 23.?

click for larger view

White has a bunch of firepower aimed at black's king position. In particular, that Pc6 seems to be waving a flag saying "tactic starts here". But how?

I'm thinking <23.Nxc6+> because (1) it's check, hence forcing, and (2) it opens the b-file for the queen. If <23...bxc6>, then <24.Bxc6>

click for larger view

White threatens Qb3+ and Qb7#. Black's K can't go the the kingside due to the queen-losing discovered check (e.g. 24...Kc7? 25.Bf3+).

What can black do?

- 24...Qh3+ is met by 25.Kg1, and the threats remain.

- 24...Qe6 (prevents Qb3) 25.Qa4, and the threat becomes Qb4+

I'm not seeing a good way out for black.


I see that white opted to play 24.Qb3+ first, which is also good (in fact better). But a wiseguy once said "if you find a good move, stick with it!".

Aug-31-16  crwynn: 19...qg4 looks like black's mistake; he seems to have thought it was one of those 0-0-0 Dragon lines where "white" has to race "black" to mate. Instead he should have shored up everything on the c-file & only then started to attack; 19...rc8 seems reasonable. In that line i don't see any point to having a3 in, so white has just made a dodgy exchange sac from the black side of the dragon, in effect.
Aug-31-16  stacase: Way too easy for a Wednesday. Every move was obvious.
Aug-31-16  gofer: The start is simple...

<23 Nxc6+ ...>

23 ... Kc8/Kc7
24 Ne5+

23 ... bxc6
24 Qb3+ Kc8/Kc7 (Ka8 Bxc6#)
25 Rxc6+ Kd7
26 Qb7+ Ke8
27 Bg6+ Rf7
28 Qxf7#

<23 ... Ka8>
<24 Qa4 ...>

24 ... bxc6
25 Qxc6+ Kb8
26 Qc7#/Qb7#

<24 ... a6>
<25 Nxd8 ...>

click for larger view

White threatens Qxa6+ mating and there seems to be no good reply for black...

25 ... Rxd8 (and most other moves)
26 Qxa6+ Kb8
27 Qxb7#

25 ... Rf7
26 Nxf7

25 ... Qe6
26 Nxe6

25 ... Qc8
26 Rxc8+

25 ... Qd7
26 Qxd7

<25 ... Qxe4>
<26 dxe4 Rxd8>
<27 hxg5 >

click for larger view

Black is deader than dead...

Aug-31-16  ventricule: I missed the very nice 24. Qa4 idea, which I think is the main reason this is a Wednesday puzzle
Aug-31-16  leRevenant: An easy Wednesday POTD but I'm not whinging, au contraire...
Aug-31-16  Razgriz: Was thinking of pinning the pawn first with Qb3 but that was just plain unnecessary
Aug-31-16  zb2cr: 23. Nxc6+ does it.
Premium Chessgames Member
  thegoodanarchist: I got the first three moves, but only after considering 23. Na6+ first. So my chess intuition was right about the rank, but not the file :(
Aug-31-16  YetAnotherAmateur: 23. Nxc6+ jumped out, because white has 3 pieces aimed at it.

Accepting the sac is a bad idea:
23. ... bxc6
24. Qb3+ Kc7/Kc8 (Ka8? 25. Bxc6#)
25. Rxc6+ Kd7
26. Qb7+ Ke8
27. Bg6+ Rf7
28. Qxf7#

Refusing it doesn't help much though:
A) 23. ... Ka8
24. Nxd8 Rxd8
25. Qb3 and either Qxb7# or Rc8# follows.

B) 23. ... Kc7/Kc8
24. Nxa7+ Kb8
25. Nb5

Premium Chessgames Member
  gawain: Like <lost in space> I just went for the most tempting (and most forcing) move 23 Nxc6+ --after which everything else falls into place.
Premium Chessgames Member
  beenthere240: After 24...Kc7 I had to ponder. Both Rx and Bxc6 look strong. I didn't think the choice was "obvious"
Premium Chessgames Member
  drollere: this one seemed easy to find (if drawn out) ... once i took my attention off black's Qh3+.

23. Nxc6+ bxc6
24. Qb3+ Kc8 (Ka8, Bxc6#)
25. Rxc6+ Kd7
26. Qb7+ Ke8
27. Bg6+ Rf7
28. Qxf7#


Aug-31-16  JimNorCal: Agree that NBZ made an excellent contribution!
Premium Chessgames Member
  kevin86: White needed a sac to break the opponent's game open!
Aug-31-16  poachedeggs: It's amazing how an exchange of a minor piece for a pawn can activate an attack that is indefensible...
Premium Chessgames Member
  whiteshark: capric acid
Aug-31-16  MaczynskiPratten: 23 Nxc6+ is clearly the first move, but would suggest that anyone who missed 23...Ka8 24 Qa4 hasn't fully solved the puzzle ...
Aug-31-16  patzer2: Entertaining game by the then 15-year-old Italian Master Guido Caprio:

<1. a3> The Anderssen Opening is seldom seen in Master play as theory indicates Black equalizes too easily. However, it was successful against the strongest player in the world in it's debut in Anderssen vs Morphy, 1858 and is occasionally trotted out in blitz games by some of the top players in the world.

<1...e5> This is the most popular reply in the Opening Explorer. Other good replies includes 1...d4 as in I A Nataf vs R Wojtaszek, 2014, 1...g6 as in Velimirovic vs Timman, 1978, 1...c5 as in E Ambrus vs Balashov, 2001 and 1...Nf6 as in Carlsen vs Ivanchuk, 2010

<2. c4> White goes for a reverse Sicilian hoping the extra tempo with 1. a3 will prove useful.

<2...Nf6> Black accepts White's invitation to play a reverse Sicilian.

<3. d3> More popular are 3. Nc3 as in Carlsen vs Eljanov, 2010 and 3. e3 as in Nakamura vs Wang Hao, 2013.

<3...d5> An alternative is 3. ..Nc6 as in Pandix vs Rybka, 2009

<4. cxd5 Nxd5 5. Nf3 Nc6 6. g3> It's looking like a reverse Sicilian Dragon with White having an extra tempo.

<6...f6> Also good is 6...Be7 as in T Kabos vs H van der Poel, 2009

<7. Bg2> The game appears to leave the opening book as this is the only contest in the opening explorer with this move.

<7...Be6 8. Nc3 Qd7 9. O-O O-O-O> Black has completed development and fully equalized.

<10. Bd2 h5> Here I prefer the computers suggestion 10...g5 (-0.58 @ 26 depth, Stockfish 080716) with good attacking chances for Black.

<11. h4 Bh3> This allows White full equality. Better might be the computer pick 11...Nxc3 = to .

<12. Nxe5 !?> With this bold sacrifice White exchanges his Rook for a Bishop plus a Pawn and a bit of an initiative.

<12...fxe5 13. Bxd5 Bxf1 14. Qxf1 Kb8> Here the computers prefer 14... Nd4 15. Bc4 Kb8 =.

<15. Be4 Nd4 16. Qd1 Be7 17. Nd5 Bf6 18. Rc1 c6 19. Nb4 Qg4 20. Kf1 Rhf8 21. Be3 g5?> This is the losing move. Instead, 21...Qh3+ 22. Bg2 Qe6 = keeps it level.

<22. Bxd4> (+7.00 @ 20 depth, Stockfish 7) White is clearly winning.

<22...exd4> If 22... Rxd4, then 23. Nxc6+ bxc6 24. Qb3+ Kc7 25. Rxc6+ Kd8 26. Qb8+ Ke7 27. Qxa7+ Rd7 28. Qc5+ Kf7 29. Rxf6+ Kxf6 30. Qxf8+ (+5.78 @ 20 depth, Deep Fritz 15).

<23. Nxc6+ bxc6 24. Qb3+ Kc7 25. Rxc6+ Kd7 26. Qb7+ Ke8 27. Bg6+> Black resigns in lieu of 27...Rf7 28. Qxf7# 1-0

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