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Milenko Sibarevic vs Enver Bukic
Banja Luka (1976), Banja Luka YUG, rd 9, Dec-??
Sicilian Defense: Najdorf Variation (B96)  ·  1-0



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Kibitzer's Corner
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Jan-18-07  LoveThatJoker: I got this puzzle. 17. Rxe5! I was seeing the line 17...dxe5 18. Nf6+! Nxf6 19. Rd8#

The tougher defense is of course the text. I wasn't expecting Black to play 17...Be7+ to be honest. However, before seeing 18. Rxe7+ actually played on the board, I did choose it.

And upon seeing Black's last move of 20...Rh7, I instantly saw 21. Re8+! Kxe8 22. Qd8#


Premium Chessgames Member
  An Englishman: Good Evening: Got it. Once you spot the mating pattern, it's a matter of how do you get three pieces (White Knight, Black pawn, Black Knight) out of the way with tempo. Remarkable what a few checks can do, isn't it?

I presume that the 20 games in the CG database will reveal why White didn't play 11.Ndxb5, which looks pretty reasonable to me.

Jan-18-07  whatthefat: <Random Visitor>, <The beginner>

11...Bb7 was indeed White's improvement in F Hellers vs Igor Ivanov, 1992 where Black went on to win.

Jan-18-07  dzechiel: Took me about three minutes of looking at 17 Rxe5+ to make it work. I spent a great deal of time trying to make Qxd7+ work in many different variations (mostly because it was a forcing move in that black had to reapture with the king), but it just wouldn't go.

Finally I looked for a different approach and spotted 17 Rxe5+ dxe5 18 Nf6+ Nxf6 19 Rd8#. That's when I knew my key move was right.

Black kind of spoils all this by refusing the rook and leaves the queen en prise, then resigns (probably in disgust).

Premium Chessgames Member
  An Englishman: Good Evening: Certainly A Vitolinsh vs L Gutman, 1973 makes 11.Ndxb5 look awfully good.
Jan-18-07  ahmadov: Very nice indeed!
Jan-18-07  Xiddok: This one eluded me. Afterwards it still took a minute to see what prevented 17... dxe5. I finally found the 18. Nd6+ Nxf6 19 Rd8# line, with a checkmate that was similar to the one that was inevitable with the line that actually was played.
Jan-18-07  goldfarbdj: Got it fairly quickly. For some reason I often seem to have an easier time on Thursday than on Wednesday or sometimes even Tuesday.

Here I saw that the knights were covering all the squares and that Nf6 would be mate if not for the knight on d7; so I looked at Qxd7+, but it seemed pretty apparent that after Kxd7 there was no followup. Then I tried Nf6+ followed by Rxe5+; it didn't take long to decide that the Rxe5+ was stronger.

I thought that white was going to play 19. Nd8, which I think would have been an elegant move, but 19. Qf5 is probably stronger.

Jan-18-07  ianD: did not get it today :-(

I looked hard at Qxd7 but that didn't work.
I suspected Rxe5+ was the solution but after that I got lost and could not find the win. I would not have had the courage to play this move OTB.

Alas 3/4 this week. The other three were easy.

Jan-18-07  Tactic101: Got this one. I also considered Qxd7, but when that didn't work out, I quickly turned my attention to Rxe5. It is easy once you see the fact that the knights cover the flight squares of the black king well and that they can deliver mate had it not been for the black knight. So, if after Rxe5+!!, Nxe5, Nf6 is mate and after dxe5, Nf6+!, Nxf6 Rd8 is also mate. I also got Qf5 and Qf6, but these are more natural moves, rather than moves that need calculation. A pretty neat puzzle. 4/4 for the week! :)
Jan-18-07  greensfield: Started out with the four forcing candidate moves:-
17. Qxd7+, Nf6+, Nc7+, Rxe5+.

Thought I'd cracked it with the first one
17. Qxd7+ then
17...Bxd7 18. Nf6# (17...Qxd7 18...Nf6#)
but (17...Kxd7 drat)

Soon rejected next two 17. Nf6+ Nxf6 and 17. Nc7+ Qxc7 as Black has winning advantage

Last one Eureka!!
After 17. Rxe5+ black has 3 options
(a) 17...dxe5 18. Nf6+ Nxf6 19. Rd8#
(b) 17...Nxe5 18. Nf6#
(c) 17...Be7 18. Rxe7+ Kf8 19. Qf5<(threat Qxf7#)> Ne5 20. Qf6<threat Qxh8#> Rh7 21. Re8+ Kxe8 23. Qd8#

Jan-18-07  rochade18: Strike!
Jan-18-07  Snaeulf: got it quite quickly
Jan-18-07  tatarch: Thank you whatthefat
Jan-18-07  medjutim: Another one from the games where player plays his move and resigns.. Nevertheless, an easy one again.. Funny thing, I wasn't sure for some time, because I didn't see that after 17...Nxe5 18. Nf6# black has no place to move his king :)
Premium Chessgames Member
  keypusher: Wow, how pretty!
Premium Chessgames Member
  kevin86: It's funny,the knights certainly showed a lot here,but I missed what a little line-opening move or two really decided this one in a hurry!

Black resigned because of 21 ♖e8+ ♔xe8 22 ♕d8#. It's funny,or is it kismet,that in a few other variations ,mate comes at d8,albeit with another piece!

Jan-18-07  alphee: completely missed this one as I did not see 17: ... ♗e7 but just 17. ♖xe5+ dxe5 18. ♘f6+ ♘xf6 19. ♖d8# and that was too easy!
Jan-18-07  Fisheremon: <whatthefat: <tatarch>

The database has 20 games with 10.Bxb5, the two earliest being from 1973:

A Vitolinsh vs L Gutman, 1973
Tal vs M Stean, 1973

I'm not sure which of those came first. 11.e5 here appears to be a novelty though, with it being repeated in F Hellers vs Igor Ivanov, 1992 where Black won.> The similar idea with sac 10.Bxb5 was first met in Bronstein vs Najdorf, 1954

Premium Chessgames Member
  Peligroso Patzer: <tatarch: Maybe a premium member or opening guru can tell me actually--is 10. Bxb5 standard?>

IM Richard Palliser's book, Starting Out: Sicilian Najdorf, describes 10. Bxb5 as a "standard sacrifice for the initiative" (p. 173). The 10. Bxb5 line is the subject of illustrative game #44 in that book (pp.178-180).

Jan-18-07  TrueBlue: got it. But it was quite tricky. Rxe5 wasn't the first move I considered. I first tried fxe, but coudn't get enough advantage.
Jan-18-07  wasspwot: thanks for more superb computer analysis of the type that was so helpful in the Arno Nickel game.
Jan-18-07  simsan: I rather quickly saw the two mates that follow from 17.Rxe5+ dxe5 and 17. Rxe5+ Nxe5, and I realized two things: a) Rxe5 had to be the right move and
b) (with yesterday's puzzle in mind) There were other defences that made things more complicated.

I then saw that after 17. .. Be7 18. Rxe7+ Kf8 mate seemed a little more difficult.

Sadly I didn't really crack that challenge.

I settled for 19. Qc3 which (according to my computer) is only the third best move.

19. Qc3 is however clearly winning (toga: +16 after 13 ply): a) It directly threatens Qxh8#
b) It threatens Rde1 (doubling the rooks) followed by Re8# (to which black can basically only reply by moving his N loosing his Q to Rxb7) c) It protects the N at c6
d) It avoids a discovered threat to my Q from the bishop on c8

Black's position is in ruins, and he will go on to loose a lot of material including his Q or get mated within the next couple of moves.

Admittedly the text move is # in 5
.. and 19. Rxf7 is apparently # in 11 (which is probably obvious to some ppl :-) )

Jan-18-07  YouRang: I found it fairly quickly when I considered that Nf6+ would be mate if not for ...Nxf6. This means that I can *force* ...Nxf6 by playing Nf6+. Does that do me any good?

Not quite. However, I could then deliver the familiar N+R mate (Rd8#) if only the d6 pawn were out of the way. Can I get rid of the d6 pawn?

Yes! 17. Rxe5+! If 17...dxe5, I spring the trap: 18. Nf6+ Nxf6 19. Rd8#. (Of course, if 17...Nxe5, then I've deflected the knight allowing the immediate 18. Nf6#).

Of course, 17...dxe5 isn't forced, but his only other choice is to surrender a bishop: 17...Be7 18. Rxe7 Kf8, and now after 19. Qf6, white's attack is in full swing. I didn't see all the way to mate (which is just a couple of moves away as it turns out), but I could 'smell' it. :-)

Jan-19-07  Fisheremon: <RandomVisitor: Did White miss an earlier win at move 14:

(1.91): 14.Nxe6! fxe6 15.Rxe6+ Kd8 16.Rxf6 Nxf6 17.Bxf6+ Be7 18.Bxh8 b4 19.Nd5 Rxa2 20.Nxe7>
Right, but 20.Qe4 seems better. Here some comments: strikingly after 11...Qb8 Black's position was lost (poor Black didn't realize the nuance of the sac: 11...Qb8 just played in the case 11.Ndxb5, and perhaps 11.e5?! because of 11...Bb7, or 11...dxe5 12.Ndxb5 Qb7 13.fxe5 Rxa2 with equal chances).

After forced 12.exf6 gxf6 13.Rhe1 h5 White has a variety of ways to get advantage 14.Qh3, 14.Nxe6, 14.Ncxb5, 14.Nc6 the first two lead to a clear win. A comparison between them. In many variations 14.Qh3 leads to beautiful mate attacks, 14...e5 seems to be the best resistance (14...Be7 could be also, still with a lost endgame) 15.Nd5 fxg5? Black decided to take poisoned Bishop that led to the forced mate. Instead 15...Bg7 could avoid it, still losing. Conclusion: 14.Nxe6 is the best continuation for attack.

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