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FIBChess (Computer) vs Falcon (Computer)
World Computer Chess Championship (2004), Ramat-Gan ISR, rd 1, Jul-04
Van Geet (Dunst) Opening: General (A00)  ·  0-1



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Given 7 times; par: 47 [what's this?]

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sac: 16...Bxg3 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Aug-15-14  thickhead: If 23.Qd6 (to prevent 23.... Qg3+)Rh4+ 24.Bh3 Qf2+ 25.Kh1 Bf3#
Aug-15-14  greenfield67: Well, I'd have played 18...Ng4. Interested to see what silicon makes of this.
Premium Chessgames Member
  al wazir: Is there anything wrong with my 18...Ng4 ? If 19. Rd3 (to block the a5--f1 diagonal), then 19...Qf2+ 20. Kh1 Qe1+ 22. Bf1 Qxf1#. If 19. Ne2, then 19...Qf2+ 20. Kh1 Bxe2 21. Qf4 Qh4+ 22. Kg1 Bxd1, and black is up a ♖ and two ♙s. 19. Nb5 Bxb5 20. c4 Bxc4 doesn't help white. The best I can see for white is 19. Qxg4 Qxg4, leaving black with ♕+♙+♙ vs. ♗+♘.
Aug-15-14  Lighthorse: <greenfield67: Well, I'd have played 18...Ng4>

I was thinking the same thing, but it looks like 19.Qf4 saves white

Premium Chessgames Member
  al wazir: <Lighthorse: 19.Qf4 saves white>. Oh, of course.
Aug-15-14  patzer2: If 20. Qd2, then 20...Rh4! wins as play might continue 21. Qe1 (21. Qf2 Qh2#) 21... Qh2+ 22. Kf2 Rh6 23. Qh1 Rf6+ 24. Ke1 Qg3+ 25. Kd2 d4 26. c4 Rf2+ 27. Kd3 Rd8 28. Ke4 Qg6+ 29. Ke5 Qe6#.

In the final position, the threat ...Qg3+ followed by ....Qxg2# forces resignation.

Aug-15-14  Nick46: I thought computers never resigned. ??????
Premium Chessgames Member
  Once: This puzzle is cleverer than it looks.

At first I thought it was easy-peasy. The bishop sac for two pawns seemed to be the most obvious thing in the world. Then 18... Ne4 to funnel more black pieces into the attack whether white swaps knights or not. Two pawns for the bish seems a fair trade when you are having this much fun.

I was about to kibitz muttering that computers must have been pretty dumb back in 2004 to allow this sort of carnage. White seemed to make several obvious mistakes, such as accepting the sacrificed bishop and the na-na-na "you can't hurt me" of 20. Qc5.

But when I looked at it a bit more deeply with my mate Fritzie, there is a little more to it than first appears.

By the way, today Fritzie is resplendent in traditional lederhosen - leather shorts, knee high white socks, braces and a funny hat. I don't think he's going to a fancy dress party. He just likes the feel of leather against his skin. And I think he is hoping for some mutual thigh slapping and bier gedrinken with his pals Powerpoint and Excel.

The key move here is 18.... Ne4.

click for larger view

This does several things. As my buddy Lighthorse has said, it prevents white from sending international rescue to the kingside by Qf4. It also stops Qd2, at least for the time being. It freezes the e3 pawn in place, which makes the Bc8 very bad (and I don't mean in a Michael Jackson way).

Left to his own devices, black will now gang up on the white king with Qf2+ and Re6-h6 (or g6). The other rook can get into the action too via e8-e6-f6/g6/h6.

In fact, Fritz says that 18...Ne4 is the only move to preserve a whopping black advantage.

So white is probably forced to snap off the Ne4 with 19. Nxe4 Rxe4

click for larger view

Now white loses the plot with 20. Qc5. Instead, Fritzie wants to sacrifice his queen, but I want to know what happens after 20. Qd2 - trying to shore up the kingside.

Now it gets more complicated. According to Fritz, the only move that keeps black's advantage after 20. Qd2 is 20...Rh4. This prevents white from again evicting the black queen from the premises - this time with Qf2 - 20...Rh4 21. Qf2 Qh2#

All in all, a deceptive little puzzle. It looks simple, but there are at least two "only" moves to find - 18...Ne4 and a variation not played over the board, 20. Qd2 Rh4.

Must go. I can smell Skype cooking bratwurst.

Aug-15-14  gofer: Black's connected (and mobile) rooks and active bishops give black a significant advantage if the two sides start slugging it out. So that's what we need to do, pick a fight!

<16 ... Bxg3>

The threat is 17 ... Bxh2+ 18 Kh1 Qg3 where the white king has been stripped of defense and the white defense has to quickly re-organise itself.

17 hxg3 Qxg3+
18 Bg2 Ne4 (Kh1? Qxf3+ )
19 Nxe4 Rxe4
20 Qd2 Rh4
21 Qe1 Qh2+
22 Kf2 Rg4

So, in summary, the bishop is immune and white has to find a better response than 17 hxg3!

17 Ne2? Bxe2 18 Bxe2 Re4! Black deader than dead!

17 Re2? Be5 18 Qh4 Bxc3 19 bxc3 Qe5 20 Qd4 Qxe3+ 21 Qxe3 Rxe3 22 Kf2 Re5

17 Re2? Be5 18 Qa5 Bxc3 (18 Qb5 Rb8 (19 Qc5? Nd7 ) 19 Qa5) 19 bxc3 Rxe3

Anything else????


Hmmm, white took the bishop and died quite quickly...

Aug-15-14  morfishine: 16...Bxg3 17.hxg3 Qxg3+ 18.Bg2 Ne4 19.Nxe4 Rxe4


Aug-15-14  Santa Claus 77: How about "the Falcon has landed" as a pun? with respect to the Apollo 11 mission?
Aug-15-14  diagonalley: i was suckered into 18... N-N5 (instead of K5), having overlooked 19 Q-KB4... drat... & double drat
Aug-15-14  gofer: <Once>: Though <Powerpoint> and <Excel> are Fritz's pals they are more like Schadenfreuden.

Also they are a little concerned (even after many years) that Fritz is just a little too clever and just a little too organised and might try to take over everything and so have left lots of small forces (Paint, Notepad etc) littered all over Fritz's homeland, just in case he gets any invasive ideas...

<Skype> is only there, casually cooking the bratwurst, as a lookout, in case Fritz decides to go North...

Premium Chessgames Member
  Once: Alas, poor Fritzie, I think he is more afraid that I'm thinking about replacing him with stockfish.

And then I'll have to start doing fishy jokes.

I am convinced that they all have a party when I'm not at the computer. I know the Norton does cos I've seen it. The other programs must be better at hiding it.

Aug-15-14  dfcx: 16...? black to move. The first move is very clear
16...Bxg3 if 17.hxg3 Qxg3+ 18.Bg2 Ne4
19. Nxe4 Rxe4 followed by Rg4

if white does not take the Knight on 19, Qf2+ followed by Re6 will mate soon.

If white refuses the bishop, then it's at least one pawn down with bad positions.

Premium Chessgames Member
  Sally Simpson: Re: The Pun.

I don't suppose I'd get away with:

"What a Falcon Good Sacrifice.'
or 'Falcon Hell' or something along those lines.

Premium Chessgames Member
  beenthere240: 18....Ne4 not only threatens the king, but it also gums up white's mobility after the captures on e4.
Aug-15-14  Elian: I see the problems for a minute and go for 18...Ng4, which is the defense there? Black is threating the mate in h2, and I don't see a good defence for white
Aug-15-14  Jausch46: Once, I enjoyed Your utmost witty conribution. You cleared the main points and this with fine humour.
Aug-15-14  Conrad93: White's play is terrible even for 2002.
Aug-15-14  Refused: I feel for 16...Bxg3 17.hxg3 Qxg3+ (so far so good) 18.Bg2 Ng4?

I like a few other missed that Qf4 covers everything.

So I failed this friday's puzzle.

Aug-15-14  Crowaholic: "So I fibbed about being a dove…"

<Nick46> No true scotsman would ever resign either. Kidding aside, desktop chess programs have had the ability to offer their resignation for quite some time, though they typically don't resign unilaterally as a human player would. The xboard protocol allows for a chess engine to resign, though the UCI protocol seems to lack such a feature. It is also possible that the computer's operator was allowed to make that decision, that FIBChess was disqualified for some reason, or quite profanely, that the program just ran out of time.

Premium Chessgames Member
  agb2002: The material is identical.

The obvious move is 16... Bxg3 17.hxg3 (else White loses a pawn without compensation) 17... Qxg3+

A) 18.Bg2 Ne4 (18... Ng4 19.Qf4)

A.1) 19.Nxe4 Rxe4

A.1.a) 20.Qd2 Rh4

A.1.a.i) 21.Qf2 Qh2#.

A.1.a.ii) 21.Qe1 Qh2+ 22.Kf2 Rg4 23.Qh1 (23.Qg1 Qg3#) 23... Qg3+ 24.Kg1 Rh4 traps the queen.

A.1.a.iii) 21.Rf1 Qh2+ 22.Kf2 Rg4 23.Ke1 (23.Rg1 Qg3#) 23... Rxg2 wins.

A.1.b) 20.Qc5 Rg4 21.Rd2 Qe1+ 22.Kh2 Rh4+ 23.Bh3 Bc8 24.Bd2 (24.Qxc6 Rxh3+ 25.Kg2 Rg3+ 26.Kh2 Qg1#) 24... Rxh3+ 25.Kg2 Rg3+ 26.Kh2 Qf2+ 27.Kh1 Qg2#.

A.2) 19.Rf1 Bxf1 wins (20.Kxf1 Qf2#; 20.Nxe4 Qxg2#; 20.Qd2 Nxd2).

A.3) 19.Bd2 Qf2+ followed by 20... Re6 looks winning.

A.4) 19.Rd2 Qe1+ 20.Kh2 Re6 as in A.3.

B) 18.Kh1 Qxf3+ 19.Kg1 (19.Kh2 Ng4+ wins the queen to avoid mate) 19... Qg3+ 20.Kh1 Ng4 wins.

Premium Chessgames Member
  kevin86: Black's attack begins with a sac of a bishop for two pawns...and the end comes soon.
Premium Chessgames Member
  perfidious: FIBbers do not survive overlong at the chessboard when facing the rage of El Halcon. White's developed pieces were far away from its monarch and retribution was swift and sure, as the enemy swooped in on its prey.
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