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Craig van Tilbury vs Alonso Zapata
"Zap Rooter Film" (game of the day Nov-22-2006)
Radio Rebelde (1980), Havana CUB, rd 8, Feb-16
King's Indian Defense: Averbakh Variation. Geller Defense (E73)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Aug-29-10  echever7: Looks pretty obvious 22-Nf7 Kg7 23.Qh6 Kxf7 24.Qxh7 and

a)924..Kf8 25.Nxg6#

b)24....Bg7 25.Qxg6+ Kf8 26-Qxe6 1-0

c)24....N6g7 25.Qxg6 Kxe7 26.Bxf6 Kf8 and after, let say, 27.Bg5 white have a winning position (ideas as Rd3-f3, or Bh6-Bh5 or h4-h5-h6 or even f4!? seems than give an easy win. You can't even of "material advantage for black". Those three king' side pawns are worth more than those black pieces. Worse even for black 26...Nxf6 27-Qxg7 and 28-Qxf6 1-0 If Black play 24...N8g7 is even easier for white 25.Qxg6+ 26.Bxf6 and again those plans exposed in point c) win.

Aug-29-10  echever7: It's sad to see my fellow Zapata being destroyed in such a way ;)
Aug-29-10  homersheineken: How far down the progression do you have to get for this to be solved? I got the first 8 moves ... is that enough?
Aug-29-10  echever7: Oh! That's true! <VicentL> after Bg7 Qg8# I forgot that the "f6" bishop is not there anymore :) But you're wrong. black can't come back again. There are a lot of winning continuations for white.
Aug-29-10
Premium Chessgames Member
  Jimfromprovidence: It's amazing that the first 9 moves of the puzzle by white are all checks.

I thought that black might be able to defend with 31...Rf7?!, hoping to exchange rooks and also creating an escape square for the king on d7.


click for larger view

One way that line loses is by 32 fxe5 Rxf1+ Rxf1 Kd7 34 Qh6! (threatening Qxd6#).


click for larger view

Now 34...Qc7 is forced and 35 Rf7+ wraps it up for white.

Aug-29-10
Premium Chessgames Member
  sethoflagos: <<Jimfromprovidence:
I thought that black might be able to defend with 31...Rf7?!>

He might have done better with 30..Kf8 giving him a chance to get Rg7 in.

Aug-29-10  CHESSTTCAMPS: In this middlegame position, material is even, but white has a clear initiative on the kingside and black's Rb8 and Bc8 are not developed. This argues against any tension releasing exchanges such 22.Bxf6+? Nxf6 23.Nd5. White must attack! For some reason, I started looking at 22.f4(??), but within about 10 minutes, I realized that white has something much more straightforward and forcing:

22.Nf7+! Kg7 23.Qh6+!

I believe that many experts and masters would intuit that bringing the queen in with check is easily worth a piece in this situation. Concrete analysis firmly establishes that black's defensive minor piece cluster does not hold together well.

23... Kxf7 24.Qxh7+

So far, everything has been forced, and now black has 4 legal responses, three of which are quickly disposed of:

A) 24... Kf8?? 25.Nxg6#

B) 24... Bg7?? 25.Qxg6+ Kf8 26.Qxe6 Rxe7 (otherwise 27.Nxg6# or 27.Qg8#) 27.Bxe7#

C) 24... N8g7 25.Qxg6+ Kxe7 26.Qxf6+ Ke8 27.Bh5+! Nxh5 28.Qxe6+ Kf8 29.Qf5+ followed by Qxh5 and white's two-pawn lead combined with the badly exposed black king adds up to easy victory.

D) 24... N6g7 25.Qxg6+ Kxe7 26.Bxf6+ Nxf6 27.Qxg7+ Ke6 28.Qg6

White threatens both 29.f4 and 29.Bg4+ Ke7 30.Qg7+ winning the piece back with a winning attack.

D.1) 28... Qd8 29.Bg4+! (f4? Qg8 gives black more life) Ke7 30.Qg7+ Ke8 31.Bxe7+ Nxe7 (Bxe7 32.Rxd6 Nxe4 33.Rh6! wins immediately) 32.Rxd6 Qe7 33.Qg6+ Qf7 34.Re6+ Kf8 35.Qh6+ Qg7 36.Re8+ Kf7 37.Re7+ wins the queen.

D.2) 28... Rf7 29.Rxd6+! (29.Bg4+ Ke7 30.Bh5 Be6) Kxd6 30.Qxf7 Nd7 31.Rd1+ Kc7 32.Qe7 Qb6 33.Bg4 Qc6 34.Bxd7 Bxd7 35.Qxe5+ Kc8 36.Rd6 Qc7 37.f4 and white should win easily with black's Rb8 still out of play.

There are other promising lines in D.2 and I've likely missed the best.

Mark Diesen, Richard Delaune, and Craig Van Tilbury were all prominent up-and-coming players in the Washington D.C. area in the late 1970's and all are gone now.

Aug-29-10  scormus: <Craigokat> unbelievably brilliant attacking. If there was any justice in Chess, that game alone would merit a GM norm. At least the experience was chess and not boxing.

<CG> great Sunday puzzle. It's that 31 f4 that's so hard to find, OK I'd given up long before. I decided after finding the first 4 moves I was nowhere near. Right both ways, they were correct and I wasnt anywhere near.

Aug-29-10  CHESSTTCAMPS: <sethoflagos:> I agree with your preference for 29.Qg6 and I won this position (that you diagrammed) easily against Crafty, which started down line D.1 in my analysis.
Aug-29-10
Premium Chessgames Member
  chrisowen: <Craigokat> A tap as rÍver pit again faction 21..Bf6 revolutions eaten Nf7+. Dead doored white rattles king, nice key revisited h6 oracle handle monarchs dead brain alive in a vat.

Not too taxing cart horses wrecked angle queen's lawnmower approach blood and mud. It was brill fishing little dips over more jailing king. Keepsake pawn zaggin f4xe5 fool not Alonso, mate deliver a jaffa Nf7 won. Shrinking embank the pawns lust to expand.

Aug-29-10
Premium Chessgames Member
  Jimfromprovidence: <sethoflagos> <He might have done better with 30..Kf8 giving him a chance to get Rg7 in>

OK, but it's still over by then, right, after 31 Qf6+?


click for larger view

This move threatens if 32..Rf7, 33 Qxd6+, winning the other rook.

Or, if 31...Kg8, then 32 Rxd6 seeing 32...Rxd6 33 Qxd6, below. (now threatening the b rook and also 34 f4, if 33..Ra8).


click for larger view

Aug-29-10
Premium Chessgames Member
  WinKing: My hats of to Van Tilbury. 31.f4 is truly a gem of a move! A very nice sequence of moves to bring home the point.
Aug-29-10  EXIDE: Too many pieces on the board. Tried to find the best move, not even close. To get thru an analysis would take so much time, I wonder how the players do it.
Aug-29-10  vijaymathslpjz: lol...after 27..Ng7 i just wasnt sure....
but essentially i thot there might be an advantage...
Aug-29-10  BwanaVa: Chessttcamps, you can also include Don Barr, the Va state champ in 1978 and 1979 who was killed in a car accident ~ 1983. he adn Delaune were on the way to an event in West Virginia. Obviously, Delaune survived until his own untimely passing in 2004 at the age of 49.
Aug-29-10
Premium Chessgames Member
  sethoflagos: <<CHESSTTCAMPS>: sethoflagos: I agree with your preference for 29.Qg6 and I won this position (that you diagrammed) easily against Crafty, which started down line D.1 in my analysis.>

I was put off 29 Bg4+ (equivalent to move 28 in game) for fear of 29..Nxg4 30 Qxg4+ Ke7 31 Qg5+ Kf8 32 Rg7 with possible Bxh3 to come. An unfounded fear as <Jimfromprovidence:> points out but I don't think Kibitzers should worry about finding the game line beyond 28 - it isn't best play after that.

BTW 22 b4 may not have been on the money, but 21 b4 would have been a clear win so it wasn't quite as daft a line as I thought.

Aug-29-10
Premium Chessgames Member
  Jimfromprovidence: It saddens me to see anyone taken at such a relatively young age, particularly due to coronary issues.

I'm very passionate about the issue of heart health since I have atherosclerosis and underwent a life-saving angioplasty procedure at age 53, about 5 years ago.

Since my procedure, I have accumulated both factual as well as personal anecdotal knowledge that I am willing to share concerning coronary artery disease and how living with it has affected my family and me.

I would be happy to discuss this issue on my forum page or in a more private manner if desired.

Aug-29-10  CHESSTTCAMPS: <BwanaVa: Chessttcamps, you can also include Don Barr,...> Thanks for covering the omission. I knew Diesen and Delaune better, meeting both in tournament play. I had a very lucky draw in one encounter with Diesen in the 80's and went 0-2 against Delaune, although the last loss should have been a win. Both were good guys and took the time to do thoughtful postgame analysis.

<sethoflagos:> My bad - I looked at your diagram and I didn't notice that you had reached a similar (but not identical) position by a different path.

<Jimfromprovidence:> I'm glad you dodged the bullet.

Aug-29-10  David2009: <Jimfromprovidence: <sethoflagos> <He might have done better with 30..Kf8 giving him a chance to get Rg7 in> OK, but it's still over by then, right, after 31 Qf6+?>

Crafty prefers 30...Kf8 to 30...Ke8 as played in the game. This is the position with White to play after 30...Kf8


click for larger view

As <sethoflagos> points out, White has to be careful e.g. 31 f4 (the idea from the game) Rg7 32 fxe5+ is weak: 32...Kg8 33 Qh6 (guarding h3) dxe5 34 Rd6 Qc7 35 Rdf6 Bxh3!? 36 Qxh3 Qd7. Black now threatens Qd4+, so White exchanges queens: 37 Qxd7 Rxd7. Black will now play Rd4 at an appropriate moment, with very good drawing chances through control of the key open file.

However there appear to be several ways to win. One is <Jim>'s <31 Qf6+>. Another (which I discovered before reading Jim's post) is 31.f4 Rg7 32.Qh6 (much better than fxe5). Crafty defends with 32...Kg8 and now 33.f5 locks the Bishop out. This wins against Crafty, but of course Black's moves may not be best (Crafty drifts into an uncharacteristically passive position). The line continues 32... Rh7 34.Qg6+ Rg7 35.Qe8+ Kh7 36.Qh5+ Kg8 37.f6 Qc7!? 38.fxg7 Qxg7 39.Qe8+ Kh7 40.Rf8 (White is motoring) Bg4 41.Qxb8 Bxd1 42.Qxd6 Be2 43.Re8 Bxc4 44.Re7 Bf7 45.Rxb7 Kg8 46.Qd8+ Qf8 47.Qxf8+ 1-0

Crafty link to the position after 30...Kf8 as in the diagram above: http://www.chessvideos.tv/endgame-t...

I came back to this game after a break of over half a day and am catching up with the kibitzes. <CHESSTTCAMPS> finds yet another path to victory, with 28 Qg6 in place of 28 Bg4+.

Aug-29-10  wals: Black: first hairline fracture-

(+1.18):13...Nf8.

Better was,
Analysis by Rybka 4 x64: depth 21:

1. (0.72): 13...Ne5 14.Nxe5 dxe5 15.Rd3 Rd7 16.Rfd1 Rd4 17.Bg3 Qd6 18.Bf3 Bd7

Black: the fracture widens,

(+1.74):18...Ne8.

Better was, (depth 26):

1. (1.12): 18...Qd8 19.Nxf6+ Bxf6 20.Bxf6 Qxf6 21.Bg4 Rd8 22.Nd5 Qf7 23.Nb6 Nd4 24.Nxc8 Rdxc8 25.Bxc8 Rxc8 26.Qd3 Kg7 27.f3 b5 28.b3 Rf8 29.Rf2 h6 30.Rdf1 g5 31.Rd1 Rb8 32.Rfd2 b4 33.Rb1 Qc7 or 2. (1.16): 18...Nxg4 19.Bxg4 Rf7 20.Nd5 Qd7 21.Nb6 Qc7[] 22.Nxc8 Nd4[] 23.Qd2 Bf6 24.Bg3 Bg7 25.f3 Rxc8 26.Bxc8 Qxc8 27.b3 b5 28.Bh4 Qe6 29.Rc1 Bf6 30.Bf2 Rf8 31.Be3 Re8 32.Qd3 Qd7 33.Rcd1

Black, and widens,

(+2.40):19...Qa5.
Better was, (depth 21);-

1. (1.82): 19...Qc6 20.Nh6+ Kh8 21.Bg4 Rc7 22.b3 Nf4 23.Nxc7 Bxg4 24.hxg4 Qxc7 25.g5 b5 26.cxb5 axb5 27.Bg3 Ne6

White, gives some relief:-
(+1.27):21.Ne7.
Better was, (depth 18):-

1. (2.29): 21.Bg4 N6c7 22.Bxd7 Nxd5 23.Rxd5 Bxd7[] 24.Nf7+ Kg8 25.Nxd6[]

Black opens the crevice wider:-
(+5.03)21...Bf6.
Better was, (depth 21):-

1. (1.29): 21...Rxe7 22.Bxe7 Qc7 23.Bh4 b5 24.b3 Bd7 25.Qd2 Nd4 26.Ng4 Qb7 27.Bd3 h5 28.Ne3 Bxh3 29.f4 exf4 30.Nd5 Bg4 31.Nxf4 bxc4 32.Nxg6+ Kh7 33.bxc4 Bxd1 34.Qxd1 Kxg6 35.e5+

Black, a gaping hole occured:-
(+15.68):27...Ke6.

Although up a Knight for two pawns at this stage Black had no hope of climbing out of the pit he had dug himself and cried enough move 34.

Aug-29-10  FlashinthePan: I found the moves up to 28...Nxg4, but then I had 29.Rxd6+ (I thought the first moves were too easy for a Sunday, and a brilliancy of some sort had to follow) sacrificing the rook with the threat of 29...Rd7xd6 30.f4, and now the threat of 31.f5# compels Black to play 30...e5xf4, with 31.Rxf4 and a likely mate in a few moves. I don't have a chess program or even a chess set at hand, so could someone please confirm if that variation is correct?
Aug-30-10  tacticalmonster: 1 Nf7+ Kg7 2 Qh6+ Kxf7 3 Qxh7+ and now:

a) 3...Kf8 4 Nxg6 mate

b) 3...Bg7 4 Qxg6+ Kf8 5 Qxe6 Nf6 6 Ng6 mate

c) 3...N6g7 4 Qxg6+ Kxe7 5 Bxf6+ Nxf6 6 Qxg7+ Ke6 7 Qg6 Ke7 8 f4!

d) 3...N8g7 4 Qxg6+ Kxe7 5 Qxf6+ Ke8 6 Bh5+! Nxh5 7 Qxe6+ Kf8 8 Rxd6 Qc7 9 Qh6+ Ng7 10 Qh8+ Kf7 11 Rf6+ Ke7 12 Qf8#

Aug-30-10
Premium Chessgames Member
  patzer2: For yesterday's difficult Sunday puzzle solution, 22. Nf7+!!, in addition to being a tribute to the recent passing of 53 year old Craig Van Tilbury, is essentially a deep delayed demolition combination, which envisions the sacrifice of a piece to demolish the Black King's pawn cover and pursue the helpless monarch for a mating attack.

The weak position of Black's major pieces, crowded mostly on the Queen side, makes the attack on the under protected King possible, when after having gained only two pawns for the piece the eventual 31. f4! prepares to bring White's Rooks into play with decisive effect.

The winning moves have been well analyzed in the previous posts, so I'll examine a few other possibilities not mentioned.

The previous move 21. Ne7! may have anticipated this deep attack, since White could have won the exchange with the simple pinning maneuver 21. Bg4! Nd4 22. Bxd7 Bxd7 23. a3 to . I don't know if Craig overlooked this possibility. However, as a tribute to this great player and this brilliant game I'd like to think he avoided such simple immediate gratification because he envisioned a much stronger possibility some 10 moves or more ahead.

Although the deep 22. Nf7+!! is the most forcing winning possibility, White may have two other winning possibilities with 22. Bxf6+ or 22. Nxc8.

One possibility I explored on a move-by-move look with Fritz is 22. Bxf6+ Nxf6 23. Nd5 Nxd5 24. cxd5 Nd4 25. Bg4 Rc7 26. f4 Bxg4 27. Nxg4 exf4 28. Rxf4 Qb5 29. Rf2 Qe8 30. Rdf1 Qd8 31. Nh6 Kg7 32. Nf7 Qe7 33. e5! .

However, this line is far less forcing and probably leaves room for some improvements by Black. So Craig's brilliant 22. Nf7+!! is surely the strongest winning idea!

Aug-30-10  gofer: Okay, a little later than advertised...

22 Nf7+ Kf7
23 Qh6+ Kxf7
24 Qxh7 ...

Option 1

24 ... Bf7 25 Qg8#

Option 2

24 ... N8g7
25 Qxg6+ ...

25 ... Kxe7
26 Qxf6+ Ke8
27 Bh5+ Nxh5
28 Qxe6+ Kf8
29 Rxe6 Qc7 (29 ... Rxe6 30 Qxe6+ winning Rb8 AND Bc8!) 30 Qh6+ Kg8 (30 ... Rg7 31 Rd8+ Kf7 32 Qxh5+ Rg6 33 Qf3+ Kg7 34 Qf8+ Kh7 35 Qh8#) 31 Rxd7 Qxd7
32 Qxh5 winning white is three pawns up with very strong chances!

25 ... Kf8
26 Qxf6+ Ke8
27 Bh5+ Nxh5 (Kd8 28 Nd5+ Re7 29 Qxe7#)
28 Qxe5 and mate in 3 more

Option 3

24 ... N6g7
25 Qxg6+ ...

25 ... Kf8
26 Bxf6 Rxe7
27 f4! winning!

25 ... Kxe7
26 Bxf6+ Nxf6 (Kf8 27 f4 winning!)
27 Qxg7+ Ke5
28 Bg4+ Nxg4
29 Qxg4+ probably winning with f4 coming soon...

Time to check...

Aug-30-10  gofer: <David2009> crafty doesn't like this continuation after 30 ... Kg8

31 Qh6+ Kg8
32 Qe6+ Kh7+
33 Rxd6! Rg7(?)
34 Qxe5! Be6(??) trying to block the threat of Qh5+ Kg8 Rh6 Qc7 Qe8# 35 Rxe6 ...

At which point white is 4 passed up... game over... :-)

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