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John van der Wiel vs Gyula Sax
EUR-chT (Men) 8th (1983), Plovdiv BUL, rd 5, Jun-29
Sicilian Defense: Dragon Variation. Yugoslav Attack Modern Line (B76)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Feb-22-13  Rhialto: 22...Rf8 23.Rh7 Rf7 24.Rd8+ is perhaps what you're missing.
Feb-22-13
Premium Chessgames Member
  Gilmoy: 21.Rh6 was also a candidate. White's 1st R is expendable, Black's DSB isn't.

<BxChess: 22..Rf8> 23.Rh7 Rf7 (what else?) 24.Rdh1. Too many pins.

Feb-22-13  Bartimaeus: <gilmoy: <BxChess: 22..Rf8> 23.Rh7 Rf7 (what else?) 24.Rdh1. Too many pins.> Even better is 24.Rd8+ and its a mate in 2.
Feb-22-13  morfishine: Sicilian: material even; The most forcing capture move is 21.Bxg6

<21.Bxg6 fxg6 22.Qxg6> A position worth a look:


click for larger view

White's rooks are on open files while Black's DSB is pinned; I had a very hard time finding a reasonable defense for Black; At first, I thought 22...Ne8 giving the piece back was best; but after 23.Qxe6+ Kf8 24.Bxg7+ Kxg7 (24...Nxg7 25.Rh8 mate) 25.Rd5 and White wins

Then I "found" 22...Rb6, but this fails to 23.Rh7

Oh well, lets see how this played out

**********
PM: I never considered 22...Bf7 as a possible defense

Feb-22-13  eaglewing: Regarding "giving back the piece":
22...Bf5 23. Qxf5 Rb6 seems to "work" (Qg6 Ne8). With two pawns down and a shattered position for the king, so still decisive.
Feb-22-13
Premium Chessgames Member
  Oxspawn: I expect there will be a lot of talent displayed in this thread, so to add some variety I will lead you through the process of reaching a dead end in this position. My first thought is white's position is much worse than black's despite being even on material and black probably intends to play b4. So: 21. Resign
My second thought is "can I stop black playing b4". So 21. b4 but after Qd5, I don't like the look of my defences. I do notice however, that if black does play b4 I can play Ba6 so black may have to play Rb3 first.

Then I looked at a round the back assault on the black king down the h file, first with one rook and then with the other. But the bishop seems to control h8 and I cannot see a way to shift it off the diagonal. For a moment had hopes with

21. Qxf6 Bxf6
22. Bxf6 exf6

But the rooks still cannot work in tandem and anyway black would take with the pawn first, not the bishop. I also thought about trying to shift the black rook from the back rank and then attacking the king with my rook on d8. But short of swiping the rook when black was not looking, I could not see a way to do that. And anyway the bishop also guards f8.

So
21. b4 Qd5
22. Bxf6 Bxf6
23. Qxc5 Rxc5 (aha! Shifted the rook.)
24. Bxg6 fxg6
25. Rd8+ Kf7
I have run out of steam but suspect I have the germ of an idea here and my bishop move is wrong as it let black create space on f2. I am giving up and going to play through the game.

Just done thatů. Wow. Did he really see all that? Magnificent.

Feb-22-13
Premium Chessgames Member
  Oxspawn: Probably what I meant to say above was
21. Bxg6 and that's it!
Feb-22-13  Abdel Irada: The Yugoslav Attack: where both players "castle into it" on purpose.
Feb-22-13  mistreaver: 23... Ne8 (24... Qxe5 doesn't work because of 25 fxe5 Nxh7 26 Qxe6+ and Qxc8) 24 Rxg7+ and now
A11)
24...Kh8
25 Qh6 mate
A12)
24...Kf8
25 Rh7 and there is no defence against Rh8 mate for isntance 25... Bg8
26 Rh8 Nf6
27 Bxf6
A2)I think that the immediate b4 is far harder to refute: 21...b4
Perhaps now Ne4 could come into consideration
A21)22 Ne4 and now:
A211)
22... Nxe4
23 Bxf7 Kxf7
24 Qxg7+ Ke8
25 Rh8 Bg8
26 Rh8 mate
A212)
22 ... Qxc2+
23 Ka1 bxa3 iss too dangerous i would say, so Ne4 is not essential A22) after b4 what is the right move?
22 Bxf7+ perhaps playing with the same motiffs as in the A1 variation will bring benefit? A221)
22... Kxf7
23 Rh7 Nxh7
24 Qxg7+ Ke8
25 Qxh7 and i don't see a way to stop Qh8 with mate
A222)
22... Bxf7
23 Rh7 and black can resign.
A3)There is also the unsofisticated prophylaction:
21... Kf8
But i think that nevertheless
22 Bxf7 Bxf7
23 Rh7 and white should win.
Phew, that was some analysis. Hope that at least some part of it is correct. Time to check. ---
Okay, i failed to notice the best defence for black, my typical weakness.And also in my line A2) after 21...b4 22 Bxf7 gives dynamic balance, but 22 Rh7 is immediatelly decisive, as pointed out by rybka. Therefore only half a point for me today, making it poor 2.5/5 this week, with 2 hardest puzzles to come.
Feb-22-13  mistreaver: Hmm for some reason the first part of my post is missing, where i played 21 Bxg6 fxg6 22 Qxg6 b4 23 Rh7 with a win for white.
Feb-22-13
Premium Chessgames Member
  chrisowen: Yeah I've got it is your number!

play the butter finger in con gee elephant he at 22...bf7 toast in for 23.rh8+ do the math I on elect wrong bullshine,

in debatable of course 20.rb7 looses the dig it i 21.Bxg6 fg6 white fine fortuned,

having look it ok 22.qxg6 at good game thod in to 22.bf7 hack ward in got 23.rh8+ a length in curly it who would have thought it oh in f7?

go re f5 in tempt it fleece queen in away it off g-line,

find alive spark king grateful it ole um cain bishops bamboo shoot for home straight in glesson it slide in son 23.rh8+ wreck keep plugging away it is rig 23...Kxh8 rook aint it rise 24.qxf7 lower stitching up betters in belows the neddy it trapped in f6 going to h5 heffalump only postpones the inevitable duck in knight flu flubber,

choose vent h5 ills you white elephant sacrifice in feed 24...rg8 entombed flab band he advance in baggy it ok in garnering boat at acute 25.rh1+ or dervish in every 25.Bxf6 mate ghosts in for beings babushka,

h7 h5 in temple afore in head bishop e5 success have clean in go paltry 26.Qh5 bend a leap in glibs balls 25.Nh7 pony etc hastens belt across wash in building some gall h5 come on what about in before o a clip in dilemma tempted ate in bin rookb7 bifocals vindicate a mind to speculate diffuse lick knightg4 rook toy, bf7 ridge at f5, g8 rook h1 neighin h7 at h5 golden chest goofed.

Feb-22-13
Premium Chessgames Member
  DarthStapler: I didn't get it
Feb-22-13
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens ... b4.

The weakened black castle invites to play 22.Bxg6:

A) 22... fxg6 23.Qxg6 (with the idea 24.Rh7 Nxh7 25.Qxg7#)

A.1) 23... Bf7 24.Rh8+ Kxh8 25.Qxf7

A.1.a) 25... Qxe5 26.fxe5 Rf8 27.Rh1+ Nh7 28.Qg6 Kg8 29.Rxh7 Rf7 30.e6 wins.

A.1.b) 25... Nh5 26.Rh1 Qxe5 27.fxe5, etc.

A.2) 23... Rf8 24.Rh7 Rf7 25.Rd8+ and mate in two.

B) 22... b4 23.Rh7

B.1) 23... bxc3 24.Bxf7+ Kxf7 (24... Kf8 25.Qxg7#; 24... Kxh7 25.Rd1+ and mate in two) 25.Qxg7+ Ke8 26.Rh8+ B(N)g8 27.Rxg8+ N(B)xg8 28.Qxg8#.

B.2) 23... fxg6 24.Qxg6 Kf8 (24... Ne8 25.Rxg7+ wins) 25.Qxg7+ is similar to B.1.

B.3) 23... Rd7 24.Bxf7+ is similar to B.1.

B.4) 23... Qxe5 24.Bxf7+, etc.

Feb-22-13  Jack Kerouac: The Sax wasn't that good....
Feb-22-13
Premium Chessgames Member
  Jimfromprovidence: The real weakness with black at the puzzle position, below, is the overworked knight, but it's not obvious to see that.


click for larger view

When you look at the position without the g6 pawn present, the solution appears.


click for larger view

White has a forced mate beginning with Rh7, seeing ...Nxh7, then Qxg7+.

That's why 21 Bxg6 in the puzzle position is necessary as the first move in the combination, as after 22 Qxg6 in the text, below, you can now see that Rh7 threat.


click for larger view

Feb-22-13
Premium Chessgames Member
  ajk68: How does white stop 22...b4
Feb-22-13  snakebyt: I considered BxgPawn which I thought might allow the Queen to move in and threaten a Rook Queen headlock but the Bg guarding his King mucked up the works. So I chose 21 Ne4 which forks the blk Q and N. That looked great but fizzled out once I set up the board and played it out. Then I peeked.
Feb-22-13  morfishine: <ajk68> On your question: <How does white stop 22...b4> 23.Rh7
Feb-22-13
Premium Chessgames Member
  FSR: 21.Bxg6! seems extremely strong:

(a) 21...hxg6 22.Qxg6 threatens 23.Rh7! This looks crushing. (i) If 22...Kh8, 23.Rh7! Nxh7 24.Bxg7+ forces mate. (ii) If 22...Bf7, 23.Rh8+! Kxh8 24.Qxf7 (threatening 25.Rh1+ Nh7 26.Qxg7#) Rg8 25.Bxf6 and wins.

(b) 21...b4 22.Rh7! (i) 22...Nxh7 23.Bxh7+ Kf8 24.Qxg7+ Ke8 25.Qh8+ Bg8 26.Qxg8#; (ii) 22...fxg6 23.Qxg6 Ne8 24.Bxg7 1-0; (iii) 22...bxc3 23.Bxf7+ Kxf7 (23...Bxf7 24.Qxg7#; 23...Kxh7 24.Rh1+) 24.Qxg7+ Ke8 25.Rh8+ Bg8 26.Rxg8+ Nxg8 27.Qxg8#.

Feb-22-13
Premium Chessgames Member
  FSR: Gyula Sax

Not this time - unless you count his king.

Feb-22-13  SamAtoms1980: Actually picked my way through this one. 21.Bxg6 fxg6 22.Qxg6 is early-week stuff, with the benefit of giving White the threat of 23.Rh7 among other things.

After 22....Bf7, my next thought was, "23.Rh8+ is weird enough that it just might work." A closer look showed that it was not weird at all: after 23....Kxh8, the f7-bishop falls, and with Rh1+ and Qh5 coming up the hill, Black is out of luck.

Feb-22-13  Patriot: Material is even.

This is difficult to calculate because there are so many permutations. The best I see is 21.Bxg6:

21...fxg6 22.Qxg6 (threatening 23.Rh7, winning) Bf7 23.Rh8+ Kxh8 24.Qxf7 threatening 25.Rh1+

I'm out of time.

Feb-22-13  Checker2: I saw only the first couple of moves.

I also liked Rh6, seeing that if the bishop captured, black would get mated on h8. Curious, I ran 21 Rh6 Bxh6 through Fritz and mate can be avoided (in typical computer fashion) by giving up the queen on e5. Instead there are two adequate responses to Rh6 with near even evaluation first ... Ng4 22. Bxg7 Qxg5 and second ... b4! with a host of mating chances for black if white is not careful, best to depth of 15 is 22.Ne4 Qd5 23. Bxf6

In the game line if 22. b4 23 Rh7 mates in 9. Best given is (+6.5) 22. ...Bf5 23. Qxf5 vs (+10.6)22. ...Bf7, but a again a typical silicon piece-ceeding defense.

Feb-23-13  talsqueen: I got the first three moves, but not the rest.
Feb-23-13
Premium Chessgames Member
  kevin86: Sometimes a little sacrifice is needed to squirm into the enemy camp.

BUT,the end is brutal!

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