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Simon Kim Williams vs Merab Gagunashvili
Hastings (2006/07), Hastings ENG, rd 4, Dec-31
Pirc Defense: 150 Attack. Sveshnikov-Jansa Attack (B07)  ·  1/2-1/2
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-05-14
Premium Chessgames Member
  al wazir: I couldn't see a win by force, so I figured this was a spoiler and opted for 25. Rh8. I don't know what black's next move would be, but 25...Kg7 (to free himself from the pin) doesn't work because of 26. Rdh1, threatening 27. R1h7+.
Jan-05-14  WJW147: I'm not sure if it has already been noted but Black resigned after Move 46 which is the EXACT same position after move 37. Why?
Jan-05-14
Premium Chessgames Member
  diagonalley: i didn't even contemplate the knight sacrifice... there looked to be precious little compensation... i'd be interested to know what a machine's evaluation of the position is after white's 25th
Jan-05-14  M.Hassan: "Insane"
White to play 25.?
Equal materials

25.Nf5 gxf5
26.exf5 f6
27.g6 Rd8
28.Rxd8+ Qxd8
29.Rh7 Ke8 attempting to Bring the Rook out of pin

30.Rh8 Kf8 back to same square
31.Ne4 Qd5
32.Rxg8+ Kxd8
33.Nxf6+ and it is a Royal Fork
Time to check

Jan-05-14  yadasampati: <M.Hassan> in the line you give, move 32 for black is <32. ... Kxg8> and not <32. ... Kxd8>. And indeed <33. Nxf6+> is a nice Royal Fork :-)
Jan-05-14  yadasampati: <WJW147> Indeed the same position, and that is probably why the players agreed on a draw. Black did not resign :-)
Jan-05-14
Premium Chessgames Member
  morfishine: Black's position is collapsing and indefensible. This gives White considerable latitude on how to force the win. My #1 candidate is <25.Rh8> and #2 candidate is <25.Nf5>. White can even win with <25.Rd6>, so thats a candidate. In any case, I don't see how White can possibly lose

*Note: Due to the Packer playoff game which necessitates early planning, I'm going straight to the solution

*****
PM: White goofed this one up somewhere

*****

Jan-05-14  paramount: Gosh, this is very good puzzle, very hard. I hope i got this kind of puzzle every Sunday.

I admit i failed this one, i choose 25.a3 and that makes the puzzle strange. I checked with my Stockfish 4, it needs sometimes to find 25.Nf5!!.

When i failed, but i cant deny this is excellent.

Jan-05-14
Premium Chessgames Member
  Penguincw: Important thing about the puzzle I missed: The rook was pinned.
Jan-05-14
Premium Chessgames Member
  paulalbert: With the pin on the R at e7, 25 Nf5 seemed to be the logical candidate, but seeing all the followup variations was too insane for me.
Jan-05-14
Premium Chessgames Member
  gofer: I can see one nice sacrifice, which - if accepted - opens up black like a kipper. Ironically, if black refuses the sacrifice, white ends up with a massive attack with just 2 rooks and knight and forget about its queen!

<25 Nf5 ...>

25 ... gxf5
26 exf5 ...

The threat is now f6 creating a mating net around the king and also providing an excellent square for Nc3.

26 ... e4!

Black is trying to allow Qe5 and Qf4+ causing some issues for white's attack.

27 f6 Qf4+
28 Kb1 ...

28 ... Nxf6
29 Rh8+

28 ... axb4
29 fxe7+ ...

29 ... Ke8
30 Rh8

29 ... Kg7
30 Qd4+ Kg6
31 Ne2 / mating

29 ... Nxe7
30 Rh8+ Kg7
31 Qd4+ Kg6
32 Rh6+ Kxg5
33 Rg1+ mating

But black should not accept! But how to refuse????

<25 ... axb4>
<26 Rh8! ...>

Ouch! White is now threatening Nxe7 winning

<26 ... gxf5>
<27 exf5 bxc3>
<28 f6 ...>

This all looks fine for white, not sure how black can defend this one.

~~~

Hmmm, <28 ... Re8?>. Does black really want to box his king even further??? Why doesn't <29 Rdh1> work? It leaves only queen moves for white...

28 ... Re8
29 Rdh1 ...


click for larger view

Black cannot deal with the threat of R1h7 followed by Rg7...

30 ... Qa5
31 R1h7 Qxa2
32 Qxc3 ...

30 ... e4?
30 R1h7 Qf4+
31 Kb1 ...

30 ... Qd7 (Qd8 seems worse)
31 Qxc3 Red8
32 R1h7 Qd1+
33 Kb2 ...

Jan-05-14  Cheapo by the Dozen: Before looking at the game, my main idea is
25 Nf5 gxf5
26 ef followed by getting a pawn to f6.

If 26 ... Ke8
27 Rh8

If 26 ... Kg7
27 f6+ Nxf6
28 gxf6+ Kxf6
29 Rh6+ followed by
30 R(1)h1 with a nasty attack.

But I'm not seeing the win after
26 ... f6, with no better ideas than
27 Rh8 Kf7 or Kg7

Jan-05-14  RandomVisitor: After 21.Qe3 black might have a better move: the white attack now melts away like polar ice in global warming:


click for larger view

Rybka 4.1 x64:

<[+0.11] d=19 21...Qb6> 22.Qxb6 Nxb6 23.Rxd8 Rxd8 24.Nd1 Bc8 25.Nb2 Be6 26.Nd3 Nd7 27.Bh3 Ra8 28.Bxe6 Kxe6 29.Rh8 Rf8 30.Rh7 Kd6 31.Kd2 c5 32.bxc5+ Nxc5

Jan-05-14
Premium Chessgames Member
  Jimfromprovidence: I could not figure out that white was winning for sure until after 29 Qxc3.


click for larger view

The threat is 30 Qh3 seeing 31 Qh6#.

The text 29...e4 30 Qh3 Qf4+ 31 Kb1 Qxg5 does stop that particular threat but the position is still losing for black.

White is winning after 32 fxe7+. The notations do not reflect that fact.


click for larger view

I will leave this as a side puzzle. The best way to go is to attack the queen.

Jan-05-14  RandomVisitor: After 25.Nf5! black chooses the way he gets mated.


click for larger view

Rybka 4.1 x64:

<[+4.10] d=21 25...a4> 26.Nxe7 Qxe7 27.Qd6 Re8 28.Rh7 Ba8 29.Kb2 Rc8 30.a3 Re8 31.f3 Bb7 32.Qd7 Ra8 33.Rd6 Rc8 34.Qxe7+ Kxe7 35.Rxg6 Rf8 36.Rgg7 Ke8 37.Rh8 Ne7 38.Rxf8+ Kxf8 39.Rh7 Kg8

Jan-05-14
Premium Chessgames Member
  chrisowen: If pawn recapture ignoble said knight feels like f6 bangs a floss will offload and win the day tooh free in and claw for I be proof 25...axbb 26.Rh8 gxf5 27.exf5 bxc3 28.f6 Rae8 29.Qxc3 e4 once bitten in twice shy fed pawn down black tries to create queen counter-play curious in arm f4 and win g5 threats of his own cyclic a bobbed feel over at h3 bone in these throat a vow g5 regain some parry in light again h7 or deem in a tour f6 xf7+ wins queen seem like for one advance damage done f5 and f6 iffy in I ogle e7 long leg however g8 secured cable wire in cadence off up entertain buggyride 29...Bc8 30.Qg3 Rd8 31.Rxd8+ he difficult in cart before the horse at a3 queen ticks the bill it apparent for light again creeps around the shadows h8 an a3 bell, enjoy beat fed a 31.Rxd8+ Bxd8 32.Qa3 five points adrift wins either knight and bishop or rook and queen (12.01).

Saviour clinch e7 rook and queen hem up memory in light hoofed across line little feinter accents to the throne acrossing accumulates a bet rook h8 and row look offer het uppper way in light rock the boat of course it is aint really a wave off 30.Qh3 Qf4+ black calls in too forfeit her bind in xray b1 single mind g5 ar in good jangle cough up rides a ring g5 back fable give breath of life in able side step to b1 jug a nought point looks looming unless fine play by lights side line off a 31.Kb1 Qxg5 32.Qh7 sits in camped affray enough in currency to deliver g8 a blow knight pins to f8 so black unbundles in a leap to unpin a8 threatens aid ogle give swaps off tender e7 honours eg ment richer sounds to fed a 32.fxe7+ kings eg re gate a leap beyond gaff in etc be 32...Kxe7 33.Rh5 Rd8 34.Rxg5 Rxd1+ driveing home the point rook he gives a drape over g5 black also has dam 33...Qd5 34.Rxd5 cxd5 line delve good 2 points up deaf faded a rook fell king by the way sides 35.Kb2 again 2 points up big margin (7.26).

Evermore aha faceing a ploy to do in h7 black he affabled room aim in cub to 32...Ra8 33.Rxg8+ a betting queens come off try angle pyramid scheme to invert a g8 in do cage (bombadier) rook artillery load the g8 under strain not so safe murky purple patch in g8 comes to a hault ergo at peg try 33...Qxg8 34.fxe7+? Light starts to wobble give f6 a chance at get him fluffs the line 34.Qxg8+ Kxg8 35.fxe7 Re8 36.Rd8 (7.52) wins right rook and bishop simple mop up job.

Twins encircling recase the joint sense got feel 34...Kxe7 35.Qxe4+ the start of a long boot winded road to seal king entomb catch e7 on the hop in gadfly be a mate I expect rook dabodd in give queen edict d6 a wall amounts in face off cliff 35...Kf6 36.Qf4+ super man e4 fertile ground in plough queen around rook da beast will pen a king thief in the night goes around houses queen feeds us tenance in jam define 36...Ke6 37.Qe4+ more drawish aim instead 37.Qd6+ scan the horizon coast is clear king one effects 37...Kf5 38.Qc5+ line cads up perchance couldnt resist two sheepish perhaps to dream suffix a cut I bind curry favour king backs to the wall edge off re yin and yang lesson dont get complacent in the endgames 38...Kf6 39.Rd6+ aim bed flow difficult to forsee the servicing 39...Kg7 40.Rd3 Re8 41.Qxd4+ addendum suddenly belly up black king aggregated queen stuck in behind light wins her bet majesty swindled out by rook a 41...f6 42.Rg3+ wins queen 1 point ahead (7.08). Light elects to feign a foilable front and bails for a draw in light of being a bishop behind best play safe I agree d6 as tricky to spot there follows a medley in light backs to be floods again cruise a king around rook dare devil join a d6 hightail should win aim in what again it you in think d6?

Aim blow in a ooh freer in flight as king too long winded queen or bet rook d6+ should wind let in godspeed you black emperors hatch e6s in bad costume 37...Kf6 38.Qf4+ I shall sign a number of nine checks ending him draw offers 46.Qe4+.

Jan-05-14
Premium Chessgames Member
  agb2002: White has a knight for a bishop.

White can try to take advantage of the pinned rook and the relatively unsafe position of the black king with 25.Nf5 gxf5 (else drop the exchange) 26.exf5 f6 (26... Ke8 27.Rh8 Kf8 28.f6 + -) 27.Rh8:

A) 27... fxg5 28.f6 + - [R vs B+P] and White has the attack.

B) 27... Kf7 28.Rdh1 fxg5 29.Ne4 Nf6 30.Nxg5+ Kg7 31.Rxa8 Bxa8 32.Ne6+ Rxg6 33.fxe6 and White has a rook and a dangerous pawn for a bishop and a knight and threatens 34.Rg1+.

C) 27... Kg7 28.Rdh1

C.1) 28... Rd7 29.R1h7#.

C.2) 28... fxg5 29.Ne4 looks similar to B.

D) 27... axb4 28.gxf6 bxc3 29.fxe7+

D.1) 29... Qxe7 30.Rxg8+ wins (30... Kxg8 31.Qxe7; 30... Kf7 31.Rg7+).

D.2) 29... Kf7 30.Rh7+ Ke8 (30... Kf6 31.e8=N+ Rxe8 32.Rxc7 + -) 31.Rd8+ Rxd8 32.exd8=Q+ Qxd8 (32... Kxd8 33.Qf8#) 33.Qxe5+ Ne7 (33... Kf8 34.Qg7+ Ke8 35.Qxg8#) 34.Rh8+ Kd7 35.Rxd8+, etc.

D.3) 29... Kg7 30.Rd8

D.3.a) 30... Kxh8 31.Rxa8 Bxa8 32.e8=Q + - [Q vs B+N].

D.3.b) 30... Rxd8 31.exd8=Q Qxd8 32.Qxe5+ Kf8 (32... Kf7 33.Rh7+ and mate in two; 32... Qf6 33.Rxg8+) 33.Qxc3 + - [R+2P vs B+N] and attack.

D.3.c) 30... Nxe7 31.Rxa8 Bxa8 32.Rxa8 Nxf5 33.Qxc3 + - [R vs N] and attack.

Jan-05-14  RandomVisitor: 25.Nf5 axb4 and now:


click for larger view

Rybka 4.1 x64:

<[+6.87] d=20 26.Rh8> gxf5 27.exf5 bxc3 28.f6 Rae8 29.Qxc3 <Bc8> 30.Qg3 Rd8 31.Rxd8+ Qxd8 32.Qa3 Qe8 33.Qd6 Bd7 34.fxe7+ Kg7 35.Qxe5+ f6 36.gxf6+ Nxf6 37.Rxe8 Bxe8 38.f4 Kf7 39.c4 bxc4 40.f5 Bd7 41.Qc5

Jan-05-14
Premium Chessgames Member
  gofer: I still haven't found out why <29 Rdh1> doesn't work...

29 Rdh1 Qd7
30 Qxc3 Qf5/Qg4!
31 Qe3 ...

White still holds the attack together and threatens to win everything. Black exchanges queens, but allows the loss of Ng8...

31 ... Qf4?
32 R1h7 Qxe3+
33 fxe3 Rh8
34 Rg7 (finally) Ke8
35 Rhxg8+ Ke7
36 Rxh8 Bxh8
37 fxe7 Kxe7
38 g6! Kf6
39 Rxf7+ Kxg6
49 Rh7

Any ideas anyone whether <29 Rdh1> works?

Jan-05-14  vajeer: <Jimfromprovidence:> Indeed. I got everything but failed to see Qxc3. I was considering Re1 to continue the attack. Given how bad Black's position is Re1 may be winning but Qxc3 is very straightforward. I think in your side puzzle, after 32...Rxe7
33. f4 Qxf4 (or Qf6)
34. Rg1 should win

32....Kxe7
33. Qd7+ Kf8
34. Rxg8+

A 34...Kxg8
35. Qxe8+ Kg7
36. Rd7 should win

B 34...Qxg8
35. Qd6+
B1. 35...Re7
36. Qb8+ Re8
37. Rd8 wins

B2. 35...Kg7
36. Rg1+ Kh8 (Kh7 then Rh1+)
37. Qf6+ wins

Jan-05-14  RandomVisitor: <gofer>I will post my computer run on that move in a bit, but 29.Qxc3 is such a strong move that the (possibly) small advantage from 29.Rdh1 is overshadowed.
Jan-05-14  WoodPushkin: Greetings

I missed this one. I figured 25.a3 was too tame for a puzzle and I simply missed 25.Nf5!! which at worst wins the exchange and breaks up Blacks defenses further.

Still I don't feel to bad as Stockfish and Critter couldn't find 25.Nf5 after an hour think at depth=29.

Which makes me wonder why computers have positional blindness?! The engines couldn't see this winning position until after the move was made and then it switched its rating from 1.6 to 6.62 for White.

Earlier this year at the Alekhine Memorial Vachier-Lagrave-Ding Liren arrived a position after 23...c4 which Houdini rated as slightly better for Black.


click for larger view

--01

Although play continued as less than perfect the experts at the tournament easily preferred Whites game due to Blacks cramped king side.

Again I ask what causes machine blindness...? It's clear one cannot rely solely upon silicon but must do the hard work to prove computer analysis right or wrong.

Terrific study.

JAH LOVE

Jan-05-14  RandomVisitor: <gofer>Well, it seems that 29.Rdh1 works after all:


click for larger view

Rybka 4.1 x64:

<[+3.32] d=22 29...Qd7> 30.Qxc3 Qf5 31.Qd2 Rd7 32.Qb4+ c5 33.Qxc5+ Rde7 34.fxe7+ Rxe7 35.Rd1 Qxg5+ 36.Kb1 Kg7 37.Rh3 Kf6 38.Rg3 Qf4 39.Rxg8 Be4 40.Rd6+ Re6 41.Rxe6+ Kxe6 42.Qxb5 Kf6 43.Qb6+ Kf5 44.Qd8 Bf3

Jan-05-14  Robin Gitte: This is one of GMSKW's greatest hits, except that he didn't win. First of all he missed move 34, as annotated, to queen. Then he didn't see the three move draw coming. Double whammy. Aargh! He features this game on one of his DVDs.
Jan-06-14  taobert: The absolutely WORST finish out of an absolutely amazing sequence of moves. The only analogy I can compare this to is your having sex with the last woman on Earth to save the human race, you finally find her after years of searching and all you have to do is ejaculate, but no, instead of the simply capturing twice on g8 and then taking on e7 with a winning game, you decide to pull out because you... well fail.
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