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Anatoli Vaisser vs Byron Jacobs
? (1987)
Nimzo-Indian Defense: Huebner. Rubinstein Variation (E42)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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Aug-25-07
Premium Chessgames Member
  patzer2: If Black plays 30...Kg7, then 31. Re8! wins.
Aug-25-07  psmith: <zndprx>: On your suggestion of 29. Qd6 Qxd6 30. cxd6 simply 30... Bd7 is good for Black: the d-pawn will fall.
Aug-25-07
Premium Chessgames Member
  fm avari viraf: The only move that comes to my mind is 29.Bxg6 fxg6 [ not ...Qd5 then 30.Qb8 wins ] Here, there are two main lines, first one is 30.f7+ & the 2nd one is 30.Re7 & the latter is my choice as it invades the 7th rank as well as threatens to mate. Here, Black will have to part with his Queen to avoid mate but the ensuing end game White's Queen Vs Rook + Bishop is a clear win for White.
Aug-25-07  aragorn69: It seems nobody gave the following (simple) variations yet...

a) 34.-Kf7 35.Qh7+ Kf6 36.Rf1+ Ke6 37.Qf5+ Ke7 38.Qf8 mate (thx to the d6-pawn!)

b) 36.-Qd7 37. Qe5+ Kf3 38.Rf1 mate (thx to the h3-pawn)

Aug-25-07  soberknight: This seems to be a common problem with me: I start the Bxg6 analysis, then after a few moves - actually at Qxh6+ Kxf7 in this game - I say, "Nah, there's no point." If I had bothered to carry on the analysis five moves longer, I should have found the mate.
Aug-25-07
Premium Chessgames Member
  An Englishman: Good Evening: Perhaps this was a bit too easy for a Saturday--I saw both the actual game variation and the line found by <psmith>, <RandomVisitor>, et alia.

Then again, judging the difficulty of a combination can't be much easier than solving one.

Aug-26-07  Fezzik: I was asked why I thought 29.Qh6 was reasonably. I saw 29.Qh6 Qf6 30.Bc6?! Rc6?? (30..Qc6!) 31.Re8. I don't think White is actually losing the position after 30.Qc6, but he certainly isn't winning either.
Aug-26-07  cheski: As regards the rather superfluous overly deep analysis into 30.f7+ versus 30.Re7, several quotes seem applicable:

Kasparov, in 1989, when after winning the world cup, he was questioned about a few opportunities missed:

"I showed my superiority...I was not forced to show my best" (Don't you just love this Aries!)

Then the opposite view:

"If you find a good move, look round for a better one."

Well, yes, but...What if you have already found a very very good move? Like here in this game.

And it seems unnecessary to look a gift horse in the mouth.

Far more interesting is to see what would have happened if Black had postponed his move 27...h6, and got rid of the dangerous white Bishop on =e4= first.

Aug-26-07  znprdx: thanx <psmith> like I said I maybe I should give up Chess - I kept seeing the impossible like rooks becoming queens on the 8th rank :)
Aug-26-07  znprdx: <cheski:Far more interesting is to see what would have happened if Black had postponed his move 27...h6, and got rid of the dangerous white Bishop> Well 28.Qh6 Qf8 29.QxQ KxQ 30.RXB now if Rd7 31.c6 and what do you see now? White should win easily....(since now the Black King can be mated on the d file in certain lines)
Nov-29-14  Dr. J: Various posted analyses from 2007 claim to show 30.Re7 is slightly superior to 30.f7+, but they fail to provide a refutation to 30.Re7 d3 31.Rh7 g5 (31...Kg8? 32. Rh8+ ) 32.Qe5 Be8 or 32...Bd5. They may still possibly be correct, but the variations after 30.f7+ seem much clearer to me, with optimal play then being 30...Kg7* 31.Re8 Qxe8 32.fxe8/Q Bxe8 and now (instead of 33.Qxd4+, when Black can still fight by blockading the passed pawn at c6) 33. Qe4 Kf8 (33...Bc6? 34. Qe7+ K-any 35. Qd8+ K-any 36. Qc8 ) 34. Qf3+ Kg8 35. Qe2 Ra8 36. Qe4 Rd8 37. c6 Bf7 (+8.12 according to <MostlyAverageJoe>, whose valuable analysis is marred by some typos).

*The game continuation 30...Kf8?? was clearly shown by <aragorn69> and others to be disastrous, leading to loss of King or Queen after a mere 8 or so forced moves.

Nov-29-14  diagonalley: i didn't work it right through (too deep for diagonalley) but 29.BxP stands out as a strong candidate, especially since a mighty pawn then arrives on KB7
Nov-29-14  gofer: I really like the fact that Ra6 is doing absolutely nothing. So long may it last! So that rules out moves like Bxc6, Qd6. The secondary thing we need to notice is that white is threatening Qhx6 mating!

<29 Bxg6 ...>

The refusal...

29 ... Qd5
30 Be4 Qg5+
31 Qxg5 hxg5
32 Bxc6 Rxc6
33 Re5

29 ... Be8 (or any bishop move really!)
30 Bxf7+ Kxf7 (Bxf7 31 Qg4+ mating)
31 Re7+ Qxe7 (Kf8 Qxh6+ mating or Kg8 Qg4+ mating)
32 fxe7+ Kxe7
33 Qxd4

29 ... any king move
30 Qxh6+ mating

29 ... Ra7
30 Qxh6! Qxf6
31 Bh7+

<29 ... fxg6>
<30 Re7 ...>

30 ... Qd5
31 Qb8+ mating

31 ... Be8
32 Qxh6 Qxe7 (forced)
33 fxe7 Rf6
34 Qh4 Kf7
35 Qxd4

So is this it?

~~~

Nope. Nil Point! I agree that 30 f7+ is far better than 30 Re7. <30 Re7 d3!!> is just a pain in the butt compared to the simple continuations after 30 f7+

Nov-29-14  morfishine: Fun Puzzle with a delightful combination of themes, namely a piece sacrifice for tempo, checks for initiative and a forced sequence to avoid the Queen fork. Very pleasing and fluid.

The fun starts with <29.Bxg6>

29...fxg6 30.f7+ Kf8 31.Qxh6+ Kxf7 32.Qh7+ Kf6 Forced, otherwise the Black Queen is forked

33.Qh4+ g5 Again forced to avoid the Queen fork

34.Qh6+ Kf7 35.Re6 (Better than 35.Qe6+, I guess but the branches are spreading too fast!)

*****

Nov-29-14  Dr. J: <<gofer> ...Nope. Nil Point! ... 30 f7+ is far better than 30 Re7 d3!!>

You're being too hard on yourself. Read <MostlyAverageJoe>'s long post. The two choices apparently are of about equal value, although proving this is hard.

Nov-29-14  Andrijadj: It is way too easy for Saturday puzzle. It requires calculation, surely, but Bxg6 is so obvious and the only candidate move in a position. In addition, after Bxg6 everything is forced and it's basically one-liner, with almost every white move a check after which black's response is forced.
Nov-29-14  morfishine: <Andrijadj> Good points. The noteworthy feature of this puzzle isn't necessarily the first move: A premium is placed on calculating down the line; For example, why doesn't 29...Be8 save Black? Or Why is 33.Qh4+ better than 33.Rf1+

White needs to realize <e6> is the best square for the Queen while keeping the rook on the e-file; and of course 36.h3 is the final nail in the coffin, and difficult to visualize back on move 29

I didn't

*****

Nov-29-14
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens 29... Bxe4, looking for counterplay by attacking the pawn on f6 and pushing the d-pawn.

The first idea that comes to mind 29.Qxh6 Qxf6 30.Bxc6 fails to 30... Qxc6 (30... Rxc6 31.Re8#).

This suggests 29.Bxc6 Rxc6 30.Qxh6 but now 30... Rxf6 looks good for Black.

Another option is 29.Bxg6, to clear the e-file for the rook:

A) 29... fxg6 30.Re7

A.1) 30... Qf8 31.Rg7+ Qxg7 (31... Rh8 32.Qxh6#) 32.fxg7 Kxg7 (32... Ra8 33.Qxh6 Kf7 34.Qf4+ Kxg7 35.Qc7+ wins) 33.Qxd4+ Kh7 (33... Kf7(g8) 34.Qc4+ and 35.Qxa6; 33... Kf8 34.Qh8+ Ke7(f7) 35.Qc8 Bb5 36.Qb7+ wins.

A.2) 30... Qd5 31.Qb8+ and mate in two.

A.3) 30... d3 31.f7+ Kf8 (else mate in two at most) 32.Qxh6+ Kxe7 33.Qg5+ Kxf7 (33... Kd7 34.Qxd8+ Kxd8 35.f8=Q+ Kc7 36.Qd6+ Kb7 37.Qxd3 + - [Q+2P vs R+B]) 34.Qxd8 Bb5 35.c6 Rxc6 (35... Bxc6 36.Qxd3 + - [Q+P vs R+B]) 36.Qd5+

A.3.a) 36... Re6 37.Qxb5 Rd6 (37... d2 38.Qd7+ and 39.Qxd2; 37... Re2+ 38.Kf2 d2 39.Qd7+ and 40.Qxd2) 38.Qxa4 d2 39.Qd1 with a winning pawn ending after trading the queen for rook and pawn.

A.3.b) 36... Ke7(f8) 37.Qxb5 Rc1+ (37... d2 38.Qb4+ and 39.Qxd2) 38.Kf2 d2 39.Qb4+ wins.

A.3.c) 36... Kg7 37.Qxb5 d2 (37... Rc1+ 38.Kf2 d2 39.Qd7+) 38.Qe5+ Kh7 (38... Kf7(8) 39.Qf4+; 38... Kg8 39.Qd5+; 38... Rf6 39.Qd4) 39.Qe7+ Kg(h)8 40.Qd8+ and 41.Qxd2.

A.3.d) 36... Ke8 37.Qxb5 Kd7 38.Qxd3 wins.

A.3.e) 36... Kf6 37.Qxb5 Rc1+ 38.Kg2 d2 39.Qb6+ wins the d-pawn in two moves.

B) 29... d3 30.Qxh6

B.1) 30... Qxf6 31.Bh7+ Kh8 32.Qxf6+, etc.

B.2) 30... Qd4+ 31.Kf1 (31.Re3 Qg4+ 32.Rg3 Qd1+ and Black seems to have perpetual) 31... Bg2+ 32.Kxg2 Qg4+ (32... Qd5+ 33.Be4 wins) 33.Kf2 Qd4+ (33... Qxg6 34.Re8#) 34.Kg3 wins.

Nov-29-14  awfulhangover: Ouch! I am not the only who went for: 28. Bxc6 Rxc6 29. Qxh6, cos I thought Qf8 was met by 29.Re8! But 29...Rxf6 makes me the loser. Sigh, almost as bad as Carlsen-Anand, game 6..
Nov-29-14  M.Hassan: "Very Difficult"
White to play 29.?
Dead equal in material:

29.Bxc6 Rxc6
30.Qxh6 Rxf6
This line was my first try and it shows that White can not continue attacking. Try:

29.Bxg6 fxg6
30.f7+ Kf8
31.Qxh6+ Kxf7
32.Qh7+ Kf6
<if 32...Kf8, it will be disastrous 33.Qh8+ Kf7 34.Qxd8 and Black Queen is gone> 33.Qh4+ g5
34.Qh6+ Kf7
35.Re6 Be4
36.Rxa6 Qe7
37.Rd6 Bf5
38.Qh5+ Kg7
39.Qf3
Although White is stronger, but this looks like drawish: 39.........Qe1+
40.Qf1 Qe3+
41.Qf2
Time to check and see where I have gone wrong
===========
Yes 35.Re6 was my wrong move

Nov-29-14
Premium Chessgames Member
  Penguincw: Saturday puzzles are rarely simple, but I pretended today's puzzle was simple: 29.Bxc6 Rxc6 30.Qxh6 Qxf6?? (Rxf6) 31.Re8# 1-0, but that's not going to work.

Nice try by black to try to save the game with 36...Bh1. If this were a blitz game, some people might've taken the bishop, even though the queen is hanging.

Nov-29-14
Premium Chessgames Member
  PawnSac: <fm avari viraf: 29.Bxg6 fxg6 // two main lines, 30.f7+ & 30.Re7 & the latter is my choice as it invades the 7th rank as well as threatens to mate. Here, Black will have to part with his Queen to avoid mate.. >

Strongly agree. The Re7 line does as you say.. takes the 7th, threatens mate, but also is the more pragmatic choice, since when the opponent sees he must give up the Q to prevent mate, it normally induces immediate resignation. The f7 variation requires more precision and length, and black will play on another 6 moves till the win obvious.

Nov-29-14  reticulate: My favorite move in the whole sequence was the modest killer 36. h3. I admire Vaisser's confidence that he has correctly analyzed the position and knows that there is time for this simple pawn move to seal the deal. Most players, including me I'm sorry to say, would probably move something like 36. Rf1, thinking you've got a mate. But after 36...Bf3 events become murky.
Nov-29-14  waustad: I got as far as 32. Qh7+ pretty quickly for a Saturday puzzle.
Nov-29-14  cyclemath: <gofer> After 29 Bxg6, the refusal 29 ... Qd5 invites a quick mate with 30 Qb8+.
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