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Larry Melvyn Evans vs Wolfgang Uhlmann
Amsterdam IBM (1971), Amsterdam NED, rd 8, Jul-21
King's Indian Defense: Saemisch. Bobotsov-Korchnoi-Petrosian Variation (E81)  ·  1-0



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sac: 36.Bxg5 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Feb-10-06  iamverywellatchess: There are many games that exist that have many fun ways!

This might be one of them, if you "look for the check-mate"!

I will answer all of your questions at this point in time.

Feb-10-06  macphearsome: Now to clarify the confusion and mixed opinions amongs the kibitzers...

is the threat ♖e6+ or ♕x♖ ?

At first I thought it was ♖e6+ forcing the king back to g7 and allowing the queen to check on the g file. However, after the bishop blocks, it looks like the king can gain a momentary respite from the attacks after ♖e7+ is blocked by ♖g7...

So is the quieter continuation, ♕x♖, grabbing a free rook and putting a double attack on the bishop at g7, the better?

Feb-10-06  DanRoss53: I got 36. ♗xg5! and 37. ♕f7!, but missed 38. ♖e7!! I was thinking 38. g4?? instead, but after 38... ♕xb2+!, Black can force a draw.
Feb-10-06  Hudson Hawk: <PizzatheHut> My vote if black plays 36. ...Qf2 would simply be to take the h-pawn with the bishop. I don't see too may viable responses for black in that situation. The best endgames black could hope for leave white with 3 additional pawns (two of them passed) favor white. Haven't gone too deep though, I'll have to ask Fritz later.
Feb-10-06  PizzatheHut: <Hudson Hawk> My earlier comment about 36...Qf2 was in response to <gadfly>. He suggested that 36. h4 wins also, but it's difficult to see that after 36...Qf2. Perhaps it does still win, I haven't checked with Fritz, but it's certainly not as clear as the game continuation.
Feb-10-06  zhentil: <dkulesh> That's the funniest thing I've ever seen. You mean you can only get half the puzzles, but you can still play 1200-level chess? Incroyable! Why do you even bother with the puzzles? Just challenge Topalov to a match!
Feb-10-06  iamverywellatchess: Silly. We all know that many of the users of this web-page do not have not more than one-half of the skill that they say that they have! To say that you have large skill when you do not have even one-half of the large skill that you really have is not making us have fond rememberies for you!
Feb-10-06  JustAFish: thought of 36 Rd7 planning 37 Rxd6 black queen moves, 38 Rxh6 Kxh6 39 Qxg5 Kh7 40 Qh5+ Bh6 41 Qxh6 mate. I think 36 ... Kh8 complicates this, however, and it no longer works. At that point, however, I think the line that was actually played still works. Any thoughts?
Premium Chessgames Member
  patzer2: White's decoy 36. Bxg5!! prepares a decisive mating attack after 36...hxg5 37. Qf7! Kh6 38. Re7!
Feb-10-06  dakgootje: Very nice puzzle, saw the idea but missed the moves ;-)
Feb-10-06  alefromitaly: Saw all, very nice. Let's wait for the weekend to "rock".
Premium Chessgames Member
  ganstaman: To everyone still talking about 36...Qf2, do you not like my earlier response that 37.Qf6 wins? I thought about 37.Bxh6, but I don't see how white forces a win after 37...Kxh6. Now, the pin is broken and white doesn't have enough 'checking' power. The black bishop can move, possibly to block a check, and that opens up the Rook and Queen to threaten mate on g2. That seems far from winning for white, IMO.

One suggestion was 36.Bxg5 Qf2 37.Bf6, and then you say the white king can escape perpetual check? Hmmm, maybe you're right, actually. I keep getting stuck and confused. 37...Qf4+ 38.Kg1 Qe3+ 39.Kf1 Qf4+ 40.Ke(1 or 2) Qxe4+ 41.Kd(1 or 2) Qxd5+ 42.K-anywhere Qxg2

So maybe that's not perpetual, but I just won 3 pawns for black and got the queen defending the pinned bishop. I don't know, maybe I'm biased, but I think that only 37.Qf6 is the only decisive winner against 36...Qf2.

Feb-10-06  EmperorAtahualpa: <Saw the sac but didn't see the continuation.>

Well, <blingice>, I saw plenty of sacs, but what's the point if you don't see any continuation? :)

Feb-10-06  EmperorAtahualpa: I missed this puzzle completely by the way....was looking at 36.h4?? (ouch)
Feb-10-06  zhentil: <ganstaman> in your line 37...Qf4+ 38 Kg1 Qe3+, white plays 39 Kh1 and it's over. There's no perpetual.
Premium Chessgames Member
  ganstaman: <zhentil: in your line 37...Qf4+ 38 Kg1 Qe3+, white plays 39 Kh1 and it's over. There's no perpetual.>

Ok, very nice. So Bf6 seems to work out too, I guess. That f6 square seems kinda good for white in this position despite being attacked by the black bishop and queen :)

Premium Chessgames Member
  kevin86: This is a nice gradual attack sequence that goes by the numbers:

First:sac the bishop

Second:threaten mate with the queen

Finally:bring the rook into play,threatening mate at the same time.

Feb-10-06  buzzymind: Like some others here I thought of 36. ♕f7. Not that I didn't consider 36. ♗xg5, I liked 36. ♕f7 because it limits black's options and I've made the threat 37. ♗xg5 very real (sometimes the threat is stronger than the action). In addition, I didn't like black getting control of the f file by playing 36... ♕f2. So, the 36.♕f7 was more positional for me and a move I would likely play in a regular game. But, I do agree with the continuation (36. ♗xg5 ♕f2 37. ♕f6!). Simple enough win with the passed b-pawn once pieces are exchanged.
Feb-10-06  YouRang: I got it! I figured (sort of guessed really) that 36 Bxg5 was the key move. After 36...hxg5, I looked at 37. Qxg5 for a while, but I couldn't make it stick.

But then I (finally) considered 37. Qf7, which threatens Qh5# and also maintains pressure on g7, preventing black from moving his rook. The only trick was dealing with 37...Kh6. After a moment, I realized that 38. Re7! made an unstoppable threat of Re6 and soon mate. :)

Feb-10-06  TopaLove: 20 ... ♘xe2 was a terrible mistake. It becomes a battle of good bishop x bad bishop.
Feb-10-06  Nostalgia: <EmperorAtahualpa: I missed this puzzle completely by the way....was looking at 36.h4?? (ouch)> Don't feel bad; I was too, until I played it on a board. :) They can't all be good ideas...


Feb-10-06  doglikegroove: It must be one of the seven signs of the apocalypse; I solved a Friday, full line and all. Get your affairs in order...
Feb-10-06  Jim Bartle: Thanks for the heads up. If Kramnik and Topalov announced they've agreed to a match, we'll know the end is near.
Feb-10-06  RookFile: I was looking at 36. h4, that ...Qf2
is a terrific resource. Normally a move like that just plain wins.
Feb-10-06  Jacobb: (i AM VERY WELL AT CHESS)\\\\\\\\\\\\\\\\\\\\\\\\\
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