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Bruce M Amos vs Bent Larsen
Canadian Open (1968), Toronto, rd 7, Aug-29
Gruenfeld Defense: Three Knights Variation. Hungarian Attack (D92)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-13-10  stacase: It's what I would have done over the board, so it must have been easy enough for Monday (-:
Dec-13-10  Patriot: I spent a little longer on this looking for something more decisive, but given white's threat (31.Qxg6+) it makes more sense to trade down into a winning endgame.

30...Qxc1+ 31.Qxc1 Rd1+ 32.Qxd1 Rxd1+ 33.Kh2 Nxc4 . Black is up two pawns.

<<Formula7>: I saw the solution, but I didn't think it was the solution because it only wins a pawn.>

<<SamAtoms1980>: I thought 30 ... Rd2 31 Bxd2 Rxd2 was the game-winner, completely spacing out on 31 Qxg6+. This is typically how I lose games over the board.>

This illustrates why it is important to consider material differences and the other player's threats before calculating.

To be honest, I made the same mistakes. I looked at pieces but for whatever reason I didn't count pawn differences, so I thought black was "only" winning a pawn. It took a while to notice he is up two pawns. This is why it is best to see what's left...not just what is exchanged or captured.

I wasted some time looking at 30...Rd2, threatening the queen and 31...Qxf2+. Then I noticed white has 31.Qxg6+, giving white some initiative. If I looked at white's threats first, 30...Rd2 would not become an option.

Simple changes like this in thought process can make big differences in rating. OTB, material differences should already be known unlike puzzle positions where you have no idea what has already transpired. So it is necessary to artificially achieve this awareness by counting material differences.

Another point about puzzles is that you have no idea what the previous move was. OTB you may already be aware of at least one threat because you saw your opponent's previous move. But it is important to see ALL of your opponent's threats by seeing how the position changed, not just threats resulting from the piece that moved. This is a mistake I'm trying to correct in my own games. Simply by asking yourself "What can they do to me if it were still their move?", it becomes easier to see all of their threats. After all, how can you claim to know what the best move is unless you know all of your opponent's threats? If you have a forced mate then it doesn't matter what they are threatening. Or if their position is not safe, it may not matter what they are threatening. For example, they move a knight which forks both rooks and queen but the knight can be snapped off with BxN.

Dec-13-10  Patriot: <<Wade Keller>: Amateurs (like me) learn these steps to win a game: 1. mate quicky 2. gain a piece 3. gain on pawns 4. gain slight little position to nurture out victory eventually. So today on easy Monday we learn to win in #3. Trying now to learn in all 4. Is there actually more?>

I recommend reading NM Dan Heisman's article on "A Generic Thought Process": http://www.chesscafe.com/text/heism....

Dec-13-10  M.Hassan: <patriot:I wasted some time looking at 30...Rd2.....>

I did the same and realized that it won't work.
You have written quite instructive points.I add that in a recent article that I read, the author recommends the followings:

Immediately after every of your opponent's move you should answer the two questions:

1.What are your opponent's THREATS?

2.What are the CONSEQUENCES of your opponent's last move?

Although in a puzzle you do not know what the last move was,but it pays off to spend some time to see the THREATS for both sides.I have found the two points useful and I should add that unfortunately I forget to follow it all the time!

Dec-13-10  CapablancaFan122: I guess I'll be repeating what others have said but still: I easily saw <Qxc1+> but thought that there should be something more to the puzzle (it's Monday after all) so kept looking. I thought it might be a diversion problem, so I tried to find a move that diverts the rook from the first rank to allow a bank rank mate but stopped when I realized the King has an "air hole" on h2... In any case, did white really have to resign? I mean sure, you are up against Larsen, but I guess it's still playable.
Dec-13-10  pericles of athens: I let fritz 12 run analysis for about 10 seconds, and it gives the position after white's 30th move as -4.15.

30. Qc2 was a bad blunder.

Dec-13-10  pericles of athens: my post looks weird. -4.15.
Dec-13-10  Patriot: <M.Hassan> Thanks! I try to give useful advice that can be used for solving puzzles and OTB play. Hopefully it doesn't come across as "preaching". Other kibitzer's also seem to feel the way you do, which is why I continue to do it.

Being aware of your opponent's threats and using that knowledge to help establish candidate moves, can add hundreds of rating points for player's who don't follow it -- *IF* it is done on every move. It doesn't mean that you should play reactively to your opponent's threats, however. It means that whatever candidate you choose must deal with that threat--either directly (e.g. capturing the attacking piece, guarding or moving a threatened piece, etc.) or indirectly (e.g. counter-attack). Following this advice 95% of the time is like a big ship with a two-foot hole in the bottom -- it will still sink!

Dec-13-10  knight knight: Hmmm, black's a pawn up, I see 30...Qxc1+ 31. Qxc1 Rd1+ 32. Qxd1 Rxd1+ 33. Kh2 Nxc4 34. Bc3 leaving black two pawns up.

That's all I see, hope I'm not missing very easy Monday!

Dec-13-10  lost in space: I love Mondays!

30...Qc1+ 31. Qxc1 (else: white queen is gone)

31...Rd1+ 32. Qxd1 Rxd1+ 33. Kh2 Nxc4

and the 2 extra pawns on the queen side are enough to win easily.

Today later as just arrived from Florence (Italy)

Dec-13-10  WhiteRook48: I got it qxc1+ rd1+
Dec-13-10  MiCrooks: This is more Tues fair, but I would love to see CG pick it up a notch on a regular basis. The combo is easy to see, but what should make you go for it immediately is the threat of Qxg6+. Any other tries would have to contend with this, and thus give White the potential for some play. Qxc1+ not only trades off two major pieces but wins an additional pawn in the process.
Dec-13-10  muralman: I missed it. Got Sunday, but for some reason, the easy ones bamboozle me.
Dec-13-10  Bignevermo: got it...
anybody recommend a good opening book? i have asked for one for X-mas.... anybody reco one in particular? thanks in advance!
Dec-13-10  majortool: Why not
... Rd2
Bxd2 Rxd2
???
Dec-13-10  majortool: ahh .. QxP+
Dec-13-10  skemup: I expected some easy mate starting with queen sac but it was just one pawn win variation, little frustrated I notice it at last.. uff ego is saved.
Dec-13-10
Premium Chessgames Member
  Once: Okay, so it's a Monday easy that doesn't end in a flashy mate. But before we all declare that "life is a lemon and I want my money back", let's look at what black achieves...

In the puzzle position, black has several things he would like to do:

1. he would like to stop white from playing Qxg6+

2. he would like to play Nxc4, but c4 is twice protected by the white queen and rook. And the Nb6 is pinned against the Rd8.

3. he would like to swap off heavy pieces so that he can cash in on his extra pawn

4. He would like to play Rd1+, but this square is twice defended by the white queen and rook,

5. He would like to create a passed pawn.

6. He would like to kick the white king to the edge of the board where his majesty would be further away from the aforementioned passed pawn.

7. He would like to get one of his rooks safely to the first or second ranks where it would terrorise nearly all the white pawns.

Sounds like a tall order, but this is how it all pans out:

30... Qxc1+ 31.Qxc1 Rd1+ 32.Qxd1 Rxd1+ 33.Kh2 Nxc4


click for larger view

And black will quickly follow up by pushing his passed pawn and plonking his rook on the second rank. All seven victory conditions achieved in just four moves

And who said that men couldn't multi-task?

Dec-13-10  wals: Whoopee. Her Royal Majesty does it again.

Rybka 4 x 64 blunders only

depth: 19 : 13 min :
White
(-4.40):30.Qc2. Best, Re1, -0.84.

1. (-0.84): 30.Re1 e5 31.a4 f5 32.Qb5 Qd4 33.Rge3 e4 34.R3e2 Qe5 35.Rb1 R8d7 36.Rbe1 Kg8 37.Rc1 Kh7 38.Ree1 Qd4 39.Rc2 Rd8 40.Bxb6 axb6 41.a5 bxa5 42.Qxb7+ Qg7

2. (-0.92): 30.Rf1 Re6 31.Rg4 Qf5 32.Rg3 Re2 33.Re3 Rxe3 34.Qxe3 Rd4 35.Bxb6 axb6 36.Re1 e5 37.Qb3 Qe6 38.Qf3 e4 39.Qf4 g5 40.Qc7+ Rd7 41.Qc8 f5 42.Kh2 Qd6+

White resigned after move 31...Rd1+.

Dec-13-10  lightbishop c5e6: Quite easy, but one just immediately looks for the flashy mate or crushing pretty finish. It's a nice pseudo-sac today, id expect this for Tuesday actually
Dec-13-10  estrick: <All seven victory conditions achieved in just four moves> Excellent points!
Dec-13-10  waustad: I got it fairly quickly but kept looking for something like the usual Monday mate.
Dec-13-10  parisattack: This game looks familiar. I think it is included in Larsen's famous Zoom book, perhaps?
Dec-13-10  DarthStapler: Got it
Dec-14-10
Premium Chessgames Member
  kevin86: Is this one no more than a glorified exchange? Black does end a pawn ahead and should win.
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