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Casas vs Luis Roberto Piazzini
Buenos Aires (1952), Buenos Aires ARG
Queen's Gambit Declined: Orthodox Defense. Rubinstein Variation Flohr Line (D62)  ·  1-0



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Kibitzer's Corner
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Premium Chessgames Member
  moronovich: A very charmimg mate.

And as so often: the cavalry gets the last word ;)

Oct-04-11  kevin86: Queen sac leads to a variation of Anastasia's mate-this time with the knight at e7 mating.
Oct-04-11  Patriot: <jackalope> Visualization is the ability to mentally move the pieces in your head. So it doesn't help to improve it whenever you physically move them on a board.

<I'm curious about chess calculation - it is a concept I've only recently come across and I wonder if it is something I should learn to help see move combinations/mate solutions.> It's extremely important. Practicing tactics will help you to see patterns, but it's more important to develop a good thought process to know which moves to consider (and in what order).

Oct-04-11  Marmot PFL: Nice trap, but I found by playing the white side that if black just plays 10...Bh6 white has nothing better than 11 Nc3 with no advantage.

This is a drawback to many opening traps - if the opponent avoids them you end up with nothing.

Premium Chessgames Member
  chrisowen: <Marmot PFL> I next raid h4 qxh7 it heading off b3 check naps thin picking

d5 cease decline I rote dismiss it against g5 too loch h4 story

establish scintillating climax e7 mate sigh send black g6 local

bain bob

Premium Chessgames Member
  Once: <alexrawlings> There's lots of good advice in the kibitzing today. I can cheerfully agree with all of it. Here's another couple of thoughts to bear in mind.

Everyone else has said it, but it really does bear repeating. Visualisation and deep calculation does get easier with practice. It's like using weightlifting to build up muscles. So it's well worth practising the skill as often as you can. Even when you've solved a POTD, it's still worth playing through the lines suggested in the kibitzing - even the mistakes! - to give your visualisation muscles a workout.

The other trick is to think in chunks rather than on a piece by piece basis. That means looking at groups of squares rather than individual squares.

So in today's position, we have a mating net. And that means that we can divide the squares into two groups. Those which are lethal to the black king and those which are safe. The Rh1 covers the entire h file, so that can be written off as lethal.

The g pawn (once it gets there) covers f6. We don't need to think about the h6 square cos its already covered by the Rh1 "h file is lethal" chunk.

The g pawn is lethal because it is protected by the Nf3.

Ne7 makes g8, g6 and f5 lethal - ie all of the remaining white squares.

In other words, white covers all of the squares in the top right hand corner of the board.

What is more, these squares will stay lethal until black gets a spare move to block or capture. And we are not gonna give him that spare move because every move in our combination is a check.

And that is all you need. The other pieces can twiddle their thumbs for all we care.

Mating the enemy king away from the edge is one of the hardest things to visualise. But I find it helps if you think about it as a similar exercise to the microsoft game of minesweeper. Every square is either lethal or safe at any one point. All we need to do is work out where the bombs are.

Oct-04-11  Memethecat: <14Nf4#> noooo! What a fool, I can't believe I missed the f5 escape square, & even worse I saw <14Ne7#> but thought both moves achieved the same result. I hang my head in shame.
Oct-04-11  scholes: Chess is 90 % visualization
Oct-04-11  Granny O Doul: The late Todd Southam repeated this game against Jay Bonin in some World Open tournament.
Premium Chessgames Member
  OhioChessFan: If I had to guess, Black didn't realize before Qa5+ that the b4 Pawn would be protected. Sort of easy to overlook that Knight on d5 as a defensive piece.
Premium Chessgames Member
  OhioChessFan: <AR: and after visualising two moves forward I just can't hold the position in my mind and keep having to start again from scratch.>

I am just horrible at visualization. It is very frustrating to me. I've never been able to put in the work to improve, so if I don't find something quickly, I'm in trouble. That's one nice thing about team games. You can go ahead and move the pieces around in analysis. There is one very well known kibitzer who also admits to serious problems with visualizing. One place it's not such a debilitating weakness is in team games, so maybe you should consider making that your specialty. Or you could be industrious and work at it.

Oct-04-11  Antiochus: Fernando Casas versus
Luis Ruben Piazzini
or the same
Luis Roberto Piazzini
Oct-04-11  Rocambole: Luis Roberto Piazzini (Buenos Aires, 1905-1980), campeón argentino en 1933. Integró el equipo olímpico argentino en las olimpíadas de Estocolmo (1937) y Buenos Aires (1939). Una semblanza de Piazzini la resume en su página el GM Zenón Franco:
Oct-04-11  BOSTER: <alexrawlings> <in my mind the pawn on g5 was loose>. This is he position in <alex's> imagination after 12.Qxh7+ Kxh7 13.hxg5+ Kg6

click for larger view

Here he could play 14.Nh4+ Kh6 15.Nf5 + Kg6 16.Nfe7+ Kg5 17. f4+ Kg4 18.Be2+ Kg3 19.Kf1 and this is the final position with mate in couple moves.

click for larger view

Oct-04-11  Julian713: Got it!! Notice how Ne7# is the winning move regardless of where the Black King tries to escape. Who would have figured that 9...Bxg5 is where Black goes wrong!! At least, that's how I see it with my non-computer-aided novice analysis :D
Oct-04-11  newton296: pretty tough one because you gotta see the mate threats about 4 moves deep.

I got of to a great start finding Qxh7+ Kxh7 h4xg5+Kg6 but then I thought Bd3+ was mate messing up the combo!


Oct-04-11  Ferdigus: Cool mate!
Oct-04-11  stst: Very tiring and taxing day, now this is somewhat relaxing... 12.QxP+ KxQ
13.PxB dis+ Kg6 (if Kg8, 14.Ne7#)
14.Bd3# K is under both B and P attack paths.
Bed time for another tomorrow's struggle....
Oct-04-11  LIFE Master AJ: 12.QxP/KR7 check. (12.Qxh7+)

13.RPxB/KN5 check (13.hxg5+)

14.Knight-to-King's-Seven. (14.Ne7#)

Works against any Black defense, Black probably resigned after White's thunderbolt.

Oct-05-11  LIFE Master AJ: Casas - Piazzini [D62]
Buenos Aires, Argentina; 1952.

1.c4 Nf6; 2.Nc3 e6; 3.d4 d5; 4.Nf3 Be7; 5.Bg5 Nbd7; 6.e3 0-0; 7.Qc2 c5!?;

It's maybe a little early for this; 7...h6 or 7...c6 are probably both more dependable.

8.cxd5 Nxd5; 9.Nxd5 Bxg5; 10.h4! Qa5+?;

Better is 10...Bh6!∞, Black could also take on d5.

11.b4!! cxb4?; (Maybe - '??')

[Better is 11...Qe7, to prevent Ne7#, as in the game - now, it is a forced mate in three. Black (obviously) did not see this.]

12.Qxh7+! Kxh7; 13.hxg5+ Kg6;

(Or 13...Kg8; 14.Ne7#.)

14.Ne7# 1-0

click for larger view

11.b4!! Very nice.

Jul-11-12  e4 resigns: I saw the king chase, Qxh7, but missed the most accurate win: 14.Nf4 15.Be3 16.Rh4.
I was startled when
It seems there are many ways to win against non-resigners. Maybe 14.Nh4 would be the funniest.
14...Kxf5 then 15.f4+ 16.Be2 17.Rh3#
14...Kh5 15.Be2 Kxg5 16.f4 Kh6 17.Nf5 Kg6 18.Nfe7#.
This is far more amusing then the simple mate, and your opponent would marvel more, (if he himself didn't see the simple 14.Ne7!) I don't think 11.b4 should have "!!" though. It is simple to spot, although a nice move. Now black's game cannot be saved. <[Better is 11...Qe7, to prevent Ne7#, as in the game - now, it is a forced mate in three. Black (obviously) did not see this.]> Probably a typo, since Qa5 cannot go to Qe7.
Apr-12-16  edubueno: 9...Axg5 is the first mistake, Piazzini should have played exd5.
Premium Chessgames Member
  plang: Very pretty trap
Oct-15-19  Cibator: Gerald Abrahams discusses this game in one of his books - I forget for now which one - and gives an insight into the likely reasons for Black's choice of moves. I'll try to dig up the reference.
Premium Chessgames Member
  GrahamClayton: Nice variation on the "Greek Gift" theme, with the Queen instead of a bishop being sacrificed on h7.
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