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Paul Keres vs Laszlo Szabo
"Cash-in Keres" (game of the day Nov-11-2006)
HUN-URS (1955), Budapest HUN, rd 3, May-??
Sicilian Defense: Richter-Rauzer. Classical Variation (B64)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jul-09-15
Premium Chessgames Member
  thegoodanarchist: < AylerKupp> OK, I thought Houdini was available for free. But still, today's free Stockfish would defeat ANY regular PC engine from 2006.
Jul-09-15
Premium Chessgames Member
  AylerKupp: <thegoodanarchist> Houdini 1.5a is still available for free, but that was released in 2011. However, Houdini 1.5a, rated at 3199, is still one of the top engines, being ranked joint 4th with Fire 4, Houdini 2.0c, and Stockfish 5 in the latest CCRL 40/40 tournament, with only 18 engines ahead of it. Which is not bad, considering that there were over 1,600 engines in the tournament. It is ranked 25th in the latest CEGT 40/20 tournament. So clearly it is a great value.

But you're quite right about Stockfish. It's rated 3310 in the CCRL and the highest rated engine in Oct-2010 when I started to track these things was Rybka 3 which was rated at 3149. The 161-point rating differential between Stockfish 6 and Rybka 3 translates to a P(Win) of 0.71 for Stockfish and a most likely score of 17 7 if they played a 24-game match until the end, or a 12 - 5 if the match was stopped when the first engine reached more than 12 points. Quite decisive.

Of course, these are the statistically most likely scores. What the actual scores would be is anyone's guess.

Jun-26-16  The Kings Domain: The art of the attack.
Oct-19-16
Premium Chessgames Member
  al wazir: Easy.

The key move, of course was 18. Rxd7 four moves back, sacrificing the exchange. That wasn't easy. Keres must have had this continuation in mind.

Oct-19-16
Premium Chessgames Member
  agb2002: White has a knight for a rook.

White can exploit the defenseless position of the black king with 21.Rxg7:

A) 21... Kxg7 22.Qf6+

A.1) 22... Kf8 23.Bg6 Kg8 (23... Re7 24.Qh8#) 24.Qxf7+ Kh8 25.Qh7#.

A.2) 22... Kg8 23.Qxh6

A.2.a) 23... Qxe5 24.Bh7+ Kh8 25.Bg6+ Kg8 26.Qh7+ Kf8 27.Qxf7#.

A.2.b) 23... f5 24.exf6 Re7 (24... Kf7 25.Qg7#) 25.fxe7 Kf7 (due to 26.Qh7#) 26.Qf4+ Kxe7 27.Qxb8 + - [N+2P].

A.2.c) 23... Re7 24.Qh7+ Kf8 25.Qh8#.

B) 21... Re7 22.Qxh6 Ree8 (else 23.Qh8#) 23.Rg8+ Kxg8 (23... Ke7 24.Qf6#) 24.Bh7+ Kh8 25.Bg6+ Kg8 26.Qh7+ Kf8 27.Qxf7#.

C) 21... Ke7 22.Qxf7+ Kd8 23.Qxd7#.

D) 21... f5 22.Qxh6 and 23.Qh8#.

Oct-19-16
Premium Chessgames Member
  YouRang: Wednesday 21.?


click for larger view

My instincts directed me to go for <21.Bg6>, which turned out to be a mild misadventure...


click for larger view

Obviously threatening mate and black can't capture the bishop nor push the f-pawn. I imagined that black's king would make a run for it: 21...Ke7 22.Qxf7+ Kd8 23.Rd3 and black is ruined.

I did consider the "stay put" defense of <21...Re7>, but I thought that <22.Qf6! gxf6 23.Bh7> would be mate.


click for larger view

With Rg8# looming, black needs <23...Ree8> make escape square at e7 <24.exf6> plugging e7. Alas, not as mating as I thought since black has 24...Qg5+, which amounts to white winning the exchange.

Of course 22...gxf6 is a mistake, but I had in my head that white would still be crushing after 23.Bh7. The engine tells me that white is only a little better after 22...Qb4. Oh well, 21.Rxg7! was much better.

Oct-19-16
Premium Chessgames Member
  patzer2: Perhaps my memory hasn't completely failed me as a senior citizen. Even though I didn't recall posting about this game in 2004, I instantly and instinctively went for 21. Rxg7! for today's Wednesday puzzle solution.

However, in the follow-up, instead of immediately playing 23. Bg6 , I interposed to arrive at almost the same winning position with 23. Qxh6+ Ke7 24. Qf6+ Kf8 25. Bg6 . The only difference being that I'm up an extra, albeit unnecessary, pawn in my line.

P.S.: My 7-year-old Grandson of late seems to have few problems in quickly recalling mating patterns and combinations. Tuesday night he called me to say he did very well in a USCF rated blitz tournament in Waco, Texas in beating two 1300 plus rated players and drawing with a 1700 plus rated player in five rounds of play.

Oct-19-16  Aunt Jemima: What about 22. Kg8?
Oct-19-16  JohnDMaster: No credit for me, I know this game very well. I could go back to Rxd7! removing a potential defender
Oct-19-16  Skewbrow: I consider myself a bit lucky to find this one. First I contemplated 21.Bg6 with the mate threat, but 21... Re7 defends, and the bishop is now standing in the way of my heavy artillery (I missed the nice attack of YouRang). The second germ of an idea was to begin with 21.Rxg7. If Black takes, then at least perpetual with the queen is there: 21...Kxg7, 22. Qf6+ Kf8, 23. Qh8+ Ke7, 24 Qf6+ (nice that Black's own pieces occupy the squares d7 and e8 blocking King's escape routes!). Finally I realized that instead of perpetually checking White can bring in the bishop as a reinforcement, and force a mate. All thanks to those blocking black pieces that give white an extra tempo. Some possible continuations to 21. Rxg7 Kxg7, 22. Qf6+ are:

22... Kf8 23. Bg6 Re7 24. Qh8X

22... Kg8 23. Qxh6 Qxe5 25. Bh7+ Kh8 26. Bg6+ Kg8 27. Qh7 Kf8 28. Qf7X (all forced)

Oct-19-16  cromat: <Aunt Jemima>: for 22...Kg8 u have A.2) 22... Kg8 23.Qxh6

A.2.a) 23... Qxe5 24.Bh7+ Kh8 25.Bg6+ Kg8 26.Qh7+ Kf8 27.Qxf7#.

A.2.b) 23... f5 24.exf6 Re7 (24... Kf7 25.Qg7#) 25.fxe7 Kf7 (due to 26.Qh7#) 26.Qf4+ Kxe7 27.Qxb8 + - [N+2P].

A.2.c) 23... Re7 24.Qh7+ Kf8 25.Qh8#.

Oct-19-16  Abdel Irada: ∞

<<+> Fustest With The Leastest? <+>>

White has already sacced an exchange, so he has a material deficit. But as the proverb has it, "Sometimes the remedy for poverty is more expense."

<<+> 21. Rxg7! ... >

If Black accepts this sacrifice, we'll be down two rooks for a knight, and since the knight's too slow (and tied down anyway to prevent mate with ... Qe1), this leaves us a queen and a bishop to attack with. But so lonely is Black's king that this is enough.

<<+> 21. ...Kxg7 >

Well, of course, Black *has* to accept. If he declines, he must defend f7, and that means <21. ...Re7 22. Qxh6 >, when the king has no escape.

<<+> 22. Qf6+, Kg8 >

Black can also try <22. ...Kf8>, but this fails against <23. Bg6, Re7▢ 24. Qh8#>

<<+> 23. Qxh6 ... >

Now White threatens mate in three: <24. Bh7+, Kh8▢ 25. Bg6+, Kg8▢ 26. Qh7+, Kf8▢ 27. Qxf7#>

<<+> 23. ...f5 >

This is effectively the only move. Pawn-grabbing with <23. ...Qxe5?> does nothing to stop the mate.

<<+> 24. exf6, Re7▢
25. fxe7, Qf5▢
26. Bxf5, exf5▢
27. Qg6+, Kh8▢
28. Qd6 >

With a crushing material advantage, White now wins easily.

Oct-19-16  fokers13: Does 21.Bg6 Re7 22.Bh7 threatening Qxh6 work?

Black's king seems so boxed in that even that requires contemplation

Oct-19-16
Premium Chessgames Member
  patzer2: Looking for a Black improvement, I see the opening move 9...a6?! has been justly condemned here.

For an improvement, I like the more popular move 9...a6 as in D Andreikin vs Smirin, 2016 or, to a lesser extent, the most popular move 9...Nxd5 as in Navara vs Jobava, 2016.

Oct-19-16  Abdel Irada: ∞

<patzer2: Looking for a Black improvement, I see the opening move 9...a6?! has been justly condemned here.

For an improvement, I like the more popular move 9...a6 ....>

So, as an improvement over 9. ...a6, you recommend 9. ...a6.

Well, *I* think Black could have improved even earlier, by playing 1. ...c5 instead of the plainly inferior 1. ...c5.

Oct-19-16
Premium Chessgames Member
  kevin86: The rook sac goes for Black's throat! Black can prevent mate at the end by allowing...mate.
Oct-19-16
Premium Chessgames Member
  gawain: I tried 21 Rxg7 and 22 Qf6+ --and still failed to see 23 Bg6.
Oct-19-16  drollere: very nice. Re7, the only saving move, allows Qh8#.
Oct-19-16
Premium Chessgames Member
  swclark25: would 21)...Re7 protect f7 and let Black wriggle off the hook?
Oct-19-16
Premium Chessgames Member
  ajile: 18.Rxd7! envisions a fatal future weakness on f6.
Oct-19-16
Premium Chessgames Member
  patzer2: <AI> My apologies. I meant to say I preferred 9...h6 as played in D Andreikin vs Smirin, 2016.
Oct-19-16
Premium Chessgames Member
  OhioChessFan: <swc: would 21)...Re7 protect f7 and let Black wriggle off the hook?>

White would play 22. Qxh6 and Black would be helpless to stop Qh8#

Jan-25-17  maimoun: i like this amazing line writed by yourang

21. Bg6 Re7 22. Qf6 gxf6 23. Bh7 Ree8 24. exf6 Qg5+ 25. hxg5 hxg5 26. Rxg5 e5 27. Rg8+ #

Jul-27-17  Toribio3: Keres is one of the best grandmaster of the world that did not hold the position of a world champion.
Jul-27-17  sudoplatov: When designing one of the evaluation functions for LACHEX, in particular, the root position move-chooser (used for ranking moves only), I did try something like Keres' strategy here. Based on Fischer's comments that Alekhine tended to push pieces to the center then towards the enemy King, I tried the following. I added to any move, a tropism towards the center and another term towards the enemy King. This tropism was constructed so that moving from 4 squares distance to 3 was a bit better than moving from 3 squares distance to 2. The idea was to "mobilize the reserves" so as to prevent attacks with inadequate material.

The other evaluation function evaluated positions rather than moves and was used in the search itself rather than to rank moves.

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