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Berthold Koch vs Jaroslav Jezek
2nd World Correspondence Chess Championship (1956) (correspondence), Jan-01
Dutch Defense: Blackburne Variation (A81)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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May-25-16
Premium Chessgames Member
  patzer2: For today's Wednesday solution, like <BXChess>, I also picked 31. Rxh7+ Rxh7 32. Nxh7 which wins with a Queen Fork (double attack) after 32...Qxh7 33. Qf6+ (#10, Deep Fritz 15).

A pretty side line after 32. Nxh7 is 32...Rg8 33. Qh6! Qg7 34. Qxd6! (+14.06 @ 19 depth, Deep Fritz 15).

However, the computers rate 32. Rh1! (#10, Deep Fritz 15) as the strongest winning choice. I'd also give it first place on style points as it's a clever surprise winning continuation which I completely missed.

Hard to find improvements in this World correspondence championship game. Perhaps the computer choice 9...e5 10. Nxf6 Bxf6 = to (0.30 @ 26 depth, Komodo 9.3) would have been better for Black.

May-25-16  stst: Superbly configured, very interesting!!
Need to know when to pause a little bit...not continuing pounding...

31.Rxh7+ (to start the ball rolling) Rxh7 (only move) 32.Rh1 (right here, not Qxh7, or the ammunition will soon be exhausted) Black almost run out any effective defense, pending mate next, BUT...Rxh1 to give it a try to delay.... 33.Kxh1, then nothing helps:

...Qf1 ==> 34.Qh7#
...Qh7 ==> 34.QxQ#
...QxN ==> 34.QxQ+ and the R lost

see how they rolled?!

May-25-16  diagonalley: <patzer2> yep... i got the same line as you suggested
May-25-16  stst: <I spoiled myself by already looking at the solution before even solving it.>

The current setup (at least for me) is, in order to post my take, I am forced to click on the diagram but led to the page where ALL others have already posted their answers/comments/kibitz stuff. So everytime I simply force myself to close my eyes and go straight to this little corner and just focus to type in my 2 cents!! ===> A pseudo-way to train for honesty, I guess?!?

CG may have a much better tech-solution (i.e. simply move this typing space right below the front-page diagram, and only after posting it the kibitzer is allowed to get onto the forum!!

May-25-16  gofer: <Tweasy: Rook reloader>... ...much easier than yesterday!
May-25-16  mistreaver: Wednsday. White to play. 31.= Medium/Easy.
At first f5 comes to mind.
31 f5 Rxg6
32 fxg6 Kg7
33 Rxh7+ Kf8
34 Rxe7 Kxe7
35 g7.
But can black ignore the queen?
say
31 f5 exd4
32 Rh6
and with the threat of doubling i think he cannot.
Taking on h7 doesn't bring anything as far as i can see. Time to check.
----------------
Wow, missed the whole point. f5 is still better for white, but not as nowhere clear cut. Bonus for creativity?
May-25-16  wooden nickel: White to play in move 30 was also nice:


click for larger view

31.Nxh7 fails slightly however 31.Qxh7 might get tough for Black i.e.

31.Qxh7+ Rxh7 32.Rxh7+ Qxh7 33.Nxh7 Kxh7 34.dxe5


click for larger view

May-25-16
Premium Chessgames Member
  morfishine: Monster Knight

<31.Rxh7+> and Black King is left cornered like a rat after 31...Rxh7 32.Rh1

May-25-16  CHESSTTCAMPS: White is up a pawn, with an overpowering attack on h7 thanks to the semi-open h-file, the perfectly placed knight, and the invading queen. Black threatens 31... RxQ, but white can easily brush this aside with 31.Rxh7+! Rxh7 34.Rh1! Rxh1 35.Kxh1! wins. Remarkable that there is time for a quiet move when a rook down in the middle of a forcing combination, but black's rook and knight are useless defenders.

Now black can't stop a quick mate e.g. 35... Qg7 (otherwise 36.Qh6+ forces mate) 36.Qh5+ and mate next.

May-25-16
Premium Chessgames Member
  Sally Simpson: Hi Chaps,

I went off onto cloud cuckoo land on this one. (though I still win.)

1.Rxh7+ Rxh7 2.Nxh7 (2...Qxh7 meets 3.Qf6+)


click for larger view

2...Rg8 3.Qh6 Qxh7 4.Qf6+ Rg7 5.Rh1


click for larger view

And Wins. Tucked in there is a half dovetail mate.

5...Nd8 6.Qf8+ Rg8 7.Rxh7+ Kxh7 Qh6 mate.


click for larger view

And I thought it was going to go along those lines.

But 2.Rh1 is better. Much better.

I seek solace in the fact I would have won and this was a correspondence game so White could look at all the cute shots in this position without dreaded enemy No1. (father time) breathing down their neck.

Over the board winning variations based on the above line is how it would have continued on the cabbage patch boards where I strut my stuff

Of course White probably used a computer.

And before some slack jaw posts we never had computers in 1956 then let me tell you that we did. We all had home computers running 'Botvinnik II' (what ever happened to that program.) The government took all our computers of us during the Suez Crisis.

We never got them back. I still have the receipt. I bet this lad hid his in the attic.

(the obvious flaw in my clutching at straws excuse is that I too had all the time the world to look at it properly....)

Good game. Smashing puzzle.

May-25-16
Premium Chessgames Member
  thegoodanarchist: <Penguincw: ...

But yes, I agree with what <lentil> said. Gotta love it when puzzles end with "quiet moves".>

I'm not happy about it.

May-25-16  dfcx: The focus is on the black pawn in front of the king. Black king is already stalemated, so white has time to bring in more troops, if only he can get rid of the rook attacking his queen.

31.Rxh7+ Rxh7
32.Rh1 Rxh1+
33.Kxh1

Now Qh6+ is unstoppable, so only way for black to save mate is

33....Qxf6
34.Qxf6+ followed by Qxd8

May-25-16  mel gibson: This is harder than it looks.
Black quickly loses the Queen & a Rook.
May-25-16
Premium Chessgames Member
  steinitzfan: Good puzzle. It looks like the attack should fizzle out after the rook exchange. But it doesn't.
May-25-16  drollere: i went with
32. Nxh7 Qxh7
33. Qf6+ Kg8 (or Qg7)
34. Qxd8+
and the mop up with passed pawns is easy.
May-25-16
Premium Chessgames Member
  kevin86: The pressure alone is enough for black to be snowed under.
May-25-16  Nosnibor: I managed to solve this by sight within 30 seconds. White`s control of the h file is awesome.
May-25-16
Premium Chessgames Member
  morfishine: <Sally Simpson> Enjoyable, nice post :)
May-25-16  YouRang: This one took me a long time due to chess blindness.

Right away I looked at <31.Rxh7+ Rxh7>. Seeing nothing, I even considered <32. Rh1 Rxh1 33.Kxh1>, but still didn't see it!


click for larger view

I saw that white had two obvious mate threats with Qg8 and Qh7, but both of those threats were guarded against by black's R and Q.

What I had failed to see from move 31 was white's *third* mate threat at Qh6+! Black's only "defense" against that is to block with ...Qh7, which merely makes Qh7# possible.

So, after 33.Kxh1, Black cannot stop all three mate threats. Black can try 33...Qg7:


click for larger view

And this guards against Qh6+, but it also seals off the g7 escape square, allowing white to win with 34.Qh5+! Black has a choice of ...Qh7 Qxh7# or ...Qh6 Qxh6#.

So, Black is left with 33...Qxf6 34.Qxf6+ Kg8 35.Qxd8+ Kf7 36.Qxc7+:


click for larger view

But resignation was actually the less painful option.

May-25-16
Premium Chessgames Member
  OhioChessFan: I was surprisingly blind too. 33...Qg7 34. Qh5+ was where I had trouble.
May-25-16  Tiggler: <Sally Simpson> My 1956 computer said that 32. Nxh7 wins. My 2016 computer agrees. 32. Rh1 is aesthetically better, but my computers don't know or care about that.
May-25-16
Premium Chessgames Member
  Sally Simpson: Hi Tiggler,

If your '56 model likes 32.Nxh7 then maybe Berthold did not have one.

I still hanker after mine.

OK they were the size of a small caravan and sometimes they blew up taking half the street with it but I liked the high pitched whine it made when it was thinking.

I still have the anti-glare goggles and radiation suit you had to wear when using it.

May-26-16  RoyalPawn: No doubt 32.Rh1 is the beauty of the combination, but for me the key is the protected knight posted on f6. Without this, the pretty sacrifice is not possible. Great play to get a great post for the cavalry, there is simply not enough defence with black's knight and 2nd rook out of play.

Additionally, really hard to see Qh5+ if 33..Qg7 from the beginning of the combination, you wouldn't sacrifice that rook OTB if you do not see this.

May-26-16
Premium Chessgames Member
  thegoodanarchist: < YouRang: This one took me a long time due to chess blindness.

Right away I looked at <31.Rxh7+ Rxh7>. Seeing nothing, I even considered <32. Rh1 Rxh1 33.Kxh1>, but still didn't see it!

I saw that white had two obvious mate threats with Qg8 and Qh7, but both of those threats were guarded against by black's R and Q.

What I had failed to see from move 31 was white's *third* mate threat at Qh6+! Black's only "defense" against that is to block with ...Qh7, which merely makes Qh7# possible.

So, after 33.Kxh1, Black cannot stop all three mate threats. Black can try 33...Qg7:

And this guards against Qh6+, but it also seals off the g7 escape square, allowing white to win with 34.Qh5+! Black has a choice of ...Qh7 Qxh7# or ...Qh6 Qxh6#.

So, Black is left with 33...Qxf6 34.Qxf6+ Kg8 35.Qxd8+ Kf7 36.Qxc7+:

But resignation was actually the less painful option.>

What he said.

May-26-16
Premium Chessgames Member
  thegoodanarchist: <Sally Simpson: Hi Chaps,

I went off onto cloud cuckoo land on this one>

What's the weather like there?

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