BBO Discussion Forums: Question about dealer advanced grammar of tricks() expression. - BBO Discussion Forums

Hi! I'm learning dealer grammar recently, and find "tricks()" expression very useful, especially when I want to generate some hands that NS surely have a game to play.
In the document, it is described as

Quote

However, I couldn't find the word "strain" anywhere else in the document. I also looked through Examples.zip and found nothing, sadly.

I tried "tricks(north, notrump)>=7", "tricks(north, notrumps) >= 7", "tricks(north, spade) >= 7", "tricks(north, spades) >= 7", "tricks(north, 1s) >= 7", "tricks(north, x1s) >= 7" etc. None of these works. Error message returns immediately, not as those almost impossible ones like "hcp(north) == 40" which uses up the trial limitation. Most likely there is a syntax error, or the environment (as described in the document) on the server is incorrect.

Can anyone help?

strain is a suit name or notrump(s)

But this function is currently not supported by us in our current setup.

Gerardo, on 2019-August-11, 09:12, said:

I see, thanks. Hope this feature to be supported in the future.

zjuwyz, on 2019-August-12, 04:30, said:

This is the first time anyone has even mentioned it, as far as I know.

The best forum for this kind of topic is
Full disclosure and Dealer

This version of Dealer no longer seems to work
Dealer + GIB -- version that supports tricks function

Using that version, you could run a script like...

/** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
tricks.ds. 19 Oct 2017. NG
Trick expectation at double-dummy.
Script for Dealer by Hans van Staveren & Henk Uijterwaal
http://dealergib1.bridgebase.com/tools/dealer/dealer.php
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** **/
predeal east SQT32, HQ932, D864, CA9

# 1N opener
ntHCP = 16
wHCP = hcp (west)
w1N =
(shape (west, any 4333 + any 4432) and 
 ntHCP - 2 < wHCP and wHCP < ntHCP + 2) or
(shape (west, any 5332 + any 5422 + any 6322
 - 5422 - 4522 - 6xxx - x6xx) and
 ntHCP - 2 < wHCP and wHCP < ntHCP + 1)

produce 100
condition w1N
frequency "NT tricks, West" (tricks (west, notrump), 8, 9),

This avoided the need to install your own version of Dealer and Gib.

tricks() works there.

Had to add "action" on its own line before frequency.

That generates just the frequency though, no hans are shown.

Gerardo, on 2019-August-13, 18:19, said:

Thank you Gerardo, It worked before but I didn't include the "action" verb in my example above, which should be ...

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
tricks.ds. 14 Aug 2019. NG
Trick expectation at double-dummy.
Script for Dealer by Hans van Staveren & Henk Uijterwaal
[url="http://dealergib1.bridgebase.com/tools/dealer/dealer.php"]http://dealergib1.br...aler/dealer.php[/url]
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** **/
predeal east SQT32, HQ932, D864, CA9

# 1N opener
ntHCP = 16
wHCP = hcp (west)
w1N =
(shape (west, any 4333 + any 4432) and 
 ntHCP - 2 < wHCP and wHCP < ntHCP + 2) or
(shape (west, any 5332 + any 5422 + any 6322
 - 5422 - 4522 - 6xxx - x6xx) and
 ntHCP - 2 < wHCP and wHCP < ntHCP + 1)

produce 100
condition w1N
action frequency "NT tricks, West" (tricks (west, notrump), 8, 9),

The output of this script is

Frequency NT tricks, West:
 Low          38 
      8          38 
      9          20
High            4
Generated 1296 hands
Produced 	100 hands
Initial random seed 1565783392 
Time needed    4.395 sec

You can also use "printall" or whatever to display the relevant hands.