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Zar points application in competitive bidding

#1cnszsun

• Group: Yellows
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• Location:CHINA

Posted 2004-June-01, 21:50

I have started to use ZAR points for hand evalution. I have to say it's very useful, i think one important factor leading to Zar's success is its simplicity especially on opening judgement, but i have one question here, can the same simple rule be applied to overcaller. Now when i overcall at one level, i may have 9-16 or even wider HCP range. How to use zar points here? Anyone has some thoughts? I know this may not be important to expert players, you all have your own judgement and evaluation system based on your experiences. But for average level players, some simple guideline here seems useful.
Michael Sun

#2Zar

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• Joined: 2004-April-03

Posted 2004-June-30, 20:18

Hi, Mike:

This thread was staying kind-of "aside" from the main Zar Points threads.

I am using it now to post the numbers for the probablities in the ranges of Zar Points for the 2 hands of the partnership once the OPPONENTS have opened, which means we are in the competitive bidding zone.

The formal condition we use for the purposes of this research is that the Left-hand-opponent has 12 HCP (standard-opening).

Have a look at the numbers below in the next posting.

Hope that helps. Let me know if you need any elaboration in any direction.

Cheers:

ZAR
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#3Zar

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Posted 2004-June-30, 20:25

Zar, on Jun 30 2004, 09:18 PM, said:

Ok:

Here are the defensive bidding numbers, AFTER THE OPPONENTS HAVE OPENED - that is the RHO HAS 12+ hcp (FOR THE PURPOSES OF THIS RESEARCH).

====================== ZAR POINTS (plain) OVERCALLER RUN =======================

RAW COUNT        ------- Overcaller's Partner's Range ---------
Overcaller Range  10-    11-15  16-20  21-25  26-30    31+
----------------  -----  -----  -----  -----  -----  -----
26 - 30        512    7599  21856  22233  10072    1079
31 - 35        329    3949    8179    5604    1946    144
36 - 40        117    1274    1952      965      201      13
41 - 45          19    165    173        59        11        1
46 - 50            1      10        5          1          0        0
51 - 55            0        1        0          0          0        0

PERCENTAGE'S    ------- Overcaller's Partner's Range ---------
Overcaller Range  10-    11-15  16-20  21-25  26-30    31+
---------------  -----  -----  -----  -----  -----  -----
26 - 30      0.20    3.04    8.74    8.89    4.03    0.43
31 - 35      0.13    1.58    3.27    2.24    0.78    0.06
36 - 40      0.05    0.51    0.78    0.39    0.08    0.01
41 - 45      0.01    0.07    0.07    0.02    0.00    0.00
46 - 50      0.00    0.00    0.00    0.00    0.00    0.00
51 - 55      0.00    0.00    0.00    0.00    0.00    0.00
56 - 60      0.00    0.00    0.00    0.00    0.00    0.00

Opener's Range  Game 52+              Small Slam 62+    Grand Slam 67+
--------------    ----------    --------------    --------------
26 - 30              30348    12.14    2431    0.972      327  0.131
31 - 35                6752      2.70      314    0.126        17  0.007
36 - 40                989        0.40      25      0.010        4  0.002
41 - 45                  60        0.02        2      0.001        0  0.000
46 - 50                    0        0.00        0      0.000        0  0.000
51 - 55                    0        0.00        0      0.000        0  0.000
----------      ------------      ------------
38149  15.3    2772  1.1        348  0.15  = 41269
16.5%

Compared to the case when WE open, the numbers for Game + Slam + Grand were 20.5% against 16.5% if the opponents have opened (meaning 12 HCP+ in this study).

====================== ZAR POINTS (+ fit) OVERCALLER RUN =======================

RAW COUNT        ------- Overcaller's Partner's Range ---------
Overcaller Range  10-    11-15  16-20  21-25  26-30    31+
----------------  -----  -----  -----  -----  -----  -----
26 - 30        427    6335  19103  22258  12492    3094
31 - 35        282    3688    8950    8092    3675    617
36 - 40        119    1555    3183    2240    836      96
41 - 45          34    429    716    425    136      13
46 - 50          10      63    107      54      13      1
51 - 55          0      5      7      2      1      0

PERCENTAGE'S    ------- Overcaller's Partner's Range ---------
Overcaller Range  10-    11-15  16-20  21-25  26-30    31+
---------------  -----  -----  -----  -----  -----  -----
26 - 30      0.17    2.53    7.64    8.90    5.00    1.24
31 - 35      0.11    1.48    3.58    3.24    1.47    0.25
36 - 40      0.05    0.62    1.27    0.90    0.33    0.04
41 - 45      0.01    0.17    0.29    0.17    0.05    0.01
46 - 50      0.00    0.03    0.04    0.02    0.01    0.00
51 - 55      0.00    0.00    0.00    0.00    0.00    0.00
56 - 60      0.00    0.00    0.00    0.00    0.00    0.00

Opener's Range      Game 52+    Small Slam 62+    Grand Slam 67+
--------------    ----------    --------------    --------------
26 - 30      30967  12.39    5327  2.131      2472  0.989
31 - 35      10650  4.26    1560  0.624      622  0.249
36 - 40        3027  1.21      409  0.164      202  0.081
41 - 45        632  0.25      110  0.044        53  0.021
46 - 50          99  0.04      14  0.006        17  0.007
51 - 55          7  0.00        2  0.001        0  0.000
----------      ------------      ------------
45382  18.15    7422  2.97      3367  1.35  = 56171
22.5%

Compared to the case when WE open, the numbers for Game + Slam + Grand were 20.5% against 16.5% if the opponents have opened (meaning 12 HCP+ in this study) and we count only plain Zar Points, against 22.5% if we count fit points.

Offensive bidding numbers are posted in the main Zar Points thread Zar Points -  useful or waste of energy.

Cheers:

ZAR

Well .... here are the numbers for competitive biding in quotes.

Hope it is readabale - this Forum-editor software makes me feel I have never seen a computer before :-)

Cheers:

ZAR
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#4inquiry

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Posted 2004-July-01, 06:24

Zar, on Jun 30 2004, 10:25 PM, said:

Hope it is readabale - this Forum-editor software makes me feel I have never seen a computer before :-)

Hehehehe... It is a pain to work with. If you are cutting and pasting from excel or something, don't use tabs to separate columns. You have to pad with spaces to get everything to line up correcly. (now, don't ask me how to do that, for I do it manually myself, and you post too much for that). I am enjoying reading this new stuff, thanks.

Ben
--Ben--

#5Trpltrbl

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Posted 2004-July-01, 16:17

I like ZARpoints in offensive suitbidding.
But as for NT and overcalling, I still use "regular" HCP till we have found fit and start adjusting accordingly. It seems to be working.

Mike
“If there is dissatisfaction with the status quo, good. If there is ferment,
so much the better. If there is restlessness, I am pleased. Then let there
be ideas, and hard thought, and hard work.”
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