The Lewis Class System
The Lewis Class system can be used for calculating winners of an event (forawards), or winners of the Lewis Purse (money). The normal Rules for Lewis
system are as follows:
1. When all shooting is completed, list all scores in descending score order.
2. They are then divided into as many groups as are dictated. Methods are:
• A preset number of groups – regardless of entry amount.
• A computed group amount, for example: 1 group for every 10 entries.
3. Since there will often be an odd number of entries and tie scores on theoriginal dividing lines between the groups, the following rules have been
established:• Where a short group is necessary due to an odd entry list, the shortgroup (or groups) will always be the upper group(s).
• When an original line is drawn between a number of tied scores, thecontestants are re-assigned to the group in which the Majority of scoresappear.
• Where an EQUAL number of ties scores appear on either side of theoriginal line, contestants are assigned to the head of the lower group.
• If contestants are re-assigned to other groups due to tied scores between
original lines, ONLY those groups are affected. The original lines in othergroups remain. All money in groups will stay intact, regardless of any reassignment to another group.

On the next page we will see how these rules can be applied to an example shoot.
The algorithms are listed so that you can create Macros in spreadsheets, orprogram lines of code into software you have developed.

Variables needed:
For our example, the following Data is provided:
Total Entries = 32
Number of Groups = 5
Lewis Class Price = $10.00

Determining Original Lines & Amounts:
In Order to draw your original lines, you will need to compute other variables which willaid in determining original group sizes and monies.

1) Compute Total Money$ 320= Total Entries x Lewis Class Price=32x102) Compute Group Money = Total Money / Number of Groups$ 64=$320/53) Compute Base Numbers = Total Entries / Number of Groups
6.4=32/54)

Which Creates:

Whole Base Number = 6
Remainder Base Number = 0.4

Now Compute:

Add Rest = (Remainder Base Number * 10) / 22=(.04 * 10) / 2At this point, we need to initialize the Basic size of each group, which in ourexample, is 6 and is contained in Whole Base Number. Any group which should
be larger because of the odd number of entries will be increased using theRemainder Base Number.
Move Whole Base Number of 6 to All Group Entry Counters (1 thru 5)

Now increase the entries of the Lower groups according to the rules by using the Add
Rest Variable:
••
•
•
•

If Add Rest = 0, then do not add to any Group Entries, Split is perfect.
If Add Rest = 1, then Add 1 to Group 5 entry counter
If Add Rest = 2, then Add 1 to Group 4 thru Group 5 entry counter
If Add Rest = 3, then Add 1 to Group 3 thru Group 5 entry counter
If Add Rest = 4, then Add 1 to Group 2 thru Group 5 entry counter
NOTE: The Add Rest variable will never be more than (Number of Groups – 1)

5) In our example, Add Rest was equal to 2, so the groups are now originally drawn withthe following amount of Entries

Group 1Group 2Group 3

Group 4

Group 5Name
JimJanJohn
TerryEricSusie

Score
1009999
9896
96(6 entries)

DollyMikeSamDanaJoshua
Janie959594949393(6 entries)

DebbieLucyPatty
Zelda
GeorgePaul

939292919190(6 entries)

Rita
OfeliaPamelaGreg
Art
OlgaJoseph

90
9090
89
89
8885

(7 entries)

Mary
Will
Lee
Renee
Jonathon
Lisa
Bart

85
84
80
79
75
7470

(7 entries(Adjusting GroupsNow that you have drawn your original lines, you must look at the scores on either side of thelines to determine whether or not contestants will remain in that group, or move to anothergroup. The following table shows the results of applying the last few Lewis class rules.
Note that the Original lines are still shown, but contestants have been shifted.

Group 1NameJim
JanJohn
Terry
Eric
Susie

Score
10099
99
98
9696
95
95
94
94
93
93
93

Co-Winner Group 2 - $32.00
Co-Winner Group 2 - $32.00

Group 2

Dolly
Mike
Sam
Dana
JoshuaJanie
DebbieLucyPatty
Zelda
George

92
92
91
91

Co-Winner Group 3 - $32.00
Co-Winner Group 3 - $32.00

After Debbie moved to Group 2
Lucy and Patty now head Group
Group 3 with 92’s

Paul
Rita
OfeliaPamelaGreg
ArtOlga90
90
90
90
89
89
88

Co-Winner Group 4 - $16.00
Co-Winner Group 4 - $16.00
Co-Winner Group 4 - $16.00
Co-Winner Group 4 - $16.00

Paul moves from the bottom ofGroup 3 to the head of Group 4to Join the majority of 90’s

JosephMaryWillLee
ReneeJonathon
Lisa
Bart

85
85
84
80
7975
74
70

Co-Winner Group 5 - $32.00
Co-Winner Group 5 - $32.00

Joseph now heads Group 5. TheRules state that if there is thesame number of alike scores,
then Joseph moves down tohead the next group.

Group 3Group 4Group 5

Winner Group 1 - $64.00

Note that Debbie headed to Group 3, but because of Joshua &Janie’s 93’s, Debbie moved to where the Majority was.

Figure 1 – Class Purse

Figure 3 – Lewis Class Purse

High Gun – 3 places per Class – Split 50/30/20

High Gun – 3 places per class – Split 50/30/20
22 Entries (@ $10 ea) - $220.00 – 3 classes - $73.34/classClass A - 23 entries (@ $10 ea) - $230.00

Situation 1:

Score Payout % Split
John Dansforth 96 $115.00 (50%)
Eric Johnson
95$69.00 (30%)
Jim Quentin
94$23.00 (10%) The Last Place (20%) is split
Kim Neeman
94$23.00 (10%) evenly amongst the 94’s.

Situation 2: Score
John Dansforth 100Eric Johnson
100
Jim Quentin
100
Kim Neeman
100

Payout$57.50$57.50$57.50$57.50Class 1% Split(25%) All three places to be paid(25%) (50% + 30% + 20%) are(25%) consumed and evenly split(25%) amongst the 100’s

Class 2

The following example IS NOT figured using the High Gun System
Situation 3: Score Payout % Split
John Dansforth 100 $115.00 (50%) All 99’s evenly split the 30%
Eric Johnson
99$17.25 (7.5%) portion of the money.
Jim Quentin
99$17.25 (7.5%)
Kim Neeman
99$17.25 (7.5%) This lone 98 took the entire
John McMahon 99$17.25 (7.5%) 20% place, thereby actually
Betty Hines
98$46.00(25%) winning more than the 99’s

Class 3Figure 2 – Oklahoma Options (50’s)

Eric Johnson
100 $36.67 (50%)
John Dansforth 99$9.17 (12.5%)
Kim Neeman
99$9.17 (12.5%)
Dave Johnson
99 $9.17 (12.5%)
John McMahon 99 $9.17 (12.5%)
Jim Quentin
98
Betty Hines
98
Beth Carter
98
John Allen
97
Jane Foust
97
Mark Davidson 97
Jim Beckham
96
Judy McMahon
Dana Nemeth
Sam Mauer
Bart McGregor
Carl Hines
Diana Rosen
Mike Kenny
Dave Bemer
Mark Riley
Debbie Radley$24.45 (33%)$24.95 (33%)$24.45 (33%)

95 $18.34
95 $18.34
95 $18.34
95 $18.34
91
91
91
90
8278(25%)
(25%)
(25%)
(25%)

Figure 4 – Handicap Options Table

High Gun – 2 places per class – Split 60/40
Class B – 7 entries (@ $15 ea) = $105.00 ($35 per group of 50)

1st 50
Score

Allen John
96
Bechham, Jim
98
Carter, Beth99
Davidson, Marc 94
Ericson, Henry98
Foust, Jane90
Hines, Betty
94

4650
50
48
50
4145

2nd 50

payout%split$11.67$11.6733%
33%$11.6733%$35.00

3rd 50Score

payout%split

Score

payout%split

49
49
50
47
49
46
45

$4.67
$4.67
$21.00

13%
13%
60%

$21.0060%$14.00

40%

$4.67

13%

50
48
49
46
48
42
48

$35.00Note that entrants of this purse are not always listed by highst
Score. Entrants may do well in the 1 group of 50 targets, but
Not as well in the following groups of 50.

$35.00The following is an example of a Handicap Option
Table which might be used. These values, according
to your class, are added to your raw score. Themaximum score is 100 with all money returned tohigh score. Ties will usually divide with no shootoffs necessary.

ClassAAAAAABCDE

Skeet Calculations.410
28
20000422733
95411751396-120
123456

The Lewis Class Purse
The purse is very common, yet misunderstood by many. This purse does not use theNSSA or NSCA classification and has winners in multiple classes. Before the shoot begins, shootmanagement should determine how many classes there will be and how many places in eachclass. If this is too difficult to determine, an example program might read “there will be oneclass for every 10 entries”. When all shoting is complete, rank the scores in descending orderfrom highest to lowest. Then divide them into as many groups as there are classes.
For example, if there were 30 entries and 3 classes, there would be 10 scores in eachclass. Lines should now be drawn to show these classes. Because there will almost always be
odd numbers of entries and tied scores, the following rules have been established:
Rule 1 – When a short class is necessary because of an odd entry list, the short class shall headthe list. The figure 3 example shows that 22 entries and three classes create class 1 with sevenscores, class 2 with seven scores, and class 3 with eight scores.
Rule 2 – If the original class division line falls between a number of tied scores, the participants
are assigned to the class in which the majority of scores appear. Notice that in the example,
Beth Carter’s score of 98 moved her from the top of class 2 to the bottom of class 1 because
there were two 98s (Jim & Betty) on the other side of the original class line.
Rule 3 – If an equal number of tied scores appear on either side of the line, participants are
assigned to the top of the lower class. In the Figure 3 example notice that Judy and Dana’s 95
moved from the bottom of class 2 to the top of class 3 because of this rule.
Rule 4 – When the original lines have changed because of tied scores, the change shall apply
only to that class. The original lines will remain intact for all other classes unless they are
adjusted because of Rule 2 or Rule 3. After all rules have been applied, the places are awarded
according to the program and monies are distributed.
If you have any questions regarding any purses, or if you just want more information,please don’t hesitate to call us here at headquarters at 210-688-3371! We’ll do our best toanswer any questions you may have. Until then, keep your head down and your sights high!