Term
Effective pip count
 Useful in endgame races
 to use the cube efficiently
 there are some basics rules : 

Definition
RULES

N roll position : 7n+1, each roll that not save a roll cost 0.2 effective pip, adjustement may be necessary

"nice"position waste 7 pips, 6,5 pips if half of the checkers are out and 6 pips when there's just 5 or 6 checkers left

"flat"position waste 10 pips

Know the stack and stragglers formula : 3.5n+p

Know the multiple stack and stragglers formula 3.5n+p1+P2...4



Term

Definition
N roll position have an EPC of 7n+1
Blue needs 5 rolls to bear off : 7x5+1 = 36
White needs 4 rolls to bear off : 7x4+1= 29 


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Definition
This is not a N roll position but it's close: we adjust by calculating the number of pips per checker:
 for blue pip count at 20 and 10 checkers: mean 2
 for white pip count at 20 and 10 checkers: mean 2
then we adjust with that table :
even number of checker odd number of checker
1 2 2,6
2 2,3 2,9
3 2,6 3,2
4 2,8 3,4
5 3 3,6
here add 1 epc to the count of the 2 players because mean at 2 and number of checkers even, so 5 roll position : 7x5+1=36 plus adjustment +1 = 37 


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Definition
each roll that doesn't save a roll cost 0,2 effective pip. here white and blue miss on 11 so their effecive pip count is:
2 roll position
7x2+1+0,2=15,2 


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Definition
Nice position
waste 7 pips :
 blue: pip count à 75 + 7 = 82 EPC
 white: pip count à 77 + 7 = 84 EPC 


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Definition
With half of the checkers off and still a nice position, add 6,5 


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Definition
With only 5 ou 6 checkers and still a nice position, add 6 


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Definition
FLAT position
waste 10 pips:
 blue pip count 42 = EPC of 52
 white as a usefull reference position to know : this one waste exactly ten pips. move one of the spare higher and it's between a nice and a flat position, move lower and the wastage is higher 


Term

Definition
Stack and straggler formula
Blue count is:
3,5xn+p
n is the number of checkers on the board
p is the pip of the straggler
here 3,5x12+16=58
White as a nice position with adjustment odd number of checkers, mean at 26/13 = 2 adjustment less than 1.
7 roll position so 7x7+1 = 50 and just a little more with the adjustment. 


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Definition
Multiple stack and straggler formula
The same except that you add each pip of straggler and you add minus 4 at the end :
3,5x9+20+174=64,5 


Term
Application
how to use the cube with EPC ? 

Definition
To use the cube :
 divide the epc of the doubler by 7 (round down)
 that number3
 add the result to the EPC of the doubler: you have the point of last take
 if your opponent is within 2 points of the last take, you have a double
 if your opponent is within 1 point of the last take, you should redouble
 if your opponent is over the point of last take, he should drop
 beware of the number of roll, if there is few rolls left, there's no recube vig and everyone knows that a pure 3 roll position is a drop 


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