Here are four fomulas, based on the ladies LP at 2007 Worlds. (The r vales range from .76 to .79.)

1. Total PCS = .75 x (Total TES) + 13.

2. Total PCS = 39 x Ln(Total TES) - 102. (Ln is the natural logarithm.)

3. Total PCS = 23 x 1.0153^(Total TES). ( "^" means, "raise to the power".)

4. Total PCS = 2.2 x (Total TES)^.8.

Let's try Elene Gedevanishvili. Her total tech score was 44.62. The predicted values of her PSCs are

1. PCS = .75 x 44.62 + 13 =46.47

2. PCS = 39 x Ln(44.62) - 102 =46.13

3. PCS = 23 x 1.0153^44.62 =45.27

4. PCS = 2.2 x 44.62^.8 =45.92

Actual PCS:46.81

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