Luck averages deal strength and starter-card luck. Deals are compared with 2,048 random five-card deals, using the best hand you could keep. Starter luck compares your actual hand with every starter you had not seen.

Skill averages three ratings: discard choices against the computer’s hand-and-crib estimate; pegging choices by points gained minus the expected immediate reply; and the proportion of available points you counted. Forced plays are excluded. Reaching 121 is never penalised for leaving extra points unclaimed.

These are separate ratings, not percentages of the win. They use your cards and public information, not the opponent’s hidden hand. They do not measure all strategy or luck in the crib. A dash means there was no evidence to rate.