Backgammon Snowie

Snowie

Terminology

From:   Alexander Nitschke
Address:   nits1431@mailszrz.zrz.tu-berlin.de
Date:   21 September 1998
Subject:   Re: Snowie terminology
Forum:   rec.games.backgammon
Google:   3606A517.B5D20727@mailszrz.zrz.tu-berlin.de

bsheppard@hasbro.com wrote: > The following are the first few lines of a typical Snowie game summary: > > Castro Salo > Error rate 1.282 0.695 > Nb errors (Nb blunders) 2 (2) 1 (1) > Luck rate (Nb joker) 3.752 (5) -3.752 (2) > Nb wrong double 1 (DP 12.25 TG 0.00) 0 (DP 0.00 TG 0.00) > > The term "Error rate" implies a formula of the form "Error-Measure > divided by Some-Type-Of-Unit." Can anyone tell me the actual formula? The error rate measures only checker play errors and is calculated as follows: A checker play error occurs when a move is played which has lower equity ("match score adjusted equity", see another post) than the best move. The difference is the value of the error. The sum of all checker play errors (in a game or the whole match) id then divided through the number of unforced moves (all rolls with at least two legal moves). > What does the abbreviation "Nb" stand for? Number. The number of blunders is always smaller or the same as the number of errors, since they are included. > Luck rate: what does this mean? (And why should I care?) Each roll is good for one player or the other. How good is measured in equity units deviation from the average roll. These equity deviation are summed up from the viewpoint of one player and then divided through the total number of rolls in the game or match. You shouldn't care much about this, the error rates are much more important :-) > What do "DP" and "TG" and stand for? DP: Wrong double around doubling point. TG: Wrong double around too good point. > Thanks in advance, > Brian Sheppard Nice to help you out. Best greetings, Alexander Nitschke

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