# The CSV file format is as follows:
#   FIELD   MEANING
#   0   Round number
#   1   Timestamp, in the format YYYY-MM-DD HH:NN:SS
#   2   Round type: L, N or C
#   3   Letters selection, or numbers separated by spaces, or conundrum
#   4   Numbers target (blank if not a numbers round)
#   5   Player 1's offering (word for letters, declaration for numbers)
#   6   Player 1's method (numbers), buzz time (conundrum), else blank
#   7   Player 1's adjudication (0 valid, 1 invalid, 2 phantom, 3 not written down, -M misdeclared as M)
#   8   Player 1's score for this round
#   9   Player 1's cumulative score so far for the game
#   10  Player 2's offering
#   11  Player 2's method
#   12  Player 2's adjudication
#   13  Player 2's score for this round
#   14  Player 2's cumulative score so far this game
#   15  N: closest possible
#   16  L: best words, N: best numbers method, C: solution
#   17  Maximum score for this round (blank if unknown)
#   18  Cumulative maximum