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He protested that he had to use a TON of time to become --- > familiar enough to know when to use who. That struck me as pretty odd too.
I agree with you here, Diderot - that would be a definite plus on (say) Edgar's ledger, that he was so intimately familiar with each player's trends, good and bad habits, matchup 'tempations,' etc.
Just one plus, among many factors to consider, but a big factor.