Translating Testing to Results
Success or failure in a Magic tournament is not decided over 1,000 games played in your living room before the tournament. Success or failure will depend on a very small number of games, and on one or two incidents during those games – choosing whether or not to mulligan, choosing which cards to sideboard in or out, deciding which creatures to attack with or which spell to cast on your fourth turn, little things like that. Your testing, therefore, needs to focus on preparing you to make those decisions.