In der training_result_converter.ini gibts folgende Einträge:

[CM_TRAINING_SIMULATION]
// Difficulty: 0 = Bronze, 1 = Silver, 2 = Gold, the sum of the values for a given difficulty must be 100
// Grade: 0 = A, 1 = B, 2 = C, 3 = D, 4 = F
DIFFICULTY_0_GRADE_0 = 20
DIFFICULTY_0_GRADE_1 = 25
DIFFICULTY_0_GRADE_2 = 25
DIFFICULTY_0_GRADE_3 = 25
DIFFICULTY_0_GRADE_4 = 5

DIFFICULTY_1_GRADE_0 = 15
DIFFICULTY_1_GRADE_1 = 30
DIFFICULTY_1_GRADE_2 = 30
DIFFICULTY_1_GRADE_3 = 20
DIFFICULTY_1_GRADE_4 = 5

DIFFICULTY_2_GRADE_0 = 10
DIFFICULTY_2_GRADE_1 = 20
DIFFICULTY_2_GRADE_2 = 35
DIFFICULTY_2_GRADE_3 = 30
DIFFICULTY_2_GRADE_4 = 5

Wenn du alle drei GRADE_0 Werte auf 100 und den Rest auf 0 setzt, müsste beim Simulieren immer A rauskommen, habs aber nicht getestet.