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The only difference between Standard American and 2/1 game forcing is the major suit auction

Responses to a major suit opening Edit

Responses to a major suit opening
points 0-5 6-10 11-12 13+
10-card fit Game (preemptive) Limit raise Jacoby 2NT
9-card fit Single raise
8-card fit 2/1 game forcing
4-card suit Forcing 1NT
1

Responses to a minor suit opening Edit

Same as Standard American/suit auction#Responses to a minor suit opening