A defense against the Unusual NT & Michaels

Where only 1 opponent suit is known

Bid Meaning
Cuebid the opponent’s known suit Limit raise or better in partner’s suit. Forcing.
Other bids Natural

Where 2 opponent suits are known

Bid Meaning
Cuebid the opponent’s lower known suit Limit raise or better in partner’s suit. Forcing.
Cuebid the opponent’s higher known suit Game-forcing with length in the unbid suit. Forcing.