Takeout doubles are useful when you have an opening hand but
Takeout doubles are used on bids by opponents of up to and including 2 spades.
Partner MUST bid best suit (major preferred).
Responder may pass if opposition intervene and responder has less than 6 points.
If responder to take out double has stoppers in the bid suit then bid NT.
Response to takeout double does not promise points.
If responder to takeout is strong then jump bid.
With five card major and opening hand, responder bids game.