Hi, I've started learning 2/1 Game Force system and have some simple questions about how does this system work. Let's consider following bidding: 1♣ - 1♦ ? What i should rebid with hand ♠KJxx ♥KQxx ♦AJ ♣KQx? - 1♥ - 2NT I suppose 2NT is correct answer, but what shapes are acceptable for 2NT rebid? What about 4-4-1-4 or 4-4-0-5? Is still 2NT correct or 1♥? My second problem is: 1♣ - 1♦ 1♥ - 1♠ I suppose 1♠ means fourth suit, but let's asume both bidders have four spades. How to agree spades after that beginning? Can you recommend me some books, where i can find those basics? I already have "Two over one Game Force" by Max Hardy and the same title by A. Grant, E. Rodwell. Thank you for help David