Rockstar is a transfer based modern 2/1 bidding system.

Unique elements:

• Colorado 2♣, the 1 1/2 NT opener
• MH 2♦, the strong bid
• Transfers After 1♣ Opening
• The Macaw (unbalanced) 1♦ opening
• Non-forcing NT respondes to 1 of a major
• Extensile 2♣ response covers those cases previous using forcing 1NT
• Compressed Bergen Major suit Raises
• XYZ and Kokish Game Tries
• 4-way Transfers and mini-splinter after 1 NT opening
• TRaSH vs opponents NT and strong 1♣
• TRaP vs weak NT
• Rocksohl vs opponents interference of our NT
• Expert Gerber
• And so much more