2 over 1 or Standard American bidding systems.
Four play options:
(1) Rubber bridge scoring.
(2) Swiss Team 7 hand format.
(3) Practice mode.
(4) Chicago scoring with 4 hand rounds.
Bidding conventions: Stayman, Puppet Stayman, Transfers, Michaels, Unusual NT, Sandwich NT, Jacoby 2 NT, Texas Transfers, Blackwood, Modified Hamilton, DocFox, Drury, Response Doubles, New Minor Forcing, OGUST, Gambling 3 NT, 4th Suit Forcing, Inverted Minor, Flip-Flop