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Bridge base basic, also known as BBO basic, is a bidding system for the game of bridge based on Standard American Yellow Card. It is simplified, suitable for beginners, and widely used in internet bridge particularly on Bridge Base Online.〔(Bridge Base Online )〕 It is taught in Fred Gitelman's educational software called Learn to Play Bridge that is available as a free download from the American Contract Bridge League's website.〔("Learn to Play Bridge" Software from the ACBL )〕 ==Key points of BBO Basic Bidding== Like SAYC, BBO basic depends upon hand evaluation using the high card point method. Hand shape adjustments are made for long suits (1 point additional for every card longer than 4 in a suit) when bidding a new suit, and for short suits when showing support for partners bid (5 for a void, 3 for a singleton, and 1 for a doubleton).〔 Other similarities to SAYC include: *Five-card majors: opening a major suit promises at least five cards in that suit. *Weak two bids: Two diamond, heart or spade openers are made with a six-card suit and 6 to 10 high card points. Two of the top three honors are promised in that suit. *Strong two clubs: An artificial 2 call promising 22 points or more. *Pre-emptive openers: including weak-three bids (all denominations except notrump) and weak-four bids (minor suits only) similar to the weak-two bids but showing additional length. *Notrump openers show a balanced hand (no void, no singleton, at most one doubleton, and may include a five-card major) with the following point ranges: * *1 NT = 15 to 17 points * *2 NT = 20 to 21 points * *3 NT = 25 to 27 points *Stayman and Jacoby transfers conventions for notrump openers *Blackwood or Gerber for slam bidding. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bridge Base Basic」の詳細全文を読む スポンサード リンク
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