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Stayman convention
/stˈeɪmən kənvˈɛnʃən/
/stˈeɪmən kənvˈɛnʃən/Stayman convention
01
hệ thống Stayman
a bidding system used by the responder to ask the opener if they have a four-card major suit, typically either hearts or spades, after an opening bid of 1NT
