Editions I and II

I - Classic Edition - 5-card majors            II - Modern Edition - SAYC

Four bidding levels                                                    Five bidding levels

1 notrump: 16-18 HCP                                             1 notrump: 15-17 HCP

Strong 2-bid, levels 1-3                                             No

Weak 2-bid, level 4                                                   Yes

Strong 2-clubs, level 4                                               Yes, all levels

Blackwood and Gerber conventions                           Yes

Stayman convention                                                   Yes

Takeout double                                                          Yes

No                                                                             Limit raise

No                                                                            Jacoby transfer to a major

No                                                                            Jacoby 2 notrump response to a major

No                                                                            Negative double

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