Responses to 1 of a major
    In an uncontested auction any new suit bid (where it is not preemptive) at the 3 level is 100% forcing.This applies to both opener’s and responder’s calls.
    SAYC, in common with all versions of Standard American, adheres to the new-suit forcing principle, ie., a new suit by responder is forcing for 1 round, unless reponder has previously passed or either player has bid notrump.
    Having said this, very few 1st/2nd round bids in uncontested auctions are 100% forcing in SAYC – J2N, a jump shift, and a new suit bid at the 3 level are forcing. If responder makes a 2 level first round bid then he usually promises a rebid. See also
Splinters in Part 2.

[1H 5card+;12HCPs+;
(-)/? 1S:min 6 Points, at least 4card S. unlimited bid does not necessarily deny 3card H;
 1NT:6-10HCP balanced hand. denies 4card S and (usually) 3card H (NF);
 2H: (a) 6-10 Points,& at least 3H limit bid, can be passed;
        (b) Over opener's 1S would show 5card H, 11+Points. unlimited bid;
 2m:11+Points and 4+card minor suit;
 2NT!:13+points, asks partner to show short suit while agreeing trump fit(GF+);Note:
 If not playing J2N, responses of 2NT and 3NT are defined in SAYC as standard, 13-15 and 16-17; however,
 many OKb players prefer 2NT=11-12 and 3NT=13+, so
 you should agree 'forcing' or 'limit' 2NT response; or else
 you'll have to guess. If in doubt try to find a new suit bid and then bid 2N/3N;
 2S/3m:(Jump Shift) 17+Points (forcing+);
 3H:10-12 Points + 3+ trumps. limit raise (invitational but non-forcing);similar to 3S over 1S;
 3NT:15-17HCP, balanced hand, at least 2card  hearts (NF);
 4H:usually 5+ hearts, a singleton or void, and fewer than 10 HCP (NF);similar to 4S over 1S;

Responses to 1 of a Minor Opener
    A 1D  opener suggests at least a 4-card diamond suit, since 1C is preferred on hands where a 3-card minor suit must be opened.
    The exception is a hand with 4-4-3-2 shape, which should be opened 1D . Responses and later bidding generally follow the same principles as "Responses to 1 of a Major". Bidding at the one level is "up-the-line" in principle ie., bid next-ranking 4-card suit if no 5+-card suit to bid. Bidding "up-the-line" does not
constitute a "reverse bid".

    Note 1: Over a 1C/1D  opener, without a higher-ranking 4-card suit to show, responder needs 5 trumps to raise 1C, or 4 trumps to raise 1D , (one less trump will do in a competitive sequence);
    Note 2: Responses of 2NT/3NT are standard: (ie., responses of 2NT and 3NT are defined in SAYC as standard, 13-15 and 16-17; however, many OKb players prefer 2NT=11-12 and 3NT=13+, so you should agree 'forcing' or 'limit' 2NT response or else you'll have to guess. If in doubt try to find a new suit bid and then bid
2N/3N);
    Note 3:There is no forcing minor-suit raise. {See also Part 2 Splinters, Inverted Minors and Bergen Raises}


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