After 1H > 1S

After a 1H > 1S, opener follows the following priority list in the next bid:

• Rebid 2S in case of 12-16 points with 4+ spades
• Rebid 3S in case of 17-21 points with 4+ spades (semi-GF, and GF if responder bids on)
• Rebid 1NT in case of a 5-3-3-2 hand with 12-14 points
• Rebid 2NT in case of a 5-3-3-2 hand with 18-19 points (semi-GF, and GF if responder bids on)
• In any other case, follow the bidding sequence after 1H > 1NT (continuations)*

* Note that because of the availability of the 1NT bid, 1H > 1S > 2C would show 4+ clubs (while 1H > 1NT > 2C only shows 2+ clubs).

In case opener rebids NT, responder may pass or continue as follows:

Response	After 1H > 1S > 1NT	After 1H > 1S > 2NT
2C/2D	4+ cards, exactly 4 spades, unbal.
2H	10-12, 3+ hearts
2S	6-10, 5+ spades
2NT	11-12, exactly 4 spades, INV to 3NT
3C/3D	11+, 4+ cards, exactly 4 spades, unbal.	4+ cards, exactly 4 spades, unbal.
3H	13+, 3+ hearts	10-12, 3+ hearts
3S	11+, 5+ spades	5+ spades
3NT	To play	To play
4H		13+, 3+ hearts

In case opener rebids spades, responder's new suit would be HSST.

In case opener rebids hearts, responder may continue as follows:

Response	After 1H > 1S > 2H	After 1H > 1S > 3H
2S	6-10, 1- heart, 5+ spades
2NT	6-10, exactly 1 heart, 4 spades
3C	9-12, exactly 0 heart, 4 spades
3D	10-12, 3+ hearts
3H	10-12, exactly 2 hearts
3S	11-12, 1- heart, 5+ spades	5+ spades
3NT	To play	To play
4C	HSST	Gerber
4D	HSST
4H	To play	To play