In #1 as a passed hand there is no force unless you are playing 2c as drury.  So 2S would definitely be a reverse.  As an unpassed hand and playing 2/1, 2c would be gameforcing, so 2S would not be a reverse (as I play it).  Playing sayc, I think many play that 2S over a 2/1 response is also not a reverse.

 

In #2  I would play 2S as a reverse and if pard had the trap pass type of hand for the pass of 2D, he/she should definitely respond.

agree with rusty #1

agree with rusty #2

Just one thing to add to no 2..

 

# 1 - I agree with what has been said.  If north bids 2S over the 2 club replay, it is a reverse.  The reversing hand promises at least 1 more bid (other than pass or if partner doubles interference).

 

# 2 - This is not a reverse.  North is in passout seat and doesn't want to sell out for 2 diamonds.  It promises a distributional hand with cards in the black suits, no desire to defend 2 diamonds and not much in hearts.  A reopening double is preferable to bidding 2 spades when having a tolerance for the unbid suits or hoping that partner can pass the reopening double.  Reopen with a double when it's the right bid, don't let the opponents push you around and get away with bad bids.

#1 - SAYC, 2S would be reverse and since responder bid 2/1, also a GF. 2C is not forcing by a passed hand.

 

#2 - agree with bruce. agree with Irdoz's point about reverses not forcing if responder passes. Passing responder's only obligation is choosing between opener's two suits and can pass if likes 2nd better. But MUST return to 1st if likes it better. MAIN PURPOSE of having a partner is to help pick best trump suit. No excuses.

Definition of Reverse bid:

If you bid 2 suits, and in order to support your first bided suit your partner has to bid to the 3 level - then it's a reverse bid.

 

examples :

 

1CL - 1D

2H               partner has to bid 3 club if he wants to show a club support, than it's a reverse bid.

 

1CL - 1NT

2H              same thing, even though in a contrary to the 1st example you're "forced" to bid 2H.

I play 2 over 1 and still play the sequence of 1 H - 2 CL - 2 SP as a reverse, as 2H from the opener is a relay to show a minimum strength, not have to be with 6 Hearts.