Bridge Further Considerations Using Negative Doubles

This video provides information about the 5 different negative doubles, their use and benefits. Many hands are used to illustrate when to use negative doubles and when not to use them.
Susan Williamson, Life Master, Accredited American Contract Bridge League Teacher was the founder of the nonprofit Fun and Games Duplicate Bridge Club in Oklahoma City. Susan passed away January 31, 2025.

[@johnworf]

1:07:24 - you wouldn't bid 2S here because after doubling that would show a weak hand with about 6 spades - the bidding could go 3C - 3S - then a special bid of 5S would indicate we probably have everything but we have 2 losers in diamonds - east if they are brave can then bid 7S with a void in diamonds.

[@eagelwizard290]

Regarding the deal at the end:
Why is 3C forcing?
1C - 2D - X - P -
2H - P - 3C(?)
How would you bid a hand with 10-11 points and the same shape differently so you don't get too high? (and assume east might not have 4 Spades)
And if 3C is not forcing that kind of bidding looks like it has a similar flaw to the one criticized. You might not reach the game with 29 combined HCP.

[@RedDirtBridge]

The first reason that 3 clubs is forcing is that Responder needs at least ten HCP to use a Negative double in this auction. He promises only ONE four-card major, so he needs to be able to bid 2NT or 3 of Partner’s minor. Either response means he needs enough to have a combined 23 HCP between the two hands.
Now, West may have four cards in each major; since West now knows that Partner MUST have four spades, he should show the spade suit. When West bids 3 spades, Responder can pass if he lacks extras. On this particular hand, West must either make a forcing bid or jump directly to 4 spades. (If West lacks both a four card spade suit and a diamond stopper, he bids 5 clubs. As I said on the video, finding six or seven spades requires considerable bidding skill).
Susan