Rotative Sputnik

Rotative Sputnik.
This convention is used by a large number of players worldwide. It's a type of Texas bid by the Responder when the Opp has overcalled with 1♦ or 1♥. The aim is for the Overcaller to be on lead...
After an overcall, Responder can bid the following :

X always promises a minimum of 4 cards in the major immediately after the overcalled suit :
- On an 1♦ overcall X promises a minimum of 4♥ cards
- On a 1♥ overcall X promises a minimum of 4♠ cards
bidding 1♥ promises a minimum of 4 ♠ cards
bidding 1♠ denies 4 ♠ cards but gives the possibility of a 1NT bid

S	W	N	E

Problem E9655
The X from Responder promises at least 4 cards in the suit ranked one level higher than that of Overcaller's suit. In this instance it's COs.

S	W	N	E

Problem E9662
1♥ showing at least 4 ♠ cards, in this case it's 5 cards.

Rotative Sputnik ; Responder's bids

After an overcall of 1♦ , Responder promises :
- with X a minimum of 4 ♥ cards (suit that is ranked one level higher than♦)
- with the bid 1♥ a minimum of 4 ♠ cards
- with the bid of 1♠ neither 4 ♥ cards, nor 4 ♠ cards and no desire to bid 1NT!
After a 1♥ overcall, Responder promises :
- with X a minimum of 4 ♠ cards (suit that is ranked one level higher than ♥)
- with a bid of 1♠ denies 4 ♠ cards, no desire to bid 1NT and no changing suit to the other minor at the 2 level

S	W	N	E

Problem E9676
1♠ : denies 4 ♠ cards and no desire to bid 1NT

Rotative Sputnik : Opener's rebid
WIth a rebid, Opener describes his hand and a possible fit.

By bidding Responder's suit without a jump, Opener shows a 3 card fit, no stopper in Overcaller's suit (and possibly not 4 cards in the other major)
a non jump bid in Responder's suit promises a fit and a 1st zone opening
a double jump bid in Responder's suit promises a fit and a 2nd zone opening
1NT shows a regular hand and 1st zone opening with a stopper in Overcaller's suit
X from Opener shows 3 cards in Responder's suit and a "nice" opening