[manudude03]

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If a strong jump shift followed by showing support guarantees 4 card support, then can it be set up that a strong jump shift can't be done with 3 card support?

[iandayre]

Best solution IMO would be eliminate SJS to the 3 level. Not enough room to make them very useful. A good and uncomplicated substitute playing 2/1 would be 6 card suit, game invitational.

[jdonn]

He shouldn't SJS with 3 card support for opener's major to begin with. That is the problem.

[lycier]

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I strongly suggest Sloway Jump Shift should be eliminated at once, it never be a good bidding style for Gib 2/1 system.

[iandayre]

lycier, on 2017-January-08, 20:21, said:

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I strongly suggest Sloway Jump Shift should be eliminated at once, it never be a good bidding style for Gib 2/1 system.

I agree at the 3 level. At the two level, they are an excellent tool and should be retained. GIB actually handles them fairly well, given its inability to evaluate properly opposite a splinter. If you bid 2S over 1D with AQJTx, KJx, AQxx, x, then follow with 3(or 4 if necessary) Clubs, GIB won't promote 3 small nor de-evaluate KJx in that suit.