for example,
1♦-1♥
2♣-2♠(normal treatment of 4th suit FG)
1♦-1♠
2♣-2♥(normal treatment of 4th suit FG)
1♦-2♣(normal treatment of 2/1 suit, FG)
(or better don't play a Natural respond of this 2♣?)
or
(Assume with partner's suit short, may be 1NT if suitable)
say
x
AT9
KJxx(x)
AQxx(x)
1♦-1♠/♥
1N-2♣(normal treatment of new minor forcing)
1♣-1♥/♠
1N-2♦(normal treatment of new minor forcing)
how to distinguish from xx45/xx54/xx55/2245/2254 ?
Besides, I do not like very complicated method

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