?

- 4m               : 11-14 HCP and singleton in the bid minor, (5-4-3-1)
- 4©                : 12-14 HCP with (5-4-2-2)
- 3NT              : 15-17 HCP with four card support with unspecified singleton
- 3©                : four card support and very good hand, with 18+ HCP may have singleton or not.

1ª   -             2©

3NT  -             4§                  asks singleton

?

- 4¨               : lower singleton (Romex Responses)

- 4©                : higher singleton
                        

1ª   -             2©
3©   -             3ª                  asks singleton

?

- 3 NT             : no singleton                       

1ª   -             2©
2NT -             3NT

?

- 4©                : shows balanced hand, 15-17 HCP with three card support

- 4m               : shows balanced hand, 18-19 HCP with three card support

1ª   -             2©
2ª   -             2NT

?

- 3©                : shows minimum hand with three card support

- 4m               : shows singleton in the bid minor with (6-3-3-1) distribution

1ª   -             2©
2ª   -             2NT

3©   -             3ª                  asks singleton

?

- 4m               : shows singleton

- 3NT              : no singleton, Hxx heart

- 4©                : no singleton, xxx or 10xx heart

1ª   -             2©
3m   -             3NT

?

- 4©                                     : shows three card support in hearts and singleton in the unbid minor with 15-16 HCP

- 4(other) minor                      : shows singleton in the bid minor, three card support  in hearts and 17+ HCP