since 2♦ is a reverse IMO 3♦ would be the splinter and 4♦ would be exclusion Wouldn't 3♦ be a Jump Shift by opener, showing a 2 suited game forcing hand? Althought it seems wasteful to need a Reverse (2D) and a Jump Shift (3D), so maybe in this case 3D could have a meaning other than jump shift, showing strength. Splinters are fairly common, so I'm surprised more tables didn't see this bid. No, that is what 2♦ shows