Leaping Non‐Leaping Michaels - folksbridge21/system2 GitHub Wiki

Leaping Michaels is a conventional 4C or 4D jump overcall of a weak 2H or 2S. It promises a good two-suited hand with at least 5-5 shape. As an extension of the Michaels cuebid, it's named for the "leaping" or "jumping" aspect of the overcall.

A 4C jump overcall shows clubs and the unbid major.
A 4D jump overcall shows diamonds and the unbid major.

Additionally, Leaping Michaels can be used over minor-suit preempts:

After an enemy 2D, a 4C jump overcall shows clubs and an unspecified major.
After an enemy 3C, a 4D jump overcall shows diamonds and an unspecified major.

2H/2S-4C: C + the other major
2H/2S-4D: D + the other major
2D-4C: C + one major
3C-4D: D + one major

Non-Leaping Michaels

3D-4C: C + one major 3M-4m: m + the other major