MI
Worth 4 points before any premium square, and the 34th highest-scoring of 96 — tied with 18 others.
MI extends into 9 three-letter words, which is the 43rd least extendable of 96 — tied with 8 others. That is the number worth memorising: a two-letter word is a place to put tiles, but a well-hooked one is a place to put them where the board stays open.
Every hook
- A→AMI
- B→MIB
- D→MID
- G→MIG
- L→MIL
- M→MIM
- R→MIR
- S→MIS
- X→MIX
Not all of them are equally reachable, which a bare count of 9 hides. MI hooks on 9 distinct letters, and the ones you are likeliest to be holding are A (49% of opening racks), R (36% of opening racks) and D (26% of opening racks). The rarest is X, at 7%.
How often you can actually play it
Out of an opening rack, 6.06% of the time you hold the letters for MI outright, the 44th least likely of 96 — tied with 15 others. Counting a blank as whichever letter is missing lifts that to 12.69%, though spending one of the two blanks on a two-letter word is rarely the play. Exact hypergeometrics over the 100-tile bag, not a simulation.