AA
Worth 2 points before any premium square, and the lowest-scoring of the 96 — tied with 35 others.
AA extends into 4 three-letter words, which is the 11th least extendable of 96 — tied with 2 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
- B→BAA
- H→AAH
- L→AAL
- S→AAS
Not all of them are equally reachable, which a bare count of 4 hides. AA hooks on 4 distinct letters, and the ones you are likeliest to be holding are L (26% of opening racks), S (26% of opening racks) and B (14% of opening racks). The rarest is H, at 14%.
How often you can actually play it
Out of an opening rack, 11.96% of the time you hold the letters for AA outright, the 25th likeliest of 96. Counting a blank as whichever letter is missing lifts that to 17.02%, 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.