EX
Worth 9 points before any premium square, and the highest-scoring of the 96 — tied with 5 others.
EX extends into 7 three-letter words, which is the 26th least extendable of 96 — tied with 7 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
- D→DEX
- H→HEX
- K→KEX
- L→LEX
- R→REX
- S→SEX
- V→VEX
No letter after EX makes a word.
Not all of them are equally reachable, which a bare count of 7 hides. EX hooks on 7 distinct letters, and the ones you are likeliest to be holding are R (36% of opening racks), D (26% of opening racks) and L (26% of opening racks). The rarest is K, at 7%.
How often you can actually play it
Out of an opening rack, 3.85% of the time you hold the letters for EX outright, the 16th least likely of 96. Counting a blank as whichever letter is missing lifts that to 11.55%, 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.