IN
Worth 2 points before any premium square, and the lowest-scoring of the 96 — tied with 35 others.
IN extends into 19 three-letter words, which is the 2nd most extendable of 96 — tied with 1 other. 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→AIN
- B→BIN
- D→DIN
- F→FIN
- G→GIN
- H→HIN
- J→JIN
- K→KIN
- L→LIN
- P→PIN
- R→RIN
- S→SIN
- T→TIN
- W→WIN
- Y→YIN
- Z→ZIN
- K→INK
- N→INN
- S→INS
Not all of them are equally reachable, which a bare count of 19 hides. IN hooks on 17 distinct letters, and the ones you are likeliest to be holding are A (49% of opening racks), R (36% of opening racks) and T (36% of opening racks). The rarest is Z, at 7%.
How often you can actually play it
Out of an opening rack, 16.33% of the time you hold the letters for IN outright, the 9th likeliest of 96 — tied with 7 others. Counting a blank as whichever letter is missing lifts that to 23.45%, 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.