The eight triple-word-score squares sit at the corners and edges of the board. Reaching one with a high-value tile can swing a game by 30 to 80 points in a single move. Understanding when to open them and when to block them is one of the most nuanced skills in the game.
Opening vs. blocking
Playing toward a triple-word square opens a lane your opponent can exploit. The right question isn't "can I reach it?" but "what can my opponent do from there?" If they can respond with a high-value tile on the same square, it may be better to leave the lane closed and score elsewhere.
Double-triple lines
The highest-value plays in Scrabble occur when a word spans two triple-word squares, multiplying its base value by 9×. These plays are rare but game-defining — most commonly along the top or left edges of the board.
Board control tip: Count tiles already played along triple-word lanes. If the lane is 6 tiles from a corner triple and your opponent holds short words, block it proactively even if you score less on that turn.
Using extensions to hit premium squares
Sometimes the best way to reach a triple is extending an existing word. Adding -ED, -S, -ER, or -ING to a word already adjacent to a triple can land your high-value tile exactly on the premium square for maximum effect.