Scrabble Rules — Complete Guide to Playing Scrabble

Board Setup and Equipment

A standard Scrabble set includes: a 15×15 game board, 100 letter tiles, a tile bag, and four tile racks. The board features premium squares that multiply letter or word scores — these are discussed in detail below. Before the game begins, each player draws one tile to determine who goes first; the player with the letter closest to 'A' (blank tiles beat all letters) starts.

The 100 Tile Distribution

Knowing the tile distribution is critical for strategic play. Here is the exact makeup of the 100-tile set:

• Blank tiles (2): Score 0 points each. Can represent any letter. Once placed, the chosen letter is fixed for the rest of the game.
• 1-point tiles (68): A×9, E×12, I×9, O×8, R×6, N×6, S×4, T×6 — the workhorses of the game.
• 2-point tiles (7): D×4, L×4, U×4 (12 total — includes some 1-point counts above, recheck: D=4, L=4, U=4 = 12 tiles at 2 points each).
• 3-point tiles (8): G×3, H×2, P×2, M×2, B×2, C×2, W×2, Y×2, F×2 — note actual distribution: G=3, H=2, P=2, M=2, B=2, C=2, W=2, Y=2, F=2 = 19 tiles, some at different points. Let's be precise.

The complete official distribution is: A-9 (1pt), B-2 (3pt), C-2 (3pt), D-4 (2pt), E-12 (1pt), F-2 (4pt), G-3 (2pt), H-2 (4pt), I-9 (1pt), J-1 (8pt), K-1 (5pt), L-4 (1pt), M-2 (3pt), N-6 (1pt), O-8 (1pt), P-2 (3pt), Q-1 (10pt), R-6 (1pt), S-4 (1pt), T-6 (1pt), U-4 (1pt), V-2 (4pt), W-2 (4pt), X-1 (8pt), Y-2 (4pt), Z-1 (10pt), Blank-2 (0pt). Total: 100 tiles. Total points (ignoring blanks): 187.

Turn Structure

Each turn follows the same basic structure:

1. Draw tiles: If your rack has fewer than 7 tiles, draw enough from the bag to bring your rack back to 7. At the start of the game, each player draws 7 tiles.
2. Play, exchange, or pass: You have three options on your turn — place a word on the board, exchange any number of tiles (forgoing your play that turn), or pass (doing nothing).
3. Score your play: Calculate the score for your newly placed tiles, including any premium square bonuses. Add this to your cumulative total.
4. Draw replacement tiles: After placing tiles, draw enough from the bag to return your rack to 7. You do NOT draw if you exchanged or passed.

How to Place Words on the Board

The first word of the game must cover the centre square (H8, marked with a star or +). This square acts as a Double Word Score. Every subsequent word must connect to an existing word on the board — either by adding letters to an existing word, placing a word parallel to an existing word, or extending an existing word by adding letters at the beginning or end.

Tiles can only be placed in a single row (left-to-right) or a single column (top-to-bottom) per turn. All tiles placed in a single turn must form a continuous line. Diagonal placement is not allowed. Every letter you place that touches an existing letter must form a valid word in both directions (across and down).

You may place fewer than 7 tiles in a turn — you are not required to play all your tiles at once. However, playing all 7 tiles in a single turn awards a 50-point bonus called a bingo.

Scoring System

Each letter tile has a point value printed on it. Blank tiles score 0 points. The score for a play is calculated as follows:

1. Add up the point values of all newly placed tiles.
2. Apply premium square bonuses on the tiles you placed this turn. Double Letter (DL) doubles the value of a single tile. Triple Letter (TL) triples it. Double Word (DW) doubles the entire word's value. Triple Word (TW) triples it.
3. If you used all 7 tiles, add the 50-point bingo bonus.
4. Premium squares only count when a tile is placed on them during that turn. Previously placed tiles do not score premium square bonuses again.

When a blank tile is placed on a premium square, the premium still applies to the word score — but since the blank is worth 0 points, Double Letter on a blank still gives 0. However, if placed on a Double Word or Triple Word square, the word multiplier still applies.

Premium Square Layout

The standard 15×15 board has the following premium squares: 8 Double Word (DW) squares, 17 Double Letter (DL) squares, 12 Triple Letter (TL) squares, and 4 Triple Word (TW) squares — plus the centre start square which counts as a Double Word. The TW squares are located at (1,1), (1,8), (8,1), (8,15), (15,1), (15,8), (1,15), (8,8) — note the standard layout: TW at (1,1), (1,8), (8,1), (8,15), (15,1), (15,8), (1,15), (8,8) — actually the four TW squares are at (1,1), (1,8), (8,1), (8,15), (15,1), (15,8), (1,15), (8,8) — that's 8. Let's be precise: The standard board has 8 Triple Word squares (the four corners and the four midpoints of each edge), 17 Double Letter squares, 12 Triple Letter squares, and 8 Double Word squares including centre.

Valid Words and Challenges

Not every word is valid in Scrabble. Only words found in the designated dictionary — either the Collins Scrabble Words (CSW) list or the NASPA Word List (TWL) — are acceptable. Proper nouns, prefixes, suffixes, abbreviations, and hyphenated words are generally not allowed unless specifically listed.

The Challenge Rule

If a player believes an opponent's word is invalid, they may challenge it. The challenge is resolved by checking the official dictionary:

• If the word is valid: The challenger loses their turn (in tournament play) or faces a penalty (in some house rules).
• If the word is invalid: The challenged tiles are removed from the board, the player who played them takes them back, and they lose their turn.
• Blank tile challenges: Once a blank is placed and its letter is declared, the declaration is final. You cannot later change what letter the blank represents.

In casual games, many players use a "free challenge" rule where no penalty applies to the challenger. Tournament play typically follows the "double challenge" rule: the challenger loses their turn if the word is valid.

Passing and Exchanging Tiles

If you cannot or choose not to make a play, you have two alternatives:

• Pass: You may pass your turn entirely. You score nothing and do not exchange any tiles. If every player passes twice in a row (four consecutive passes total, or six in some rule variants), the game ends.
• Exchange: You may exchange any number of tiles from your rack for an equal number from the bag. To do this, put the tiles you want to exchange face-down, draw replacements, then return the exchanged tiles to the bag. You forfeit the ability to play a word that turn. Exchanging is not possible if fewer than 7 tiles remain in the bag (since you cannot draw replacements).

Game End Conditions

The game ends when one of the following conditions is met:

1. No tiles remain in the bag and one player uses their last tile, OR
2. All players pass twice consecutively (four total passes in a row), OR
3. Six consecutive passes in some tournament rule variants.

When the game ends, the player who played all their tiles (if applicable) scores double the combined point value of all tiles remaining on all opponents' racks. If no one used their last tile (the game ended by consecutive passes), each player subtracts the point value of tiles remaining on their own rack from their total score. The player with the highest total wins.

CSW21 vs TWL — Which Rules Apply?

The word list you use determines which words are valid. Scrabble Solva uses CSW21 (Collins Scrabble Words 2021), the international standard with over 279,000 valid words. North American tournaments typically use TWL (NASPA Word List), which is smaller and excludes many words found in CSW21.

Key differences include words like DA, GI, OK, TE, and ZA which are valid in CSW21 but may not appear in all TWL versions. Scrabble Solva's Safe Mode shows only words common to both lists — the safest choice for casual and cross-dictionary play. See our CSW21 vs TWL comparison for the full breakdown.

Official Rules vs House Rules

While official Scrabble rules are standardised for tournament play, many casual players use house rules. Common house rule variations include:

• Free challenge: No penalty for an incorrect challenge.
• Proper nouns allowed: Some players allow names of people, places, or brands.
• No bingo bonus: The 50-point bonus for using all 7 tiles is sometimes omitted in casual play.
• Different board sizes: Super Scrabble uses a 21×21 board with 200 tiles — Scrabble Solva supports 15×15, 21×21, and 29×29 boards.
• Variant dictionaries: Some groups use the Official Scrabble Players Dictionary (OSPD) instead of CSW21 or TWL.

Whatever rules you choose, consistency is key — agree on the rules before the game starts, and stick to them.