Every square on a chess board has a name made of a letter and a number, such as e4 or g7. The letters a to h name the columns, called files, and the numbers 1 to 8 name the rows, called ranks. Once you know this grid, you can read and record any move. This guide covers the grid itself, shortcuts for colors and diagonals, a worked example of writing down a game, and drills to make the names automatic.
Files and Ranks
- Files run up and down the board and are labelled a through h, from White’s left to White’s right.
- Ranks run side to side and are numbered 1 through 8, with White’s pieces at the bottom on ranks 1 and 2.
- A square is named file first, then rank. The square where the file e meets rank 4 is e4.
From Black’s side the labels do not change. The a1 square is always a dark square at White’s lower left.
Black’s pieces begin on ranks 7 and 8, so Black’s pawns sit on rank 7 and the Black king sits on e8 at the outset. Because the names are fixed to the board and not to the player, a diagram and a move list always agree, no matter who is sitting where.
Handy Anchors
Learning a few reference squares lets you locate any other quickly.
| Square | Colour | Why remember it |
|---|---|---|
| a1 | Dark | White’s queenside rook corner |
| h1 | Light | White’s kingside rook corner |
| e1 | Dark | White king’s home square |
| e4, d4, e5, d5 | Mixed | The four central squares |
A useful test: if the letter’s position in the alphabet and the number are both odd or both even, the square is dark. Otherwise it is light. For example, a1 (1 and 1) is dark and h1 (8 and 1) is light. Try e4: e is the fifth letter, 5 and 4 differ, so e4 is light. And d4: d is the fourth letter, 4 and 4 match, so d4 is dark.
Ways to Practise
- Name a square aloud, such as f6, then point to it on a real board.
- Point to a random square and say its name.
- Name two squares and say whether they have the same colour.
- Trace a knight route from b1 to f3 using named squares.
- Play a few moves with your eyes shut and call the squares to a friend.
Short daily drills work better than a single long session. Five minutes of naming squares builds the habit faster, and mixing in the color test keeps the drill from becoming dull.
Coordinates in Move Names
A move is written as the piece letter plus the destination square. Nf3 means a knight goes to f3. A pawn move needs only the square, as in e4. Captures add an x, so Bxc6 means a bishop captures on c6. Understanding the grid is what makes reading these simple.
Diagonals are easy to follow with coordinates too. The long diagonal from a1 to h8 passes through b2, c3, d4, e5, f6 and g7, with both the letter and number rising by one each step.
The piece letters are K for king, Q for queen, R for rook, B for bishop and N for knight, since K is already taken. Castling is written O-O on the kingside and O-O-O on the queenside. A plus sign after a move means check, and a hash sign means checkmate.
Worked Example: Writing Down the First Moves
- White moves the pawn in front of the king two squares: 1.e4. The pawn travels from e2 to e4 along the e file.
- Black answers with the pawn in front of its king: 1…e5. It goes from e7 to e5.
- White develops the knight from g1 to f3: 2.Nf3. This attacks the pawn on e5.
- Black develops the knight from b8 to c6: 2…Nc6, defending that pawn.
- White brings out the bishop from f1 to b5: 3.Bb5. It travels along the diagonal f1, e2, d3, c4, b5.
- Written together, the opening reads 1.e4 e5 2.Nf3 Nc6 3.Bb5, and anyone who knows the grid can set it up from the page.
Note that the number counts the pair of moves, with White’s move first and Black’s second. A three dot mark, as in 1…e5, shows a Black move when White’s move is not written before it.
Common Scenarios
Reading a diagram from a book
Look at the printed letters along the bottom and numbers along the side. Usually White is at the bottom, so a1 is at the lower left. If the diagram is turned, the letters and numbers are reversed, so rely on the labels.
Following a friend’s spoken moves
Listen for the piece and square, such as “knight to f3”. Find the file first, then count the rank from your own side or from White’s side.
Keeping score of a game
Write each move in order on a sheet with columns for White and Black. When two similar pieces can reach the same square, add the file or rank of the one you moved, as in Nbd2 when both knights could go to d2.
Teaching a child the board
Use the letters as a treasure map. Ask them to place a pawn on d4 or find the square where two named lines cross, so the grid becomes a game itself.
Mistakes to Avoid
- Writing the number first. The letter always comes first, so 4e is wrong and e4 is right.
- Counting ranks from your own side when playing Black. The numbers belong to the board, so rank 1 is always White’s back row.
- Confusing b and d when speaking. Say “bee” and “dee” clearly, or use a word that makes the letter distinct, such as “bravo” for b, if you share a noisy room.
- Mixing the file and rank names. Remember that files are the vertical lines and ranks run across, like the ranks of an army in a row.
- Forgetting the capture sign. Without the x, a move such as Bc6 and Bxc6 look similar, so add it for clarity.
Glossary
- File. A vertical column of eight squares, named a to h.
- Rank. A horizontal row of eight squares, numbered 1 to 8.
- Diagonal. A line of same-colored squares running corner to corner.
- Algebraic notation. The standard way of writing moves using piece letters and square names.
- Capture. Taking an enemy piece, shown with an x.
- Castling. A king and rook move, written O-O or O-O-O.
- Check. A direct attack on the king, shown with a plus sign.
FAQ
Do all boards have coordinates printed?
Not all. Many boards have none, so learning the layout in your head is helpful. Diagrams in books and websites usually print them around the edges.
Why is a1 dark?
It is a standard of the game: the board is set so each player has a light square at their right hand corner, which makes a1 dark.
How do I tell which knight moved if both can reach a square?
Add the file letter of the knight that moved after the piece letter, as in Nbd2. If both knights are on the same file, use the rank number instead, as in N1f3.
What do the letters on the sides of a diagram mean?
They name the files and ranks so you can find squares at a glance. The letters run along the bottom edge and the numbers along the side, in the order shown.
How long does it take to learn the board?
Most people feel at ease after a few short practice sessions. Reading a game aloud while moving the pieces is one of the fastest ways to make the names stick.
The Short Version
Letters name files, numbers name ranks, and each square is written file first. Learn the corner colours and the central four squares, and practise naming squares until it feels automatic. Then writing and reading moves becomes straightforward.