Chess Notation Explained: How to Read and Write Algebraic Chess Moves

Algebraic notation is the standard way chess moves are written down — it's what you see in books, on broadcasts, and in every game's move history here. Once you know the pattern, reading it takes about ten minutes to learn and a few games to feel natural.

The coordinate system

Every square on the board has a unique address, built from two things:

• Files — the eight columns, labeled a through h, left to right from White's side of the board.
• Ranks — the eight rows, numbered 1 through 8, starting from White's side.

Combine them and every square gets one unique label: e4, a1, h8, and so on. White's king starts on e1; Black's king starts on e8. That's the entire coordinate system — the rest of notation is just describing which piece moved to which square.

Piece letters

Each piece (except pawns) gets a single capital letter when it moves:

• K — King
• Q — Queen
• R — Rook
• B — Bishop
• N — Knight (not "K" — that's reserved for King)

Pawns get no letter at all. A move like e4 on its own means "a pawn moved to e4" — if it were the knight, it would be written Ne4.

Captures, check, and checkmate

A few symbols added after the piece and square carry extra meaning:

• x — a capture happened. Nxe4 means "knight captures on e4."
• + — the move puts the opposing king in check. Qh5+ means "queen moves to h5, giving check."
• # — the move is checkmate. Qh7# means "queen moves to h7, checkmate."
• = — pawn promotion. e8=Q means "pawn moves to e8 and promotes to a queen."

Castling

Castling has its own special notation, since it moves two pieces (king and rook) in one move:

• O-O — kingside castling (the king's side of the board, toward g1/g8)
• O-O-O — queenside castling (toward c1/c8)

When two pieces could make the same move

If two identical pieces could both move to the same square, notation adds a disambiguating letter or number. Nbd7 means "the knight on the b-file moves to d7" — used specifically because another knight could also reach d7, so the file tells you which one moved.

A worked example

Here's the opening sequence of a real game, in standard notation, with what each move means:

1. e4 e5
2. Nf3 Nc6
3. Bb5 a6

• 1. e4 — White's pawn moves to e4.
• 1... e5 — Black's pawn moves to e5 in response.
• 2. Nf3 — White's knight moves to f3.
• 2... Nc6 — Black's knight moves to c6.
• 3. Bb5 — White's bishop moves to b5. (This particular sequence is the start of the Ruy Lopez, one of the oldest and most studied openings in chess.)
• 3... a6 — Black's pawn moves to a6, challenging the bishop.

That's the entire skill: piece letter (if any) + destination square, plus the handful of symbols above for captures, check, castling, and promotion.

Frequently asked questions

Why don't pawns get a letter in chess notation? Pawns are the default piece — if a move has no capital letter in front of it, it's assumed to be a pawn move. Every other piece needs its letter specifically because there'd otherwise be no way to tell them apart.

What does "e.p." mean in chess notation? It marks an en passant capture — a special pawn capture rule. You'll sometimes see it added after a move like exd6 e.p. for clarity, though many scoresheets omit it since the move itself is still legal and unambiguous without the tag.

Is algebraic notation the same worldwide? Yes, with minor regional variations in piece letters (some languages use their own initials — for example, "T" for "Tour" in French for Rook), but the coordinate system and overall structure are the same everywhere and universally understood by players and software alike.

Do I need to know notation to play chess online here? No — you can play entirely by clicking or dragging pieces. Notation becomes useful once you want to review your move history, study openings, or read chess books and analysis.

Once notation clicks, a whole world of chess writing opens up — try following along with a game against the AI and reading back your own move list afterward.