Progress, measured by understanding.

The Board

Files, ranks, diagonals and how squares are named.

The Pieces

What each piece is and what it is worth.

How Pawns Move

Forward one, two from home, capture diagonally.

How Knights Move

The L-shape, and why knights jump.

How Bishops Move

Diagonals, forever on one colour.

How Rooks Move

Files and ranks, strongest when open.

How Queens Move

Rook and bishop combined.

How Kings Move

One square, and never into danger.

Capturing

Taking material and counting the trade.

Check

Attacking the king — and the three legal answers.

Checkmate

Check with no escape.

Development

Bringing pieces into the game quickly.

Control the Center

Why the four central squares decide games.

King Safety

Getting the king out of the crossfire.

Castling

The one move where two pieces travel.

Piece Value

9, 5, 3, 3, 1 — and when values lie.

Forks

One piece attacking two targets at once.

Pins

A piece frozen by what sits behind it.

Skewers

The pin, reversed — big piece in front.

Double Attacks

Two threats, one move.

Discovered Attacks

Moving one piece to unleash another.

Avoiding Hanging Pieces

Undefended pieces lose games.

En Passant

Chess's strangest legal capture.

Pawn Structure

The skeleton every plan hangs on.

Open Files

Highways for rooks.

Outposts

A protected square deep in enemy ground.

Tempo

Time as a chess currency.

Mate in One

Seeing the finish.

Back Rank Mate

Punishing a wall of pawns.

Removing the Defender

Break the guard, take the prize.

Pawn Promotion

A pawn's long walk to a queen.

Opposition

The kings' silent standoff.

King + Rook Mate

Driving the king to the edge.

King + Queen Mate

The box, then the finish.

Passed Pawns

Pawns with nothing in their way.

Opening Principles

Center, development, king safety.