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The rule of the square

Can the king catch the pawn? Draw a square and you know at once.

Beginner · Pawn endgames · 3 steps. On Chess Castles, Chess Guru reads each step aloud in English, Hindi or Marathi while the moves play on the board, and you can practise any position against the engine.

Step 1

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The position

To know if a king can catch a running pawn, imagine a square from the pawn to the last rank. Here it is a5, a1, e1, e5. If the king can step inside this square, it catches the pawn. The white king on d2 is inside.

Step 2

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The position before the moves

Moves: 1.Kc3 Kg7 2.Kb3 Kf6 3.Ka4 Ke6 4.Kxa5 Ke5 5.Ka4 Ke4

The king steps toward the corner and catches the pawn. Draw.

Step 3

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The position before the moves

Moves: 1.Kf1 a4 2.Ke1 a3 3.Kd2 a2 4.Ke2 a1=Q 5.Kd3 Kg7

Now the white king on g2 is outside the square. However fast it runs, the pawn is quicker and becomes a queen.

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