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Learn · lesson 2 of 8 · Pawn endgames

Rule of the square

If the king is inside the pawn's square it catches it. Otherwise the pawn runs through.

White to move: White wins Black to move: Draw

Basic position: Rule of the square – White: Ka1, b5; Black: Kf48a7b6c5d4e3f2g1h
Basic position: Rule of the square – White: Ka1, b5; Black: Kf48a7b6c5d4e3f2g1h

Starting position. “Next” plays it move by move.

Pawn endgames · Pawn endgame

The position and its key

If the king is inside the pawn's square it catches it. Otherwise the pawn runs through.

The verdict

White to move: White wins Black to move: Draw

The key

1.b6

Rule of the square

How to recognize it

  1. A passed pawn, no king near it
  2. Picture a square from the pawn to its queening rank
  3. If the king can step into the square with its move, it catches the pawn
  4. From its starting square the pawn may move two squares: there the square starts one rank further up

Rule of the square

In our databases

Games in which exactly this kind of position stood on the board – recognized by material and the places of the pieces, each confirmed by the tablebase. Counted from the stronger side's view.

50games reached it
100 %won by the stronger side
0 %ended in a draw
0 %lost by the stronger side

Often comes from these openings

A45 Indian Defense 3 C77 Ruy Lopez: Morphy Defense 2 E61 King's Indian Defense 2 B20 Sicilian Defense 2 C10 French Defense: Paulsen Variation 2

Examples – the great players first

Position from Ding Liren – Le Quang Liem · 2nd IMSA Basque 2017 – White: Kc5, b7; Black: Ke58a7b6c5d4e3f2g1h
Stronger side won Ding Liren – Le Quang Liem · 2nd IMSA Basque 2017 · after move 57
Position from D. Navara – Parham Maghsoodloo · Lindores Abbey Tal Mem, 2021 – White: Kd2, a4; Black: Kf28a7b6c5d4e3f2g1h
Stronger side won D. Navara – Parham Maghsoodloo · Lindores Abbey Tal Mem, 2021 · after move 83
Position from Viktor Kortschnoj – Vassily Ivanchuk · Roquebrune rapid, 1992 – White: Kh7; Black: Ke7, f58a7b6c5d4e3f2g1h
Stronger side won Viktor Kortschnoj – Vassily Ivanchuk · Roquebrune rapid, 1992 · after move 82
Position from Paul Keres – Vladimirs Petrovs · Warsaw ol (Men), 1935 – White: Kf1, b2; Black: Kh38a7b6c5d4e3f2g1h
Stronger side won Paul Keres – Vladimirs Petrovs · Warsaw ol (Men), 1935 · after move 55
Position from Paul F. Johner – Luigi Miliani · Trieste, 1923 – White: Kg4, h6; Black: Kd68a7b6c5d4e3f2g1h
Stronger side won Paul F. Johner – Luigi Miliani · Trieste, 1923 · after move 74
Position from Siegbert Tarrasch – Horatio Caro · Vienna, 1898 – White: Kd5, h6; Black: Kc28a7b6c5d4e3f2g1h
Stronger side won Siegbert Tarrasch – Horatio Caro · Vienna, 1898 · after move 65