Single rook tracking two advanced connected passed pawns.
Why it matters
Two connected passed pawns on the sixth rank beat a rook. The rook cannot stop both, because whichever one it attacks, the other advances and the two support each other into promotion.
That single fact decides a lot of endgames long before it happens. It is why a rook is worth giving up for two advanced pawns, and why the defender must stop them on the fifth rank rather than the sixth.
See it on a board
Neither pawn can be stopped without letting the other one go. The rook is spent stopping one pawn while the other promotes.
Checked: this line wins at least 7 pawns of material.
How to play it
- As the attacker, advance the pawns side by side and get them both to the sixth.
- Push the one the rook is not watching, and let the other defend it.
- As the defender, blockade them before the sixth rank, and use the king. A rook alone cannot hold them.
At each level
The same idea, said the way it is taught at each age.
Rook · ages 6–9
Two pawns side by side on the sixth rank beat a rook. Stop them earlier, or bring your king.
Queen · ages 8–11
The exchange calculation follows from it. Giving up a rook for two pawns is right when they reach the sixth with the enemy king far away, and wrong otherwise.
What goes wrong
- Letting connected pawns reach the sixth rank while the king is on the other side of the board.
- Taking one pawn with the rook without checking whether the other one queens.
Questions people ask
- What about two pawns on the fifth rank?
- A rook usually holds them, and often wins them, provided it gets in front. The sixth rank is the line where the balance flips.