Philidor Position - Rook and Bishop Versus Rook

Rook and Bishop Versus Rook

Philidor, 1749
a b c d e f g h
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
a b c d e f g h
White to move wins (checkmate in 19 moves with optimal play).

Another famous position studied by and named after Philidor is in the ending of a rook and bishop versus a rook (diagram). White wins because his king has reached the sixth rank and black's king is poorly placed (opposite the white king) (Howell 1997:148–50). If this type of position arises, it is usually because of inferior defense. Nevertheless, it is tricky to win (Nunn 2007:163).

Read more about this topic:  Philidor Position

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