Half-open file

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Image:chess zhor 26.png
Image:chess zver 26.png a8 rd b8 c8 d8 qd e8 kd f8 bd g8 h8 rd Image:chess zver 26.png
a7 pd b7 pd c7 pd d7 bd e7 f7 pd g7 pd h7 pd
a6 b6 c6 nd d6 e6 pd f6 g6 h6
a5 b5 bl c5 d5 nd e5 f5 g5 h5
a4 b4 c4 d4 e4 f4 g4 h4
a3 b3 c3 nl d3 e3 f3 nl g3 h3
a2 pl b2 pl c2 pl d2 pl e2 f2 pl g2 pl h2 pl
a1 rl b1 c1 bl d1 ql e1 f1 rl g1 kl h1
Image:chess zhor 26.png

In chess, a half-open file, or semi-open file, is a file with no pawns of one color. In the diagram, the e-file is a half-open file for White, and the d-file is a half-open file for Black. A half-open file can provide a line of attack for a rook or queen.

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