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* [[Pieces versus Directions]]
* [[Vector Attacks]]
* [[Files#TwoSquares|Two Squares on a File]]
* [[Ranks#TwoSquares|Two Squares on a Rank]]
* [[Diagonals#TwoSquares|Two Squares on a Diagonal]]
* [[Anti-Diagonals#TwoSquares|Two Squares on a Anti-Diagonal]]
=Forum Posts=
* [http://www.talkchess.com/forum/viewtopic.php?t=48322 Extract direction (ray) informations from two squares] by [[Mathieu Pagé]], [[CCC]], June 18, 2013 » [[Rays]], [[Square Attacked By]]
* [http://talkchess.com/forum3/viewtopic.php?f=7&t=74821 An undetected bug for 10 years] by [[Oliver Brausch]], [[CCC]], August 18, 2020 » [[Diagonals#TwoSquares|Two Squares on a Diagonal]]
=External Links=
