The major tactics of chess: a treatise on evolutions; the proper employment of the forces in strategic, tactical, and logistic planes (1898)
Young, Franklin Knowles, 1857- · Boston, Little, Brown and company · leaf 60
White. Note. — The xiuxiliary Factor may be situated atany point and either within or outside of the zone ofevolution. PLANE TOPOGRAPHY. 37 The PieceExposed is that adverse integer of chessforce whose capture in a given evolution may bemathematically demonstrated. THE PIECE EXPOSED.(P. E.) ElGUEE… … White. Note. — The Piece Exposed always is situated eitherupon one of the sides or at one of the vertices of thezone of evolution. 38 MAJOR TACTICS. A Disturbing Integer is an adverse piece whichprevents the Prime Tactical Factor from occupying thePoint of Command, or the Supporting Factor…
Chess
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