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 66
Note. — A Point Material always is situated eitherat one of the vertices or upon one of the sides of thezone of evolution. PLANE TOPOGRAPHY. 43 A Point of Interference is that point which is oc-cupied by the Disturbing Integer. A POINT OF INTERFERENCE. (P. I-) FionRB 37. Blaclc. … White. Note.—The point A is the Point of Interference inthis evolution, as it is the original post of the DisturbingFactor. 44 MAJOR TACTICS. The Tactical Front is composed of the Fronts Offen-sive, Defensive, Auxiliary, Supporting, and of Inter-ference. THE TACTICAL FRONT. (T. F.) Figure 38. Black.
Chess
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