Young, Franklin Knowles, 1857- [from old catalog] · Boston, Little, Brown, and company · leaf 188
gic Key is that vertex of a mathematicalfigure of which either two points of command, or twotactical keys, or a tactical key and a point of commandare the other two vertices (see this volume, p. 88). The Strategic Vertices are those points on the peri-meter of that geometric symbol of an integer of… … White. Note. — The Strategic Horizon consists of BlacksK 4, and the points occupied by the R and B. TheStrategic Key is Blacks K 4, and this point, togetherwith the Tactical Keys (Black K Kt 3 and Q B 5) con-stitute the Strategic Vertices. 158 CHESS STRATEGETICS. The Objective Plane already has…
Chess
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