Young, Franklin Knowles, 1857- [from old catalog] · Boston, Little, Brown, and company · leaf 154
White. STRATEGIC HORIZONS. 123 A strategic horizon 13 is expressed by three adjacentpoints situated on the same vertical, the central onebeing the strategic key and the extremities being eithertactical keys or points of command in evolutions apper-taining to the R, Q, or K. This horizon is… … White. 124 CHESS STRATEGETICS. A strategic liorizon 1-i is expressed bj the geometricsymbol of the Q, the centre being the strategic key andthe extremities being either tactical keys or points ofcommand in evolutions appertaining to the Q. Thishorizon is designated by the letter P, and can…
Chess
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