Young, Franklin Knowles, 1857- [from old catalog] · Boston, Little, Brown, and company · leaf 138
etwo tactical keys, or by combining the strategic keywith the two points whence these tactical keys arecommanded. This mathematical figure is termed in this theory theStrategic Horizon^ and these strategic horizons, it is im-portant for the student to observe, are divided into threeclasses, viz.: —… … White. Note. — The White Kt occupies the strategic key.The Black K B and R occupy the tactical keys. 108 CHESS STRATEGETICS. 11. Strategic Horizons in which the three vertices area strategic key, a tactical key, and a point of command. STRATEGIC HORIZON. (6.) FlGUEE 57. Black.
Chess
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