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 45
20 MAJOR TACTICS. LOGISTIC SYMBOL OF THE BISHOP. FIGURE 16. Black. … White. NOTE. — The logistic radii of a piece all unite at the centre of its geometric symbol.
Chess
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