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 37
White. Note. — If the piece has the move, the sub-geometricsymbol is positive ; otherwise, it is negative. 14 MAJOR TACTICS. SUB-GEOMETRIC SYMBOL OF THE BISHOP. … White. Note. — The sub-geometric symbol is tlie mathe-matical figure common to situations in which the de-cisive blow is preparing. GEOMETRIC SYMBOLS. 15 SUB-GEOMETEIC SYMBOL OF THE ROOK,Figure 11. Black.
Chess
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