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 145
White to move and queen a pawn. 122 MAJOR TACTICS. Figure 103.(6.) … White.White to move and queen a pawn. BASIC PROPOSITIONS. 123 PROPOSITION XII. —Theorem. Given a Geometric Symbol Positive (G. S. P.) or acombination of Geometric Symbols Positive which iscoincident with the Objective Plane ; then, if the PrimeTactical Factor (P. T. F.) can be posted at the Point…
Chess
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