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 114
White.Either to move and win a piece. BASIC PROPOSITIONS. 91 PEOPOSITION II. — Theorem. Given a Geometric Symbol Negative (G. S. N.) hav-ing two or more Points Material Active (P. M. A.), thenthe kindred Prime Tactical Factor (P. T. F.) wins anadverse piece. … White.Black to move, white to win a piece. Note — Black, even with the move, can vacate onlyone of the vertices of the wliite geometric symbol.Therefore the remaining black piece is lost, according toProp. I. 92 MAJOR TACTICS. Figure 79. (6.)Black.
Chess
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