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 135
White. White to move, both to queen a pawn. 112 MAJOR TACTICS. PEOPOSITION VII. Theorem. Given a Square of Progression Positive (S. P. P.)whose net area is less by one horizontal than the netarea of the adverse Square of Progression Negative(S. P. N.), then, if the Primary Origins (P. 0.) are… … White. White to move and queen a pawn and prevent the adverse pawnfrom queening. BASIC PROPOSITIONS. 113 PROPOSITION VIII.—Theorem. Given a Square of Progression Positive (S. P. P.)opposed to a knights octagon, then, if the DisturbingFactor (D. P.) is situated without the correspondino-Knights…
Chess
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