This is in perfect keeping with the law of continuity, which acts and dominates from beginning to end of the series, and so long as any part of X remains. Hence to permit either White or Black to move any piece, leaving his King in check, is an anomaly. * * * * * Denial to the Pawn of ability to move to the rear is an accurate interpretation of military ethics. Of those puerile hypotheses common to the man who does not know, one of the most entrancing to the popular mind, is the notion that Corps d’armee properly are of equal numbers and of the same composition. This supposition is due to ignorance of the fact that the multifarious duties of applied Strategetics, require for their execution like variety of instruments, which diversity of means is strikingly illustrated by the differing movements of the Chess-pieces. The inability of the Pawn to move backward strategically harmonizes with its functions as a Corps of Position, in contradiction to the movements of the pieces, which latter are Corps of Evolution. This restriction in the move of the Pawn is in exact harmony with the inability of the Queen to move on obliques, of the Rook to move on obliques or on diagonals, of the Bishop to move on obliques, verticals and horizontals, of the Knight to move on diagonals, verticals, and horizontals, and of the King to move like any other piece. * * * * * Possessed of the invaluable privilege of making the first move in the game, knowing that no move should be made without an object, understanding that the true object of every move is to minimize the adverse power for resistance and comprehending that all power for resistance is derived from facility of movement, the student easily deduces the true object of White’s initial move in every game of Chess, viz.: PRINCIPLE _To make the first of a series of movements, each of which shall increase the mobility of the kindred pieces and correspondingly decrease the mobility of the adverse pieces._ As the effect of such policy, the power for resistance appertaining to Black, ultimately must become so insufficient that he no longer will be able adequately to defend: 1. His base of operations. 2. The communications of his army with its base. 3. The communications of his corps d’armee with each other, or, 4. To prevent the White hypothetical force penetrating to its Logistic Horizon. To produce this fatal weakness in the Black position by the advantage of the first move is much easier for White than commonly is supposed. The process consists in making only those movements by means of which the kindred corps d’armee, progressively occupying specified objectives, are advanced, viz.: I. _To the Strategetic Objective, when acting against the communications of the adverse Determinate Force and its Base of Operations._