Page:How to Play Chess (Rogers).djvu/153

Rh This example of a Middle Game position resulting in a perpetual check is most ingenious and must have been wholly unexpected to the players. While Black had the original advantage, he lost it by his first move. His object, evidently, was to queen his Pawn, but his first move was weak and caused him to lose what he had gained by his opening moves.

—Illustrates the advantages and disadvantages of open files.

White's forces should be arranged thus:—K on QBsq., Q on QB4, Kt. on KR4, Rs on KRsq. and Qsq., and Ps on KKt.2, KKt.4, K5, QB3 and QR2.

Black's forces should be arranged thus:—K on KRsq., Q on KB2, Kt. on QR3, Rs on QRsq. and KBsq., and Ps on KR2, KKt.2, QB3, QKt.2 and QR2. (See DIAGRAM XXVI.)

The student will note from the position of White's King that the player has evidently castled with his QR. White plays