6.BG. QUADRISECT A PAPER SQUARE WITH ONE CUT
This involves careful folding. One can also make mn rectangles with a single cut.
Mittenzwey. 1880. Prob. 193 & 194, pp. 36 & 89; 1895?: 218 & 219, pp. 41 & 91; 1917: 218 & 219, pp. 37 & 87. Make four squares. Make four isosceles right triangles.
Walter Gibson. Big Book of Magic for All Ages. Kaye & Ward, Kingswood, Surrey, 1982. Tick-tack-toe, pp. 68-69. Take a 4 x 4 array and mark alternate squares with Xs and Os. By careful folding and cutting, one produces eight free squares and a connected lattice of the other eight squares, with the free squares being either all the Os or all the Xs, depending on how the final part of the cut is made.
David Singmaster. Square cutting. Used in my puzzle columns.
Weekend Telegraph (18 & 25 Mar 1989) both p. xxiii.
G&P, No. 16 (Jul 1995) 26. (Publication ceased with No. 16.)
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