Anvil
Two large half-square triangles meet at the centre on one diagonal; the other two quarters each hold a square, a background square and two small triangles.
Balkan Puzzle
Sixteen half-square triangles: a square on point in the centre, framed by triangles, with two sets of geese chasing each other around the edges in a pinwheel.
Barbara Frietchie Star
Sixteen half-square triangles: pairs along each edge make eight star points, the corners are triangles, and the centre four units form a pinwheel.
Big Dipper
Four hourglass units, each turned a quarter from its neighbours, so the dark triangles form a pinwheel at the centre and another around the edges.
Bow Tie
Two tie squares on one diagonal and two background squares whose centre corners are stitched-and-flipped in the tie fabric, so a small square knot forms where they meet.
Buckeye Beauty
Two large half-square triangles and two four-patches; the dark squares line up into a diagonal chain from corner to corner, framed by the light halves of the triangles.
Clay's Choice
A four-by-four block of squares and half-square triangles: long dark blades spin around a small centre pinwheel, with a square in each corner.
Crosses and Losses
Two large half-square triangles on one diagonal alternate with two small quarters of two half-square triangles and two plain squares; the large dark triangles point into the centre.
Double Four Patch
A large four-patch whose top-left and bottom-right quarters are small four-patches and whose other two quarters are plain squares, so the small checks run corner to corner.
Dutchman's Puzzle
Eight flying-geese units in four pairs; each quarter holds two geese flying the same way, and the quarters turn around the centre like a pinwheel.
Eight Hands Around
A small sawtooth star in the centre, ringed by background geese with dark wings and dark corner triangles, on an eight-by-eight grid.
Four Patch
Four equal squares in two rows, light and dark alternating so each colour sits on one diagonal.
Hovering Hawks
A four-by-four grid of plain squares and ten half-square triangles whose seams all run the same way; two groups of five dark triangles face each other across the diagonal.
Kansas Troubles
Four quarters turned around the centre; each is split on the diagonal into a large plain triangle and a pieced triangle whose mid-size triangle is edged with small sawtooth triangles.
Old Maid's Puzzle
Two large triangles meet at the centre along one diagonal, each with a small triangle tucked into its corner; the other two quarters hold pairs of small triangles facing each other across the other diagonal.
Pinwheel
Four half-square triangles turned so their seams run from the corners to the centre and the dark halves spin around the middle like the sails of a toy pinwheel.
Rising Star
A sawtooth star whose centre square is itself a smaller sawtooth star, drawn on an eight-by-eight grid.
Road to Oklahoma
A four-by-four grid with a chain of dark squares from one corner to the opposite corner, crossed by pairs of dark half-square triangles near the other two corners; a four-patch sits in the middle.
Sawtooth Star
A four-by-four star: a large centre square, four flying-geese units whose small triangles make eight star points, and plain corner squares.