Saturday puzzles: masyu
Puzzle 1
1053 Masyu 10×10 RS 22-08-15
Draw a single closed loop that travels horizontally and vertically, passing through all circles in the grid. The loop must make a 90° angle in all black circles and go straight for at least two cells in both directions before turning again. The loop must go straight through all white circles and make a 90° angle in at least one of the neighbouring cells.