In preparation for this years german logic puzzle championship, I constructed a few puzzles which will be put online in the next few weeks.
Rules: Draw a closed loop through some of the cells that doesn't touch or cross itself. Black cells lie outside, boldly ordered white cells inside the loop. Numbers indicate the number of line segments in the direction of the arrow.
Link for online solvingSolution code: Second to last row: I for a straight line, L for a 120° corner, V for a 60° corner, X for an empty cell