Hashiwokakero ©
Rules
You have to build bridges between the round islands top-down and from left to right so that in the end all islands are connected. Bridges must never cross each other. On each bridge there must be at least one lane but no more than two lanes. The numbers on each island indicate with how many lanes this island should be connected to other islands in total. Draw one line for each lane on the bridges!
Sample puzzles
EASY
MEDIUM
HARD
EVIL
All puzzles © by puzzlephil