1) Logic puzzle 
Hashiwokakero (橋をかけろ Hashi o kakero; lit. `build bridges!`) is a type of logic puzzle published by Nikoli. It has also been published in English under the name Bridges or Chopsticks (based on a mistranslation: the hashi of the title, 橋, means bridge; hashi written with another character, 箸, means chopsticks). It has also appeared i.....