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The bridge and torch problem (also known as The Midnight Train [1] and Dangerous crossing [2]) is a logic puzzle that deals with four people, a bridge and a torch. It is in the category of river crossing puzzles , where a number of objects must move across a river, with some constraints.
Since the boat and all of the missionaries and cannibals start on the wrong side, the vector is initialized to 3,3,1 . Actions are represented using vector subtraction/addition to manipulate the state vector. For instance, if a lone cannibal crossed the river, the vector 0,1,1 would be subtracted from the state to yield 3,2,0 .
The two solutions with the vertical axis denoting time, and brown, grey, green and beige paths denoting the wolf, goat, cabbage and boat, respectively The first step that must be taken is to let the goat go across the river, as any other actions will result in the goat or the cabbage being eaten.
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It always ends with a "Final Crossing" segment in which the contestants who successfully crossed the bridge must earn the accumulated cash prize by crossing another bridge, selecting the true statement amongst the wrong ones a number of times; these statements are all "general knowledge" rather than corresponding to a category. [2]
Hashiwokakero (橋をかけろ Hashi o kakero; lit. "build bridges!") is a type of logic puzzle published by Nikoli. [1] 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).
A river crossing puzzle is a type of puzzle in which the object is to carry items from one river bank to another, usually in the fewest trips. The difficulty of the puzzle may arise from restrictions on which or how many items can be transported at the same time, or which or how many items may be safely left together. [ 1 ]
Crossings is a two-player abstract strategy board game invented by Robert Abbott. The rules were published in Sid Sackson 's A Gamut of Games . Crossings was the precursor to Epaminondas , which uses a larger board and expanded rules.