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The "nine dots" puzzle. The puzzle asks to link all nine dots using four straight lines or fewer, without lifting the pen. The nine dots puzzle is a mathematical puzzle whose task is to connect nine squarely arranged points with a pen by four (or fewer) straight lines without lifting the pen or retracing any lines.
In 1970, the phrase think outside the dots appears without mentioning the nine dots puzzle. [13] [7] Finally, in 1971, the specific phrase think outside the box is attested, again appearing together with the nine dots puzzle. [14] [15] In 1976, the phrase is used in England [16] and 1978 in the USA, [17] both without mentioning the nine dots ...
The Nine Dots Puzzle is the first known puzzle game where the player has to connect dots. But in this variant the goal is not to draw a picture, but to solve a logic puzzle . The emergence of connect the dots games in the printed press takes place in the early 20th century.
I suggest that the "Nine dots puzzle" section (and its subsections about solving in three dimensions, and a prize that was named after it) be split into a separate article at Nine dots puzzle. It's a classic puzzle with a strong and sourceable pedigree beyond its connection to the 1970s management jargon, which it pre-dates by some sixty years.
The term was first used in 1967 by Maltese psychologist Edward de Bono who used the Judgement of Solomon, the Nine Dots Puzzle, and the sewing machine (automating the work rather than adding more workers) as examples, among many others, of lateral thinking. [2]
Added a brief introduction to the extension of the classic planar version of the puzzle to higher dimensions. I avoided citing some references, but I can provide many of them by request (please, let me know).
0–9. 17-animal inheritance puzzle; B. ... Nine dots puzzle; T. Three utilities problem; Tower of Hanoi This page was last edited on 7 March 2021, at 01:25 (UTC) ...
Solution of the Nine Dots puzzle: Date: 25 July 2009: Source: Own work based on: Ninedots-2.png: Author: Original: Smerdis of Tlön ...