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Mention how old the 15-puzzle is

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For most puzzles, the manual tries to at least mention its origin.
Wikipedia suggests that the precise inventor of the 15-puzzle is a bit
uncertain, but US patent number 207124 definitely describes it in
1878, so "dates from the 1870s" seems pretty solid.
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Ben Harris
2023-02-11 19:35:32 +00:00
parent ad2fb760fc
commit ec84b45ba4
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@ -601,7 +601,8 @@ respectively.
\cfg{winhelp-topic}{games.fifteen}
The old ones are the best: this is the good old \q{\i{15-puzzle}}
with sliding tiles. You have a 4\by\.4 square grid; 15 squares
with sliding tiles, which dates from the 1870s.
You have a 4\by\.4 square grid; 15 squares
contain numbered tiles, and the sixteenth is empty. Your move is to
choose a tile next to the empty space, and slide it into the space.
The aim is to end up with the tiles in numerical order, with the