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| author | Ben Harris <bjh21@bjh21.me.uk> | 2023-02-11 19:35:32 +0000 |
|---|---|---|
| committer | Ben Harris <bjh21@bjh21.me.uk> | 2023-02-11 19:35:32 +0000 |
| commit | ec84b45ba4a48bd4b50c98fdeffa13f836842be7 (patch) | |
| tree | f25a09fcad47297f409ffb7859cacc708e29dc11 /puzzles.but | |
| parent | ad2fb760fc881d1ceb1ac1151bf60b85deb16c71 (diff) | |
| download | puzzles-ec84b45ba4a48bd4b50c98fdeffa13f836842be7.zip puzzles-ec84b45ba4a48bd4b50c98fdeffa13f836842be7.tar.gz puzzles-ec84b45ba4a48bd4b50c98fdeffa13f836842be7.tar.bz2 puzzles-ec84b45ba4a48bd4b50c98fdeffa13f836842be7.tar.xz | |
Mention how old the 15-puzzle is
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.
Diffstat (limited to 'puzzles.but')
| -rw-r--r-- | puzzles.but | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/puzzles.but b/puzzles.but index 9791ead..d56d26c 100644 --- a/puzzles.but +++ b/puzzles.but @@ -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 |