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authorFranklin Wei <git@fwei.tk>2017-04-29 18:21:56 -0400
committerFranklin Wei <git@fwei.tk>2017-04-29 18:24:42 -0400
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parent03dd4b92be7dcd5c8ab06da3810887060e06abd5 (diff)
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puzzles: refactor and resync with upstream
This brings puzzles up-to-date with upstream revision 2d333750272c3967cfd5cd3677572cddeaad5932, though certain changes made by me, including cursor-only Untangle and some compilation fixes remain. Upstream code has been moved to its separate subdirectory and future syncs can be done by simply copying over the new sources. Change-Id: Ia6506ca5f78c3627165ea6791d38db414ace0804
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+Pearl
+<p>
+Draw a single closed loop by connecting together the centres of
+adjacent grid squares, so that some squares end up as corners, some as
+straights (horizontal or vertical), and some may be empty. Every
+square containing a black circle must be a corner not connected
+directly to another corner; every square containing a white circle
+must be a straight which is connected to <em>at least one</em> corner.
+<p>
+Drag between squares to draw or undraw pieces of the loop.
+Alternatively, left-click the edge between two squares to turn it on
+or off. Right-click an edge to mark it with a cross indicating that
+you are sure the loop does not go through it.