Solution uniqueness for Net. Can be disabled on request (but is

[sgt/puzzles] / puzzles.but

diff --git a/puzzles.but b/puzzles.but
index 17bf476..bf2601b 100644 (file)
--- a/puzzles.but
+++ b/puzzles.but
@@ -90,18 +90,18 @@ menu}\q{Edit} menus instead.)
 
 \dd Starts a new game, with a random initial state.
 
 
 \dd Starts a new game, with a random initial state.
 

-\dt \ii\e{Restart game} (\q{R})
+\dt \ii\e{Restart game}

 
 

-\dd Resets the current game to its initial state. Undo is lost.
+\dd Resets the current game to its initial state. (This can be undone.)

 
 \dt \ii\e{Undo} (\q{U}, Ctrl+\q{Z}, Ctrl+\q{_})
 
 \dd Undoes a single move. (You can undo moves back to the start of the
 
 \dt \ii\e{Undo} (\q{U}, Ctrl+\q{Z}, Ctrl+\q{_})
 
 \dd Undoes a single move. (You can undo moves back to the start of the

-game.)
+session.)

 
 

-\dt \ii\e{Redo} (Ctrl+\q{R})
+\dt \ii\e{Redo} (\q{R}, Ctrl+\q{R})

 
 

-\dd Redoes a previous undone move.
+\dd Redoes a previously undone move.

 
 \dt \ii\e{Copy}
 
 
 \dt \ii\e{Copy}
 


@@ -346,6 +346,15 @@ barrier is placed between two tiles to prevent flow between them (a
 higher number gives more barriers). Since barriers are immovable, they
 act as constraints on the solution (i.e., hints).
 
 higher number gives more barriers). Since barriers are immovable, they
 act as constraints on the solution (i.e., hints).
 

+\dt \e{Ensure unique solution}
+
+\dd Normally, Net will make sure that the puzzles it presents have
+only one solution. Puzzles with ambiguous sections can be more
+difficult and more subtle, so if you like you can turn off this
+feature and risk having ambiguous puzzles. (Also, finding \e{all}
+the possible solutions can be an additional challenge for an
+advanced player.)
+

 \lcont{
 
 The grid generation in Net has been carefully arranged so that the
 \lcont{
 
 The grid generation in Net has been carefully arranged so that the


@@ -578,13 +587,13 @@ numbered square, and (b) the area of each rectangle is equal to the
 number written in its numbered square.
 
 Credit for this game goes to the Japanese puzzle magazine \i{Nikoli}
 number written in its numbered square.
 
 Credit for this game goes to the Japanese puzzle magazine \i{Nikoli}

-\k{nikoli-rect}; I've also seen a Palm implementation at \i{Puzzle Palace}
-\k{puzzle-palace-rect}. Unlike Puzzle Palace's implementation, my version
-automatically generates random grids of any size you like. The quality
-of puzzle design is therefore not quite as good as hand-crafted
-puzzles would be (in particular, a unique solution cannot be
-guaranteed), but on the plus side you get an inexhaustible supply of
-puzzles tailored to your own specification.
+\k{nikoli-rect}; I've also seen a Palm implementation at \i{Puzzle
+Palace} \k{puzzle-palace-rect}. Unlike Puzzle Palace's
+implementation, my version automatically generates random grids of
+any size you like. The quality of puzzle design is therefore not
+quite as good as hand-crafted puzzles would be, but on the plus side
+you get an inexhaustible supply of puzzles tailored to your own
+specification.

 
 \B{nikoli-rect} \W{http://www.nikoli.co.jp/puzzles/7/index_text-e.htm}\cw{http://www.nikoli.co.jp/puzzles/7/index_text-e.htm}
 
 
 \B{nikoli-rect} \W{http://www.nikoli.co.jp/puzzles/7/index_text-e.htm}\cw{http://www.nikoli.co.jp/puzzles/7/index_text-e.htm}