Having looked at Keen's clue selection code, I also notice that the

[sgt/puzzles] / puzzles.but

diff --git a/puzzles.but b/puzzles.but
index 59cb128..a5dff8f 100644 (file)
--- a/puzzles.but
+++ b/puzzles.but
@@ -1965,7 +1965,7 @@ measured.
 \dd Allows you to choose between a selection of types of tiling.
 Some have all the faces the same but may have multiple different
 types of vertex (e.g. the \e{Cairo} or \e{Kites} mode); others have
-all the vertices the same but may have differnt types of face (e.g.
+all the vertices the same but may have different types of face (e.g.
 the \e{Great Hexagonal}). The square, triangular and honeycomb grids
 are fully regular, and have all their vertices \e{and} faces the
 same; this makes them the least confusing to play.
@@ -2493,10 +2493,10 @@ either way round, though.
 block of size two and means that one digit divided by the other is
 equal to the given amount.
 
-Note that a block may contain more than one digit the same (provided
-the identical ones are not in the same row and column). This rule is
-precisely the opposite of the rule in Solo's \q{Killer} mode (see
-\k{solo}).
+Note that a block may contain the same digit more than once
+(provided the identical ones are not in the same row and column).
+This rule is precisely the opposite of the rule in Solo's \q{Killer}
+mode (see \k{solo}).
 
 }
 
@@ -2682,12 +2682,12 @@ Singles was contributed to this collection by James Harvey.
 \IM{Singles controls} controls, for Singles
 
 Left-clicking on an empty square will colour it black; left-clicking again 
-will replace the number. Right-clicking will add a circle (useful for 
+will restore the number. Right-clicking will add a circle (useful for 
 indicating that a cell is definitely not black). 
 
 You can also use the cursor keys to move around the grid. Pressing the
 return or space keys will turn a square black or add a circle respectively,
-and pressing the key again will replace the number or remove the circle.
+and pressing the key again will restore the number or remove the circle.
 
 (All the actions described in \k{common-actions} are also available.)
 
@@ -2843,10 +2843,7 @@ These parameters are available from the \q{Custom...} option on the
 
 \dt \e{Width}, \e{Height}
 
-\dd Size of grid in squares. There will be half \e{Width} \by \e{Height}
-dominoes in the grid: if this number is odd then one square will be blank.
-
-(Grids with at least one odd dimension tend to be easier to solve.)
+\dd Size of grid in squares.
 
 \dt \e{Force start/end to corners}
 
@@ -2854,6 +2851,62 @@ dominoes in the grid: if this number is odd then one square will be blank.
 (the start at the top left, and the end at the bottom right). If false the start
 and end squares are placed randomly (although always both shown). 
 
+\C{range} \i{Range}
+
+\cfg{winhelp-topic}{games.range}
+
+You have a grid of squares; some squares contain numbers.  Your job is
+to colour some of the squares black, such that several criteria are
+satisfied:
+
+\b no square with a number is coloured black.
+
+\b no two black squares are adjacent (horizontally or vertically).
+
+\b for any two white squares, there is a path between them using only
+white squares.
+
+\b for each square with a number, that number denotes the number of
+squares reachable from that square going in each direction until
+hitting a wall or a black square.
+
+For instance, a square containing the number one must have four black
+squares as its neighbours by the last criterion; but then it's
+impossible for it to be connected to any outside white square, which
+violates the second to last criterion.  So no square will contain the
+number one.
+
+Credit for this puzzle goes to \i{Nikoli}, who have variously called
+it \q{Kurodoko}, \q{Kuromasu} or \q{Where is Black Cells}.
+\k{nikoli-range}.
+
+Range was contributed to this collection by Jonas K\u00F6{oe}lker.
+
+\B{nikoli-range}
+\W{http://www.nikoli.co.jp/en/puzzles/where_is_black_cells/}\cw{http://www.nikoli.co.jp/en/puzzles/where_is_black_cells/}
+
+\H{range-controls} \I{controls, for Range}Range controls
+
+Click with the left button to paint a square black, or with the right
+button to mark a square with a dot to indicate that you are sure it
+should \e{not} be painted black. Repeated clicking with either button
+will cycle the square through the three possible states (filled,
+dotted or empty) in opposite directions.
+
+You can also use the cursor keys to move around the grid squares.
+Pressing Return does the same as clicking with the left button, while
+pressing Space does the same as a right button click.
+
+(All the actions described in \k{common-actions} are also available.)
+
+\H{range-parameters} \I{parameters, for Range}Range parameters
+
+These parameters are available from the \q{Custom...} option on the
+\q{Type} menu.
+
+\dt \e{Width}, \e{Height}
+
+\dd Size of grid in squares.
 
 \A{licence} \I{MIT licence}\ii{Licence}