Greatly increase the speed of the Filling solver.

[sgt-puzzles.git] / puzzles.but

diff --git a/puzzles.but b/puzzles.but
index 2c8f91b143e3ffe69246fe94cef9a966acea613b..113f46256be171778038453c9254e7bac7c8987f 100644 (file)
--- a/puzzles.but
+++ b/puzzles.but
@@ -2652,7 +2652,8 @@ Pressing M will fill in a full set of pencil marks in every square
 that does not have a main digit in it.
 
 Left-clicking a clue will mark it as done (grey it out), or unmark it
-if it is already marked.
+if it is already marked.  Holding Control or Shift and pressing an
+arrow key likewise marks any clue in the given direction.
 
 (All the actions described in \k{common-actions} are also available.)