Some attempt to explain Dominosa for those unfamiliar with dominos. (Not sure

[sgt/puzzles] / puzzles.but

diff --git a/puzzles.but b/puzzles.but
index bc8e4bf..9949da4 100644 (file)
--- a/puzzles.but
+++ b/puzzles.but
@@ -1197,7 +1197,8 @@ time (but always one that is known to have a solution).
 
 \cfg{winhelp-topic}{games.dominosa}
 
-A normal set of dominoes has been arranged irregularly into a
+A normal set of dominoes - that is, one instance of every (unordered)
+pair of numbers from 0 to 6 - has been arranged irregularly into a
 rectangle; then the number in each square has been written down and
 the dominoes themselves removed. Your task is to reconstruct the
 pattern by arranging the set of dominoes to match the provided array
@@ -1298,9 +1299,9 @@ the following ways:
 \b A laser that would re-emerge from the entry location is considered to be
    \q{reflected}. 
 
-\b A laser which would get deflected down the laser firing range is also
-   considered to be \q{reflected}; this means that a ball to the front-left
-   or front-right of a laser's entry point will reflect the laser. 
+\b A laser which would get deflected before entering the arena (down the
+   \q{firing range}) by a ball to the front-left or front-right of its
+   entry point is also considered to be \q{reflected}.
 
 Lasers that are reflected appear as a \q{R}; lasers that hit balls
 dead-on appear as \q{H}. Otherwise, a number appears at the firing point
@@ -1374,7 +1375,7 @@ right-clicking in the laser firing range above/below that column, or
 to the left/right of that row.  
 
 When an appropriate number of balls have been guessed a button will
-appear at the top-right corner of the grid; clicking that will mark
+appear at the top-left corner of the grid; clicking that will mark
 your guesses. 
 
 Once marked, correctly-placed balls are displayed as filled black