X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/aafaa7fbd122f8109c1a7d99faf74d4892bf22de..e9f8a17fe682e455dff18a9dbdb1310d18d2dc1f:/puzzles.but

diff --git a/puzzles.but b/puzzles.but
index e468df5..13056d7 100644
--- a/puzzles.but
+++ b/puzzles.but
@@ -959,11 +959,6 @@ Removing a region causes the rest of the grid to shuffle up:
 blocks that are suspended will fall down (first), and then empty
 columns are filled from the right. 
 
-The game generator does not try to guarantee soluble grids;
-it will, however, ensure that there are at least 2 squares of each 
-colour on the grid at the start (and will forbid custom grids for which
-that would be impossible).
-
 Same Game was contributed to this collection by James Harvey.
 
 \H{samegame-controls} \i{Same Game controls}
@@ -1009,6 +1004,23 @@ any points at all. With the alternative \q{(n-1)^2} system, regions of
 two squares score a point each, and larger regions score relatively
 more points.
 
+\dt \e{Ensure solubility}
+
+\dd If this option is ticked (the default state), generated grids
+will be guaranteed to have at least one solution.
+
+\lcont{
+
+If you turn it off, the game generator will not try to guarantee
+soluble grids; it will, however, still ensure that there are at
+least 2 squares of each colour on the grid at the start (since a
+grid with exactly one square of a given colour is \e{definitely}
+insoluble). Grids generated with this option disabled may contain
+more large areas of contiguous colour, leading to opportunities for
+higher scores; they can also take less time to generate.
+
+}
+
 
 \C{flip} \i{Flip}
 
@@ -1377,11 +1389,22 @@ When an appropriate number of balls have been guessed a button will
 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
-circles.  Incorrectly-placed balls are displayed as filled black
-circles with red crosses, and missing balls are filled red circles.
-In addition, a red circle marks any laser you had already fired
-which is not consistent with your ball layout, and red text marks
+If you click the \q{mark} button and your guesses are not correct,
+the game will show you as little information as possible to
+demonstrate this to you, so you can try again. If your ball
+positions are not consistent with the laser paths you already know
+about, one laser path will be circled to indicate that it proves you
+wrong. If your positions match all the existing laser paths but are
+still wrong, one new laser path will be revealed (written in red)
+which is not consistent with your current guesses.
+
+If you decide to give up completely, you can select Solve to reveal
+the actual ball positions. At this point, correctly-placed balls
+will be displayed as filled black circles; incorrectly-placed balls
+are displayed as filled black circles with red crosses, and missing
+balls are filled red circles. In addition, a red circle marks any
+laser you had already fired which is not consistent with your ball
+layout (just as when you press the mark button), and red text marks
 any laser you \e{could} have fired in order to distinguish your ball
 layout from the right one.