X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/c0edd11f62b378695f9fbddbc4da8e0dd18c9ee6..1507058f4e2f6d72ffbf3b342d280f8702b1cfb6:/puzzles.but

diff --git a/puzzles.but b/puzzles.but
index bf2601b..9635e20 100644
--- a/puzzles.but
+++ b/puzzles.but
@@ -286,12 +286,14 @@ missing. See \k{common-id} for more details on this.)
 \i\cw{NETGAME.EXE} to avoid clashing with Windows's own \cw{NET.EXE}.)
 
 I originally saw this in the form of a Flash game called \i{FreeNet}
-\k{FreeNet}, written by Pavils Jurjans. The computer prepares a
+\k{FreeNet}, written by Pavils Jurjans; there are several other
+implementations under the name \i{NetWalk}. The computer prepares a
 network by connecting up the centres of squares in a grid, and then
 shuffles the network by rotating every tile randomly. Your job is to
 rotate it all back into place. The successful solution will be an
-entirely connected network, with no closed loops. \#{Is it also true
-that a correct solution will not contain any cycles?} As a visual aid,
+entirely connected network, with no closed loops. \#{The latter
+clause means that there are no closed paths within the network.
+Could this be clearer? "No closed paths"?} As a visual aid,
 all tiles which are connected to the one in the middle are
 highlighted. 
 
@@ -318,6 +320,21 @@ controls are:
 also unlock it again, but while it's locked you can't accidentally
 turn it.
 
+The following controls are not necessary to complete the game, but may
+be useful:
+
+\dt \e{Shift grid}: Shift + arrow keys
+
+\dd On grids that wrap, you can move the origin of the grid, so that
+tiles that were on opposite sides of the grid can be seen together.
+
+\dt \e{Move centre}: Ctrl + arrow keys
+
+\dd You can change which tile is used as the source of highlighting.
+(It doesn't ultimately matter which tile this is, as every tile will
+be connected to every other tile in a correct solution, but it may be
+helpful in the intermediate stages of solving the puzzle.)
+
 \dt \e{Jumble tiles}: \q{J} key
 
 \dd This key turns all tiles that are not locked to random
@@ -346,15 +363,6 @@ 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).
 
-\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
@@ -370,6 +378,15 @@ from the original Net window.
 
 }
 
+\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.)
+
 \C{cube} \i{Cube}
 
 \cfg{winhelp-topic}{games.cube}
@@ -613,15 +630,23 @@ When a rectangle of the correct size is completed, it will be shaded.
 
 \H{rectangles-params} \I{parameters, for Rectangles}Rectangles parameters
 
-The \q{Custom...} option on the \q{Type} menu offers you \e{Width}
-and \e{Height} parameters, which are self-explanatory.
+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.
+
+\dt \e{Expansion factor}
 
-\q{Expansion factor} is a mechanism for changing the type of grids
-generated by the program. Some people prefer a grid containing a few
-large rectangles to one containing many small ones. So you can ask
+\dd This is a mechanism for changing the type of grids generated by
+the program. Some people prefer a grid containing a few large
+rectangles to one containing many small ones. So you can ask
 Rectangles to essentially generate a \e{smaller} grid than the size
 you specified, and then to expand it by adding rows and columns.
 
+\lcont{
+
 The default expansion factor of zero means that Rectangles will
 simply generate a grid of the size you ask for, and do nothing
 further. If you set an expansion factor of (say) 0.5, it means that
@@ -636,6 +661,17 @@ and more intuitive playing style. If you set it \e{too} high,
 though, the game simply cannot generate more than a few rectangles
 to cover the entire grid, and the game becomes trivial.
 
+}
+
+\dt \e{Ensure unique solution}
+
+\dd Normally, Rectangles 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. Turning off this option can also speed up puzzle generation.
+
 
 \C{netslide} \i{Netslide}
 
@@ -739,6 +775,23 @@ type a digit or letter on the keyboard to fill that square. If you
 make a mistake, click the mouse in the incorrect square and press
 Space to clear it again (or use the Undo feature).
 
+If you \e{right}-click in a square and then type a number, that
+number will be entered in the square as a \q{pencil mark}. You can
+have pencil marks for multiple numbers in the same square.
+
+The game pays no attention to pencil marks, so exactly what you use
+them for is up to you: you can use them as reminders that a
+particular square needs to be re-examined once you know more about a
+particular number, or you can use them as lists of the possible
+numbers in a given square, or anything else you feel like.
+
+To erase a single pencil mark, right-click in the square and type
+the same number again.
+
+All pencil marks in a square are erased when you left-click and type
+a number, or when you left-click and press space. Right-clicking and
+pressing space will also erase pencil marks.
+
 (All the actions described in \k{common-actions} are also available.)
 
 \H{solo-parameters} \I{parameters, for Solo}Solo parameters