X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/40fde8844773ab30eb92842ffd47eca28f9f3423..e3f21163e0737b17412f5bd8c184b26715c396fa:/puzzles.but?ds=sidebyside

diff --git a/puzzles.but b/puzzles.but
index fa7ce1a..eefbcac 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
@@ -669,8 +686,9 @@ a time.
 As in Sixteen, \I{controls, for Netslide}control is with the mouse.
 See \k{sixteen-controls}.
 
-\I{parameters, for Netslide}Game parameters are the same as for Net
-(see \k{net-params}).
+\I{parameters, for Netslide}The available game parameters have similar
+meanings to those in Net (see \k{net-params}) and Sixteen (see
+\k{sixteen-params}).
 
 
 \C{pattern} \i{Pattern}
@@ -758,6 +776,23 @@ 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