New puzzle from James Harvey: 'Tracks'.

.gitignore

@@ -56,6 +56,7 @@
 /solosolver
 /tents
 /tentssolver
+/tracks
 /towers
 /towerssolver
 /twiddle

html/tracks.html

@@ -0,0 +1,19 @@
+Tracks
+<p>
+Complete the track from A to B so that the rows and
+columns contain the same number of track segments as are indicated in the
+clues to the top and right of the grid. There are only straight and
+90-degree curved rail sections, and the track may not cross itself.
+<p>
+Left-click on an edge between two squares to add a track segment between
+the two squares. Right-click on an edge to add a cross on the edge,
+indicating no track is possible there.
+<p>
+Left-click in a square to add a colour indicator showing that you know the
+square must contain a track, even if you don't know which edges it crosses
+yet. Right-click in a square to add a cross indicating it contains no
+track segment.
+<p>
+Left- or right-drag between squares to lay a straight line of is-track or
+is-not-track indicators, useful for filling in rows or columns to match the
+clue.

icons/Makefile

@@ -4,7 +4,7 @@ PUZZLES = blackbox bridges cube dominosa fifteen filling flip flood	\
 	  galaxies guess inertia keen lightup loopy magnets map mines	\
 	  net netslide pattern pearl pegs range rect samegame		\
 	  signpost singles sixteen slant solo tents towers twiddle	\
-	  undead unequal unruly untangle
+	  tracks undead unequal unruly untangle
 
 BASE = $(patsubst %,%-base.png,$(PUZZLES))
 WEB = $(patsubst %,%-web.png,$(PUZZLES))
@@ -81,6 +81,7 @@ slant-ibase.png : override CROP=321x321 160x160+160+160
 solo-ibase.png : override CROP=481x481 145x145+24+24
 tents-ibase.png : override CROP=320x320 165x165+142+0
 towers-ibase.png : override CROP=300x300 102x102+151+6
+tracks-ibase.png : override CROP=246x246 118x118+6+6
 twiddle-ibase.png : override CROP=192x192 102x102+69+21
 undead-ibase.png : override CROP=416x480 192x192+16+80
 unequal-ibase.png : override CROP=208x208 104x104+104+104

icons/tracks.sav

@@ -0,0 +1,31 @@
+SAVEFILE:41:Simon Tatham's Portable Puzzle Collection
+VERSION :1:1
+GAME    :12:Train Tracks
+PARAMS  :5:6x6dt
+CPARAMS :5:6x6dt
+SEED    :15:145870397370785
+DESC    :31:l6t9b,3,2,1,S4,5,4,2,6,S3,2,3,3
+NSTATES :2:23
+STATEPOS:2:20
+MOVE    :5:TD0,0
+MOVE    :5:TR0,0
+MOVE    :5:TL5,5
+MOVE    :5:TU5,5
+MOVE    :29:TS1,1;TS2,1;TS3,1;TS4,1;TS5,1
+MOVE    :29:NS2,0;NS2,2;NS2,3;NS2,4;NS2,5
+MOVE    :5:TU1,1
+MOVE    :17:NS0,3;NS0,4;NS0,5
+MOVE    :23:NS1,2;NS1,3;NS1,4;NS1,5
+MOVE    :5:TL2,1
+MOVE    :5:TL3,1
+MOVE    :5:TS4,4
+MOVE    :5:TS3,4
+MOVE    :17:NS3,0;NS4,0;NS5,0
+MOVE    :5:TS4,2
+MOVE    :5:TS4,3
+MOVE    :5:TU3,4
+MOVE    :5:TL4,4
+MOVE    :5:TL5,1
+MOVE    :5:TU5,2
+MOVE    :5:NS5,3
+MOVE    :5:NS3,2

puzzles.but

@@ -3183,6 +3183,62 @@ real challenge, set this value to 0 and then try to solve a grid in
 
 }
 
+\C{tracks} \i{Tracks}
+
+\cfg{winhelp-topic}{games.tracks}
+
+You are given a grid of squares, some of which are filled with train
+tracks. You need to complete the track from A to B so that the rows and
+columns contain the same number of track segments as are indicated in the
+clues to the top and right of the grid.
+
+There are only straight and 90 degree curved rails, and the track may not
+cross itself.
+
+Tracks was contributed to this collection by James Harvey.
+
+\H{tracks-controls} \I{controls, for Tracks}Tracks controls
+
+Left-clicking on an edge between two squares adds a track segment between
+the two squares. Right-clicking on an edge adds a cross on the edge,
+indicating no track is possible there.
+
+Left-clicking in a square adds a colour indicator showing that you know the
+square must contain a track, even if you don't know which edges it crosses
+yet. Right-clicking in a square adds a cross indicating it contains no
+track segment.
+
+Left- or right-dragging between squares allows you to lay a straight line
+of is-track or is-not-track indicators, useful for filling in rows or
+columns to match the clue.
+
+(All the actions described in \k{common-actions} are also available.)
+
+\H{tracks-parameters} \I{parameters, for Tracks}Tracks parameters
+
+These parameters are available from the \q{Custom...} option on the
+\q{Type} menu.
+
+\dt \e{Width}, \e{Height}
+
+\dd Size of the grid, in squares.
+
+\dt \e{Difficulty}
+
+\dd Controls the difficulty of the generated puzzle: at Tricky level,
+you are required to make more deductions regarding disregarding moves
+that would lead to impossible crossings later.
+
+\dt \e{Disallow consecutive 1 clues}
+
+\dd Controls whether the Tracks game generation permits two adjacent
+rows or columns to have a 1 clue, or permits the row or column of the
+track's endpoint to have a 1 clue. By default this is not permitted,
+to avoid long straight boring segments of track and make the games
+more twiddly and interesting. If you want to restore the possibility,
+turn this option off.
+
+
 \A{licence} \I{MIT licence}\ii{Licence}
 
 This software is \i{copyright} 2004-2014 Simon Tatham.

tracks.R

@@ -0,0 +1,21 @@
+# -*- makefile -*-
+
+TRACKS_EXTRA = dsf
+
+tracks  : [X] GTK COMMON tracks TRACKS_EXTRA tracks-icon|no-icon
+
+tracks  : [G] WINDOWS COMMON tracks TRACKS_EXTRA tracks.res|noicon.res
+
+ALL += tracks[COMBINED] TRACKS_EXTRA
+
+!begin gtk
+GAMES += tracks
+!end
+
+!begin >list.c
+    A(tracks) \
+!end
+
+!begin >gamedesc.txt
+tracks:tracks.exe:Tracks:Path-finding railway track puzzle:Fill in the railway track according to the clues.
+!end