}
-This puzzle appears in the Times under the name \q{KenKen}.
+This puzzle appears in the Times under the name \q{\i{KenKen}}.
\H{keen-controls} \i{Keen controls}
missing.
This puzzle appears on the web under various names, particularly
-\q{Skyscrapers}, but I don't know who first invented it.
+\q{\i{Skyscrapers}}, but I don't know who first invented it.
\H{towers-controls} \i{Towers controls}
\cfg{winhelp-topic}{games.singles}
-You have a grid of squares, all of which contain numbers. Your task
+You have a grid of white squares, all of which contain numbers. Your task
is to colour some of the squares black (removing the number) so as to satisfy
all of the following conditions:
\b No number occurs more than once in any row or column.
-\b No black square is horizontally adjacent to any other black square.
+\b No black square is horizontally or vertically adjacent to any other black
+square.
-\b The remaining white squares must all form one contiguous region.
+\b The remaining white squares must all form one contiguous region
+(connected by edges, not just touching at corners).
-Credit for this puzzle goes to \i{Nikoli} \k{nikoli-singles} who call it Hitori.
+Credit for this puzzle goes to \i{Nikoli} \k{nikoli-hitori} who call it
+\i{Hitori}.
Singles was contributed to this collection by James Harvey.
\dd Controls the difficulty of the generated puzzle.
+\C{magnets} \i{Magnets}
+
+\cfg{winhelp-topic}{games.magnets}
+
+A rectangular grid has been filled with a mixture of magnets (that is,
+dominoes with one positive end and one negative end) and blank dominoes
+(that is, dominoes with two neutral poles).
+These dominoes are initially only seen in silhouette. Around the grid
+are placed a number of clues indicating the number of positive and
+negative poles contained in certain columns and rows.
+
+Your aim is to correctly place the magnets and blank dominoes such that
+all the clues are satisfied, with the additional constraint that no two
+similar magnetic poles may be orthogonally adjacent (since they repel).
+Neutral poles do not repel, and can be adjacent to any other pole.
+
+Credit for this puzzle goes to \i{Janko} \k{janko-magnets}.
+
+Magnets was contributed to this collection by James Harvey.
+
+\B{janko-magnets}
+\W{http://www.janko.at/Raetsel/Magnete/index.htm}\cw{http://www.janko.at/Raetsel/Magnete/index.htm}
+
+\H{magnets-controls} \i{Magnets controls}
+
+\IM{Magnets controls} controls, for Magnets
+
+Left-clicking on an empty square places a magnet at that position with
+the positive pole on the square and the negative pole on the other half
+of the magnet; left-clicking again reverses the polarity, and a third
+click removes the magnet.
+
+Right-clicking on an empty square places a blank domino there.
+Right-clicking again places two question marks on the domino, signifying
+\q{this cannot be blank} (which can be useful to note deductions while
+solving), and right-clicking again empties the domino.
+
+You can also use the cursor keys to move a cursor around the grid.
+Pressing the return key will lay a domino with a positive pole at that
+position; pressing again reverses the polarity and then removes the
+domino, as with left-clicking. Using the space bar allows placement
+of blank dominoes and cannot-be-blank hints, as for right-clicking.
+
+(All the actions described in \k{common-actions} are also available.)
+
+\H{magnets-parameters} \I{parameters, for Magnets}Magnets parameters
+
+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. There will be half \e{Width} \by \e{Height}
+dominoes in the grid: if this number is odd then one square will be blank.
+
+(Grids with at least one odd dimension tend to be easier to solve.)
+
+\dt \e{Difficulty}
+
+\dd Controls the difficulty of the generated puzzle. At Tricky level,
+you are required to make more deductions about empty dominoes and
+row/column counts.
+
+\dt \e{Strip clues}
+
+\dd If true, some of the clues around the grid are removed at generation
+time, making the puzzle more difficult.
+
+
+
\A{licence} \I{MIT licence}\ii{Licence}
This software is \i{copyright} 2004-2010 Simon Tatham.
~mdw / sgt / puzzles / blobdiff