will update to indicate the next direction on the path. You can also
press Space to automatically move in the direction of the hint
arrow. If you move in a different direction from the one shown by
-the arrow, the hint arrows will stop appearing because you have
-strayed from the provided path; you can then use \q{Solve} again to
-generate a new path if you want to.
+the arrow, arrows will be shown only if the puzzle is still solvable.
All the actions described in \k{common-actions} are also available.
In particular, if you do run into a mine and die, you can use the
appropriate way; typing in a 0 or using the space bar will clear a
filled square.
+Left-clicking a clue will mark it as done (grey it out), or unmark it
+if it is already marked. Holding Control or Shift and pressing an
+arrow key likewise marks any clue adjacent to the cursor in the given
+direction.
+
(All the actions described in \k{common-actions} are also available.)
\H{unequal-parameters} \I{parameters, for Unequal}Unequal parameters
still be unique. The remaining levels require increasingly complex
reasoning to avoid having to backtrack.
+\dt \e{Multiplication only}
+
+\dd If this is enabled, all boxes will be multiplication boxes.
+With this rule, the puzzle is known as \q{Inshi No Heya}.
\C{towers} \i{Towers}
that does not have a main digit in it.
Left-clicking a clue will mark it as done (grey it out), or unmark it
-if it is already marked.
+if it is already marked. Holding Control or Shift and pressing an
+arrow key likewise marks any clue in the given direction.
(All the actions described in \k{common-actions} are also available.)
turns, you might mark the one way it \e{can't} go with a cross.)
Alternatively, use the cursor keys to move the cursor. Use the Enter
-key to begin and end keyboard `drag' operations. Use the Space key to
-cancel the drag. Or, hold Control while dragging with the cursor keys
-to toggle segments as you move between squares.
+key to begin and end keyboard `drag' operations. Use the Space,
+Escape or Backspace keys to cancel the drag. Or, hold Control while
+dragging with the cursor keys to toggle segments as you move between
+squares.
Pressing Control-Shift-arrowkey or Shift-arrowkey simulates a left or
right click, respectively, on the edge in the direction of the key.