In order to solve a puzzle, one needs to determine, which cells are going
to be filled boxes and which are going to be empty. Determining, which
cells are to be empty (called spaces), is as important as determining
which are to be filled (called boxes). Later in the solving process,
the spaces help to determine where a clue (continuing block of boxes
and a number in the legend) may spread.|
It is also important never to guess. Only cells that can be determined
by logic should be filled. If guessing, a single error can spread over
the entire field soon and completely ruin the solution. It usually comes
to the surface only after a while, when it is very difficult to correct
the puzzle. Only advanced and experienced solvers are usually able to
fix it completely and finish such ruined puzzle.
The hidden picture plays no part in the solving process. Even if it is
obvious from the picture that a cell will be a box, it is usually
treacherous to rely on it. The picture, however, may may help find and
eliminate an error.
The game Picross - paint by numbers - is also known with many other
Crucipixel, Edel, FigurePic, Grafilogika, Griddlers, Hanjie,
Illust-Logic, Japanese Crosswords, Japanese Puzzels, Kare Karala!,
Logic Art, Logic Square, Logicolor, Logik-Puzzles, Logimage, Nonograms,
Zakókodované obrázky, Malované krízovky, Oekaki Logic, Oekaki-Mate,
Paint Logic, Pic-a-Pix, Picture crossword, Pixel Puzzles, Shchor Uftor and Tsunami.
It has also been called Paint by Sudoku, although this name is