// Called from Puzzle constructor
internal Cell(Puzzle owner, CellSet row, CellSet column, CellSet box)
{
Owner = owner;
Row = row;
Column = column;
Box = box;
}
public Puzzle()
{
rows = new CellSet[9];
columns = new CellSet[9];
boxes = new CellSet[9];
for (int i = 0; i < 9; i++)
{
rows[i] = new CellSet(this, CellSetType.Row, i);
columns[i] = new CellSet(this, CellSetType.Column, i);
boxes[i] = new CellSet(this, CellSetType.Box, i);
}
for (int ri = 0; ri < 9; ri++)
{
var row = rows[ri];
for (int ci = 0; ci < 9; ci++)
{
var column = columns[ci];
var box = boxes[3 * (ri / 3) + ci / 3];
var cell = new Cell(this, row, column, box);
row.Add(cell);
column.Add(cell);
box.Add(cell);
}
}
}
