private static void GenerateRowRules(int k)
{
//loop over all rows
for (int i = 0; i < 4; i++)
{
List <CNFify.Term> AllEqualities = new List <CNFify.Term>();
//loop over the number of columns
for (int j = 0; j < 3; j++)
{
var thisSquare = board[i, j, k];
var neighbourSquare = board[i, j + 1, k];
//these two should not be equal,
//the not is added at the upper level, here
//we just spec the equality
var Equal = CNFify.equal(thisSquare, neighbourSquare);
AllEqualities.Add(Equal);
}
AllPropositions.Add(NotAllEqual(AllEqualities));
}
}