protected Sudoku.Core.GrilleSudoku SolveOriginalCleanup(Sudoku.Core.GrilleSudoku instance)
{
BoolExpr instance_c = GetPuzzleConstraint(instance);
var z3Solver = GetSolver();
z3Solver.Assert(GenericContraints);
z3Solver.Assert(instance_c);
if (z3Solver.Check() == Status.SATISFIABLE)
{
Model m = z3Solver.Model;
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
if (instance.GetCellule(i, j) == 0)
{
instance.SetCell(i, j, ((IntNum)m.Evaluate(X[i][j])).Int);
}
}
}
}
else
{
Console.WriteLine("Failed to solve sudoku");
}
return(instance);
}
protected Sudoku.Core.GrilleSudoku SolveWithScope(Sudoku.Core.GrilleSudoku instance)
{
var z3Solver = GetReusableSolver();
z3Solver.Push();
BoolExpr instance_c = GetPuzzleConstraint(instance);
z3Solver.Assert(instance_c);
if (z3Solver.Check() == Status.SATISFIABLE)
{
Model m = z3Solver.Model;
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
if (instance.GetCellule(i, j) == 0)
{
instance.SetCell(i, j, ((IntNum)m.Evaluate(X[i][j])).Int);
}
}
}
}
else
{
Console.WriteLine("Failed to solve sudoku");
}
z3Solver.Pop();
return(instance);
}
protected Sudoku.Core.GrilleSudoku SolveWithSubstitutions(Sudoku.Core.GrilleSudoku instance)
{
var substExprs = new List <Expr>();
var substVals = new List <Expr>();
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
if (instance.GetCellule(i, j) != 0)
{
substExprs.Add(X[i][j]);
substVals.Add(z3Context.MkInt(instance.GetCellule(i, j)));
}
}
}
BoolExpr instance_c = (BoolExpr)GenericContraints.Substitute(substExprs.ToArray(), substVals.ToArray());
var z3Solver = GetSolver();
z3Solver.Assert(instance_c);
if (z3Solver.Check() == Status.SATISFIABLE)
{
Model m = z3Solver.Model;
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
if (instance.GetCellule(i, j) == 0)
{
instance.SetCell(i, j, ((IntNum)m.Evaluate(X[i][j])).Int);
}
}
}
}
else
{
Console.WriteLine("Failed to solve sudoku");
}
return(instance);
}
protected Sudoku.Core.GrilleSudoku SolveOriginalVersion(Sudoku.Core.GrilleSudoku instance)
{
BoolExpr instance_c = z3Context.MkTrue();
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
instance_c = z3Context.MkAnd(instance_c,
(BoolExpr)
z3Context.MkITE(z3Context.MkEq(z3Context.MkInt(instance.GetCellule(i, j)), z3Context.MkInt(0)),
z3Context.MkTrue(),
z3Context.MkEq(X[i][j], z3Context.MkInt(instance.GetCellule(i, j)))));
}
}
Solver s = z3Context.MkSolver();
s.Assert(GenericContraints);
s.Assert(instance_c);
if (s.Check() == Status.SATISFIABLE)
{
Model m = s.Model;
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
instance.SetCell(i, j, ((IntNum)m.Evaluate(X[i][j])).Int);
}
}
return(instance);
}
else
{
Console.WriteLine("Failed to solve sudoku");
return(instance);
}
}
public void Solve(Sudoku.Core.GrilleSudoku s)
{
var sRows = new List <string>();
var cols = Enumerable.Range(0, 9);
for (int i = 0; i < 9; i++)
{
sRows.Add(string.Concat(cols.Select(c => s.GetCellule(i, c))
.Select(val => val == 0 ? " " : val.ToString())));
}
//var grid = new Grid(ImmutableList.Create(
// "6 4 9 7 3",
// " 3 6 ",
// " 18",
// " 18 9",
// " 43 ",
// "7 39 ",
// " 7 ",
// " 4 8 ",
// "9 8 6 4 5"));
var grid = new Grid(ImmutableList.Create(sRows.ToArray()));
var internalRows = BuildInternalRowsForGrid(grid);
var dlxRows = BuildDlxRows(internalRows);
var solutions = new Dlx()
.Solve(dlxRows, d => d, r => r)
.Where(solution => VerifySolution(internalRows, solution))
.ToImmutableList();
var grille = SolutionToGrid(internalRows, solutions[0]);
for (int rowIndex = 0; rowIndex < 9; rowIndex++)
{
for (int coIndex = 0; coIndex < 9; coIndex++)
{
s.SetCell(rowIndex, coIndex, grille.ValueAt(rowIndex, coIndex));
}
}
}