var s = new VariableInteger("s", 0, 9);
var e = new VariableInteger("e", 0, 9);
var n = new VariableInteger("n", 0, 9);
var d = new VariableInteger("d", 0, 9);
var m = new VariableInteger("m", 1, 9);
var o = new VariableInteger("o", 0, 9);
var r = new VariableInteger("r", 0, 9);
var y = new VariableInteger("y", 0, 9);
var c0 = new VariableInteger("c0", 0, 1);
var c1 = new VariableInteger("c1", 0, 1);
var c2 = new VariableInteger("c2", 0, 1);
var c3 = new VariableInteger("c3", 0, 1);

var constraints = new List<IConstraint>
{
    new AllDifferentInteger(new [] { s, e, n, d, m, o, r, y }),
    new ConstraintInteger(d + e == (10 * c0) + y),
    new ConstraintInteger(n + r + c0 == (10 * c1) + e),
    new ConstraintInteger(e + o + c1 == (10 * c2) + n),
    new ConstraintInteger(s + m + c2 == (10 * c3) + o),
    new ConstraintInteger(c3 == m)
};

var variables = new [] { c0, c1, c2, c3, s, e, n, d, m, o, r, y };
IState<int> state = new StateInteger(variables, constraints);

StateOperationResult searchResult;
state.StartSearch(out searchResult);

if (searchResult == StateOperationResult.Solved)
{
    Console.WriteLine("    {0} {1} {2} {3} ", s, e, n, d);
    Console.WriteLine("  + {0} {1} {2} {3} ", m, o, r, e);
    Console.WriteLine("  ---------");
    Console.WriteLine("  {0} {1} {2} {3} {4} \n", m, o, n, e, y);
}

Console.WriteLine("Runtime:\t{0}", state.Runtime);
Console.WriteLine("Backtracks:\t{1}", state.Backtracks);

StateOperationResult searchResult;
IList<IDictionary<string, IVariable<int>>> solutions;
state.StartSearch(out searchResult, out solutions);

foreach (var solution in solutions)
{
    for (var i = 0; i < variables.Length; ++i)
    {
        for (var j = 0; j < variables.Length; ++j)
            Console.Write(solution[i.ToString()].InstantiatedValue == j ? "Q" : ".");
        
        Console.WriteLine();
    }
    Console.WriteLine();
}

new ConstraintInteger(optimise == a + b + c + d + e + f + g + h)

var timeout = 60 * 5;
StateOperationResult searchResult;
var solution = default(IDictionary<string, IVariable<int>>);
    
state.StartSearch(out searchResult, optimise, out solution, timeout);

var a = new VariableInteger("a", 0, 9);
var array = new ConstrainedArray(new int[] { 0, 23, 52, 62, 75, 73, 47, 20, 87, 27 });
    
var constraint = new ConstraintInteger(array[a] < 40)