public void CopyWithNewReferences_WithoutIMissingBoxValuesTracker_Throws()
{
var puzzle = new Puzzle(new int?[, ] {
{ null /* 1 */, null /* 4 */, 3, 2 },
{ null /* 2 */, null /* 3 */, null /* 1 */, 4 },
{ null /* 4 */, null /* 1 */, 2, 3 },
{ 3, null /* 2 */, 4, 1 }
});
var possibleValues = new PossibleValues(puzzle);
var boxRule = new BoxUniquenessRule(puzzle, possibleValues.AllPossible, false);
var ruleKeeper = new DynamicRuleKeeper(puzzle, possibleValues, new List <ISudokuRule> {
boxRule
});
var heuristic = new UniqueInBoxHeuristic(
puzzle, possibleValues, boxRule);
var puzzleCopy = new Puzzle(puzzle);
var possibleValuesCopy = new PossibleValues(possibleValues);
var ruleKeeperWithoutBoxTracker = new DynamicRuleKeeper(puzzleCopy, possibleValuesCopy,
new List <ISudokuRule> {
new ColumnUniquenessRule(puzzleCopy, possibleValues.AllPossible),
});
Assert.Throws <ArgumentException>(() => heuristic.CopyWithNewReferences(
puzzleCopy, possibleValuesCopy, ruleKeeperWithoutBoxTracker.GetRules()));
}
public void Revert_RevertsSpecifiedBox()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null /* 4 */, null /* 3 */, 2 },
new int?[] { null /* 2 */, 3, null /* 1 */, null /* 4 */ },
new int?[] { null /* 4 */, null /* 1 */, 2, 3 },
new int?[] { null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
IList <BitVector> initialPossibleValuesByBox = _GetPossibleValuesByBox(puzzle.Size, rule);
var updatedCoordTracker = new CoordinateTracker(puzzle.Size);
var coord = new Coordinate(1, 2);
int val = 1;
rule.Update(in coord, val, updatedCoordTracker);
var revertedCoordTracker = new CoordinateTracker(puzzle.Size);
rule.Revert(coord, val, revertedCoordTracker);
Assert.Equal(
updatedCoordTracker.TrackedCoords.ToArray(),
revertedCoordTracker.TrackedCoords.ToArray());
for (int box = 0; box < initialPossibleValuesByBox.Count; box++)
{
Assert.Equal(
initialPossibleValuesByBox[box],
rule.GetMissingValuesForBox(box));
}
}
public void Update_SkippingRowsAndCols_AppendsOnlyOthersInBox()
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, null /* 4 */, null /* 3 */, 2 },
{ null /* 2 */, 3, null /* 1 */, null /* 4 */ },
{ null /* 4 */, null /* 1 */, 2, 3 },
{ null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size), true);
var coordTracker = new CoordinateTracker(puzzle.Size);
var coord = new Coordinate(1, 3);
int val = 4;
rule.Update(coord, val, coordTracker);
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(0, 2)
},
new HashSet <Coordinate>(coordTracker.GetTrackedCoords().ToArray()));
Assert.Equal(new BitVector(0b10100), rule.GetPossibleValues(new Coordinate(0, 0)));
Assert.Equal(new BitVector(0b01010), rule.GetPossibleValues(new Coordinate(0, 2)));
Assert.Equal(new BitVector(0b01010), rule.GetPossibleValues(new Coordinate(1, 2)));
Assert.Equal(new BitVector(0b11110), rule.GetPossibleValues(new Coordinate(2, 0)));
Assert.Equal(new BitVector(0b00000), rule.GetPossibleValues(new Coordinate(2, 2)));
}
public void Revert_SkippingRowsAndCols_AppendsOnlyOthersInBox()
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, 4, null /* 3 */, 2 },
{ null /* 2 */, null /* 3 */, null /* 1 */, null /* 4 */ },
{ null /* 4 */, null /* 1 */, 2, 3 },
{ null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size), true);
IList <BitVector> initialPossibleValuesByBox = _GetPossibleValuesByBox(puzzle.Size, rule);
var coord = new Coordinate(1, 3);
int val = 4;
rule.Update(in coord, val, new CoordinateTracker(puzzle.Size));
var revertedCoordTracker = new CoordinateTracker(puzzle.Size);
rule.Revert(coord, val, revertedCoordTracker);
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(0, 2)
},
new HashSet <Coordinate>(revertedCoordTracker.GetTrackedCoords().ToArray()));
for (int box = 0; box < initialPossibleValuesByBox.Count; box++)
{
Assert.Equal(
initialPossibleValuesByBox[box],
rule.GetMissingValuesForBox(box));
}
}
public void Update_UpdatesSpecifiedBox()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null /* 4 */, null /* 3 */, 2 },
new int?[] { null /* 2 */, 3, null /* 1 */, null /* 4 */ },
new int?[] { null /* 4 */, null /* 1 */, 2, 3 },
new int?[] { null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
var coordTracker = new CoordinateTracker(puzzle.Size);
var coord = new Coordinate(1, 2);
int val = 1;
rule.Update(coord, val, coordTracker);
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(0, 2), new Coordinate(1, 3)
},
new HashSet <Coordinate>(coordTracker.TrackedCoords.ToArray()));
Assert.Equal(new BitVector(0b10100), rule.GetPossibleValues(new Coordinate(0, 0)));
Assert.Equal(new BitVector(0b11000), rule.GetPossibleValues(new Coordinate(0, 2)));
Assert.Equal(new BitVector(0b11110), rule.GetPossibleValues(new Coordinate(2, 0)));
Assert.Equal(new BitVector(0b00000), rule.GetPossibleValues(new Coordinate(2, 2)));
}
public void TrySolve_MegaPuzzle_Solves()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { null, null, null, null, 10, 1, null, 8, null, 15, 3, 11, null, 2, 16, null },
new int?[] { 14, null, 2, null, null, 4, 3, null, null, 13, 8, null, null, 12, null, null },
new int?[] { null, null, null, 12, null, null, null, 15, null, null, null, 7, null, null, 9, 10 },
new int?[] { 1, 10, 15, null, 6, null, null, null, null, 14, null, null, null, null, null, 11 },
new int?[] { null, 11, 14, 6, null, null, null, 9, 13, 8, null, null, null, null, 2, 3 },
new int?[] { 12, null, null, null, 4, null, 7, 3, 11, 6, null, null, 16, null, 5, null },
new int?[] { 13, 16, null, 2, null, null, null, 1, null, null, 5, null, 10, 9, null, null },
new int?[] { null, 4, null, null, 13, null, 2, null, null, null, 16, 3, 11, null, null, null },
new int?[] { null, null, null, 10, 3, 6, null, null, null, 9, null, 12, null, null, 4, null },
new int?[] { null, null, 12, 15, null, 9, null, null, 7, null, null, null, 1, null, 3, 14 },
new int?[] { null, 1, null, 4, null, null, 5, 12, 3, 10, null, 8, null, null, null, 2 },
new int?[] { 3, 6, null, null, null, null, 15, 10, 4, null, null, null, 12, 5, 7, null },
new int?[] { 2, null, null, null, null, null, 4, null, null, null, null, 15, null, 16, 11, 9 },
new int?[] { 4, 14, null, null, 16, null, null, null, 2, null, null, null, 6, null, null, null },
new int?[] { null, null, 16, null, null, 7, 8, null, null, 4, 10, null, null, 14, null, 5 },
new int?[] { null, 3, 6, null, 9, 12, 14, null, 8, null, 13, 16, null, null, null, null }
});
var rowRule = new RowUniquenessRule();
var columnRule = new ColumnUniquenessRule();
var boxRule = new BoxUniquenessRule();
var diagonalRule = new DiagonalUniquenessRule();
var ruleKeeper = new DynamicRuleKeeper(
new IRule[] { rowRule, columnRule, boxRule, diagonalRule });
var heuristic = new StandardHeuristic(
rowRule, columnRule, boxRule);
var solver = new PuzzleSolver <PuzzleWithPossibleValues>(ruleKeeper, heuristic);
Assert.True(solver.TrySolve(puzzle));
_AssertMegaPuzzleSolved(puzzle);
}
public void Constructor_AcceptsValidPuzzleSizes(int size)
{
int?[,] matrix = new int?[size, size];
var puzzle = new Puzzle(matrix);
var rule = new BoxUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size), false);
Assert.NotNull(rule);
}
private IList <BitVector> _GetPossibleValuesByBox(int numBoxes, BoxUniquenessRule rule)
{
var possibleBoxValues = new List <BitVector>();
for (int box = 0; box < numBoxes; box++)
{
possibleBoxValues.Add(rule.GetMissingValuesForBox(box));
}
return(possibleBoxValues);
}
public void TryInit_WithDuplicateValueInBox_Fails()
{
var puzzle = new PuzzleWithPossibleValues(
new int?[][] {
new int?[] { 1, null /* 4 */, null /* 3 */, 2 },
new int?[] { null /* 2 */, /* INCORRECT */ 1, null /* 1 */, null /* 4 */ },
new int?[] { null /* 4 */, null /* 1 */, 2, 3 },
new int?[] { null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule();
Assert.False(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
}
public void Constructor_FiltersCorrectly()
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, null /* 4 */, null /* 3 */, 2 },
{ null /* 2 */, 3, null /* 1 */, null /* 4 */ },
{ null /* 4 */, null /* 1 */, 2, 3 },
{ null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size), false);
Assert.Equal(new BitVector(0b10100), rule.GetPossibleValues(new Coordinate(0, 0)));
Assert.Equal(new BitVector(0b11010), rule.GetPossibleValues(new Coordinate(0, 2)));
Assert.Equal(new BitVector(0b11110), rule.GetPossibleValues(new Coordinate(2, 0)));
Assert.Equal(new BitVector(0b00000), rule.GetPossibleValues(new Coordinate(2, 2)));
}
public bool SudokuSpiceDynamicMultiple(PuzzleSample puzzle)
{
var p = new PuzzleWithPossibleValues(puzzle.NullableJaggedMatrix);
var rowRule = new RowUniquenessRule();
var columnRule = new ColumnUniquenessRule();
var boxRule = new BoxUniquenessRule();
var ruleKeeper = new DynamicRuleKeeper(
new IRule[] { rowRule, columnRule, boxRule });
var heuristic = new StandardHeuristic(
rowRule, columnRule, boxRule);
var solver = new RuleBased.PuzzleSolver <PuzzleWithPossibleValues>(ruleKeeper, heuristic);
var result = solver.Solve(p, randomizeGuesses: true);
return(result.NumEmptySquares == 0);
}
public void TryInit_ValidPuzzle_FiltersCorrectly()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null /* 4 */, null /* 3 */, 2 },
new int?[] { null /* 2 */, 3, null /* 1 */, null /* 4 */ },
new int?[] { null /* 4 */, null /* 1 */, 2, 3 },
new int?[] { null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
Assert.Equal(new BitVector(0b10100), rule.GetPossibleValues(new Coordinate(0, 0)));
Assert.Equal(new BitVector(0b11010), rule.GetPossibleValues(new Coordinate(0, 2)));
Assert.Equal(new BitVector(0b11110), rule.GetPossibleValues(new Coordinate(2, 0)));
Assert.Equal(new BitVector(0b00000), rule.GetPossibleValues(new Coordinate(2, 2)));
}
public void Constructor_WithDuplicateValueInBox_Throws()
{
ArgumentException ex = Assert.Throws <ArgumentException>(() =>
{
var rule = new BoxUniquenessRule(
new Puzzle(
new int?[, ] {
{ 1, null /* 4 */, null /* 3 */, 2 },
{ null /* 2 */, /* INCORRECT */ 1, null /* 1 */, null /* 4 */ },
{ null /* 4 */, null /* 1 */, 2, 3 },
{ null /* 3 */, null /* 2 */, 4, 1 }
}),
BitVector.CreateWithSize(4),
false);
});
Assert.Contains("Puzzle has duplicate value in box", ex.Message);
}
public void Solve_ValidPuzzle_SolvesPuzzle(Puzzle puzzle)
{
var possibleValues = new PossibleValues(puzzle);
var rowRule = new RowUniquenessRule(puzzle, possibleValues.AllPossible);
var columnRule = new ColumnUniquenessRule(puzzle, possibleValues.AllPossible);
var boxRule = new BoxUniquenessRule(puzzle, possibleValues.AllPossible, true);
var ruleKeeper = new DynamicRuleKeeper(
puzzle, possibleValues,
new List <ISudokuRule> {
rowRule, columnRule, boxRule
});
var heuristic = new StandardHeuristic(
puzzle, possibleValues, rowRule, columnRule, boxRule);
var solver = new PuzzleSolver(puzzle, possibleValues, ruleKeeper, heuristic);
solver.Solve();
_AssertPuzzleSolved(puzzle);
}
public bool SudokuSpiceDynamicMultiple(PuzzleSample puzzle)
{
var p = new Puzzle(puzzle.NullableMatrix);
var possibleValues = new PossibleValues(p);
var rowRule = new RowUniquenessRule(p, possibleValues.AllPossible);
var columnRule = new ColumnUniquenessRule(p, possibleValues.AllPossible);
var boxRule = new BoxUniquenessRule(p, possibleValues.AllPossible, true);
var ruleKeeper = new DynamicRuleKeeper(
p, possibleValues,
new List <ISudokuRule> {
rowRule, columnRule, boxRule
});
var heuristic = new StandardHeuristic(
p, possibleValues, rowRule, columnRule, boxRule);
var solver = new PuzzleSolver(p, possibleValues, ruleKeeper, heuristic);
solver.SolveRandomly();
return(p.NumEmptySquares == 0);
}
public void CopyWithNewReference_CreatesDeepCopy()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null /* 4 */, null /* 3 */, 2 },
new int?[] { null /* 2 */, 3, null /* 1 */, null /* 4 */ },
new int?[] { null /* 4 */, null /* 1 */, 2, 3 },
new int?[] { null /* 3 */, null /* 2 */, 4, 1 }
});
var rule = new BoxUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
var puzzleCopy = new PuzzleWithPossibleValues(puzzle);
IRule ruleCopy = rule.CopyWithNewReference(puzzleCopy);
int val = 3;
var coord = new Coordinate(3, 0);
ruleCopy.Update(coord, val, new CoordinateTracker(puzzle.Size));
Assert.NotEqual(rule.GetPossibleValues(coord), ruleCopy.GetPossibleValues(coord));
puzzleCopy[coord] = val;
var secondCoord = new Coordinate(3, 1);
int secondVal = 2;
var coordTracker = new CoordinateTracker(puzzle.Size);
ruleCopy.Update(secondCoord, secondVal, coordTracker);
var originalCoordTracker = new CoordinateTracker(puzzle.Size);
rule.Update(secondCoord, secondVal, originalCoordTracker);
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(2, 0), new Coordinate(2, 1)
},
new HashSet <Coordinate>(coordTracker.TrackedCoords.ToArray()));
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(2, 0), new Coordinate(2, 1), new Coordinate(3, 0)
},
new HashSet <Coordinate>(originalCoordTracker.TrackedCoords.ToArray()));
}
public void GetPossibleValues_MatchesGetPossibleBoxValues()
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, null /* 4 */, null /* 3 */, 2 },
{ null /* 2 */, null /* 3 */, null /* 1 */, 4 },
{ null /* 4 */, 1, null /* 2 */, 3 },
{ 3, null /* 2 */, null /* 4 */, 1 }
});
var rule = new BoxUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size), false);
IList <BitVector> possibleValuesByBox = _GetPossibleValuesByBox(puzzle.Size, rule);
for (int row = 0; row < puzzle.Size; row++)
{
for (int column = 0; column < puzzle.Size; column++)
{
int box = puzzle.GetBoxIndex(row, column);
Assert.Equal(
possibleValuesByBox[box],
rule.GetPossibleValues(new Coordinate(row, column)));
}
}
}
public void Solve_MegaPuzzle_Solves()
{
var puzzle = new Puzzle(new int?[, ] {
{ null, null, null, null, 10, 1, null, 8, null, 15, 3, 11, null, 2, 16, null },
{ 14, null, 2, null, null, 4, 3, null, null, 13, 8, null, null, 12, null, null },
{ null, null, null, 12, null, null, null, 15, null, null, null, 7, null, null, 9, 10 },
{ 1, 10, 15, null, 6, null, null, null, null, 14, null, null, null, null, null, 11 },
{ null, 11, 14, 6, null, null, null, 9, 13, 8, null, null, null, null, 2, 3 },
{ 12, null, null, null, 4, null, 7, 3, 11, 6, null, null, 16, null, 5, null },
{ 13, 16, null, 2, null, null, null, 1, null, null, 5, null, 10, 9, null, null },
{ null, 4, null, null, 13, null, 2, null, null, null, 16, 3, 11, null, null, null },
{ null, null, null, 10, 3, 6, null, null, null, 9, null, 12, null, null, 4, null },
{ null, null, 12, 15, null, 9, null, null, 7, null, null, null, 1, null, 3, 14 },
{ null, 1, null, 4, null, null, 5, 12, 3, 10, null, 8, null, null, null, 2 },
{ 3, 6, null, null, null, null, 15, 10, 4, null, null, null, 12, 5, 7, null },
{ 2, null, null, null, null, null, 4, null, null, null, null, 15, null, 16, 11, 9 },
{ 4, 14, null, null, 16, null, null, null, 2, null, null, null, 6, null, null, null },
{ null, null, 16, null, null, 7, 8, null, null, 4, 10, null, null, 14, null, 5 },
{ null, 3, 6, null, 9, 12, 14, null, 8, null, 13, 16, null, null, null, null }
});
var possibleValues = new PossibleValues(puzzle);
var rowRule = new RowUniquenessRule(puzzle, possibleValues.AllPossible);
var columnRule = new ColumnUniquenessRule(puzzle, possibleValues.AllPossible);
var boxRule = new BoxUniquenessRule(puzzle, possibleValues.AllPossible, true);
var diagonalRule = new DiagonalUniquenessRule(puzzle, possibleValues.AllPossible);
var ruleKeeper = new DynamicRuleKeeper(
puzzle, possibleValues,
new List <ISudokuRule> {
rowRule, columnRule, boxRule, diagonalRule
});
var heuristic = new StandardHeuristic(
puzzle, possibleValues, rowRule, columnRule, boxRule);
var solver = new PuzzleSolver(puzzle, possibleValues, ruleKeeper, heuristic);
solver.Solve();
_AssertMegaPuzzleSolved(puzzle);
}
public void GetPossibleValues_MatchesGetPossibleBoxValues()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null /* 4 */, null /* 3 */, 2 },
new int?[] { null /* 2 */, null /* 3 */, null /* 1 */, 4 },
new int?[] { null /* 4 */, 1, null /* 2 */, 3 },
new int?[] { 3, null /* 2 */, null /* 4 */, 1 }
});
var rule = new BoxUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
IList <BitVector> possibleValuesByBox = _GetPossibleValuesByBox(puzzle.Size, rule);
for (int row = 0; row < puzzle.Size; row++)
{
for (int column = 0; column < puzzle.Size; column++)
{
int box = Boxes.CalculateBoxIndex(new(row, column), Boxes.IntSquareRoot(puzzle.Size));
Assert.Equal(
possibleValuesByBox[box],
rule.GetPossibleValues(new Coordinate(row, column)));
}
}
}
