private void InferFromNeighbouringLines(Board b)
{
for (int x = 0; x < 9; x++)
{
int?[] line = b.Row(x);
for (int y = 0; y < 9; y++)
{
// If a blank item is found ...
if (line[y] == null)
{
// ... start by figuring which threeBy it's in ...
}
}
}
for (int y = 0; y < 9; y++)
{
b.Column(y);
}
}
/// <summary>
/// Check each row and column -
/// if there's only the one unfilled cell,
/// it's easy to figure out what the value should be.
/// </summary>
private void OneOnALineCheck(Board b)
{
// [TODO] Should probably look at using a local method
NullCount nullCount = delegate(int?[] line)
{
int nullsOnLineCount = 0;
for (int x = 0; x < 9; x++)
{
if (line[x] == null)
{
nullsOnLineCount++;
}
}
return(nullsOnLineCount);
};
ReplaceSingleValue replaceSingleValue = delegate(int?[] line)
{
// ... figure out the missing value ...
// 45
int summedV = 0;
foreach (int?v in line)
{
summedV += v ?? 0;
}
// ... and insert it.
for (int i = 0; i < 9; i++)
{
if (line[i] == null)
{
line[i] = 45 - summedV;
break;
}
}
return(line);
};
// Check each row for how many nulls
for (int x = 0; x < 9; x++)
{
if (nullCount(b.Row(x)) == 1)
{
b.Row(x, replaceSingleValue(b.Row(x)));
}
}
// Check each column for how many nulls
for (int y = 0; y < 9; y++)
{
if (nullCount(b.Column(y)) == 1)
{
b.Column(y, replaceSingleValue(b.Column(y)));
}
}
// Check each threeBy for how many nulls
for (int x = 0; x < 3; x++)
{
for (int y = 0; y < 3; y++)
{
if (nullCount(b.ThreeBy(x, y)) == 1)
{
b.ThreeBy(x, y, replaceSingleValue(b.ThreeBy(x, y)));
}
}
}
// var row = b.Line(x);
//for (int y = 0; y < 9; y++)
//{
// if (row[y] == null)
// {
// nullsOnRowCount++;
// }
//}
//// If there's only the one empty cell ...
//if (nullsOnRowCount == 1)
//{
// // ... figure out the missing value ...
// // 45
// int summedV = 0;
// foreach (int? v in row)
// summedV += v ?? 0;
// // ... and insert it.
// for(int i = 0; i < 9; i++)
// {
// if (row[i] == null)
// {
// row[i] = 45 - summedV;
// break;
// }
// }
//}
// }
// Check each column for how many nulls
for (int y = 0; y < 9; y++)
{
}
}
