/// <summary>
/// Assign a single value to the tile, propagate the changes via calls to Eliminate
/// NOTE: Method mutates the CPBoard cpb parameter
/// </summary>
/// <param name="cpb"></param>
/// <param name="tileIndex"></param>
/// <param name="value"></param>
/// <returns></returns>
static public bool Assign(CPBoard cpb, int tileIndex, string value)
{
CDebug.Assert(value.Length == 1, "Cannot assign multiple values");
var values = cpb.Get(tileIndex);
// Cannot assign a value that is a not possible value of the tile
if (!values.Contains(value))
{
return(false);
}
// Attempt to eliminate values from peers
cpb.Set(tileIndex, value);
foreach (var peer in Peers[tileIndex])
{
if (!Eliminate(cpb, peer, value))
{
return(false);
}
}
return(true);
}
