Initialises the puzzle and solution set at [0,0] @return Sorted list of solution strings.
()
| 150 | */ |
| 151 | |
| 152 | private SortedSet<String> solve() |
| 153 | { solve(0x0002004008010020L,0,0); |
| 154 | |
| 155 | return solutions; |
| 156 | } |
| 157 | |
| 158 | /** Recursively solves the puzzle by fitting pieces into the |
| 159 | * next available hexagon. |