Index - O
| occupation | Solve.NoughtsCrosses |
| occupied | |
| 1 (Function) | Solve.NoughtsCrosses |
| 2 (Function) | Solve.FoxHounds |
| occupy | Solve.NoughtsCrosses |
| occupying | Solve.NoughtsCrosses |
| onBoard | Solve.FoxHounds |
| opposite | Solve.FoxHounds |
| orelseStrategy | Solve.Strategy |