Select the problem required from the table below.
| DATE | STIPULATION | SOURCE |
|---|---|---|
| 2015-03-09 | #2 | The Observer |
| 2016-02-22 | #3 | Sunday Times |
| 2016-03-07 | #3 | Western Morning News |
| 2016-06-06 | #3 | The Problemist |
| 2018-03-19 | #4 | The Problemist |
| 2025-03-31 | #14 | Chess |
| 2025-06-02 | S#4 | The Problemist |