 |
451. John James O’Keefe Die Schwalbe 1933 |
| Mate in 3 |
See the solution.
 |
452. Barry J. da Costa Andrade Chess World 1949 |
|
Mate in 2 Twin (b) After key of (a) |
See the solution.
 |
453. Herbert Ahues The Sun-Herald 1961 3rd Prize |
| Mate in 2 |
See the solution.
 |
454. Laimons Mangalis Die Schwalbe 1953 |
| Mate in 6 |
See the solution.
 |
455. Alexander Goldstein British Chess Federation Tourney 1955 4th Prize |
| Selfmate in 2 |
See the solution.