Saunders, R
The Australasian Chess Review, 1930
#3
3 + 1
| 4349 | Kleinste Schachaufgaben Drei- und Viersteiner | 1970 |
| 3713 | Snap | 2002 |
| 14986 | White-Hume Collection | 2018 |
This anticipates 27943(1930), 177642(1987)
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