Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)
1st Prize, Deutsche Schachzeitung, 1909
#2
7 + 3
15 | British Chess Magazine | 1911 |
1829 | The Theory of Pawn Promotion | 1912 |
3310 | 2345 Chess Problems | 1997 |
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