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Event table notes
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| Event data |
| Place: Berlin |
| Start date: 4 June 1921 |
| End date: 10 June 1921 |
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| References |
| Books |
| Di Felice, Chess Results, 1921-1930, page 23 |
| Feenstra Kuiper, 100 Jahre Schachzweikämpfe, page 46 |
| McGowan, Kurt Richter, page 12 |
| Skinner and Verhoeven, Alexander Alekhine's Chess Games, page 136, 768 |
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