thumb|Anadyrsk was on the east–west part of the Anadyr River at the point where it swings north
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thumb|Anadyrsk was on the east–west part of the Anadyr River at the point where it swings north
Anadyrsk was an important Russian ostrog (fortified settlement) in far northeastern Siberia from 1649 to 1764. It was on the Anadyr River, near the head of small-boat navigation, about 300 miles upstream, 12 miles northeast of the present Markovo.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).