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Oslo Chess

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Every change to the directory, or to the rules it follows, is noted here with its date, newest first.

Data means cards were added or revised; correction means a reader's message led to a change; wording means the site's text was edited; method means the way cards are made has changed.

DateChange
LaunchOslo Chess opens with 83 cards, 83 of them active or waiting for a newer trace; every source behind them was opened on 15 October 2026.