Search Chess Openings
Search by any name (You can also search by exact chess notation or MICOS code). Use Defence with “c”.
Searching for part of a name (e.g. Ware) may also return results like Stoneware in an Opening. The search find the longest opening from MICOS DB with all 3,815 openings.
Optimize Your Game:
Copy & paste a full MICOS opening (Example format: A00.144.IO – Van Geet Opening: Caro-Kann Defence: 1.Nc3 d5 2.e4 c6) into Paste MICOS Opening below to analyze, play and build your opening repertoire.

MICOS™ is the proprietary chess classification system developed by MasterInChess and protected by international copyright law.
You are welcome to use and share MICOS for personal, educational and non-commercial purposes. Commercial use or integration requires permission from MasterInChess.