ChessUrge UCI engine (Windows x64)
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1. Put ChessUrgeEngine.exe and engine.json in the same folder.
2. Create an API key at https://chessurge.org/settings -> API keys.
3. Edit engine.json and replace apiKey with your key.
4. ChessBase: Engine -> Create UCI Engine -> select ChessUrgeEngine.exe.
   Put engine.json next to the exe; the APIKey UCI option is also supported.
   Other GUIs: Arena, CuteChess, BanksiaGUI, Nibbler.
5. Analyse. The engine prints "ChessUrge credits: 12.34" in the engine info
   panel every second while it searches.
6. Infinite analysis: choose Infinite in your GUI (or send "go infinite").
   Lines stream continuously and stop only when you press stop. Credits are
   reserved up to the admin-set infinite cap and unused nodes are refunded.

Cost: 200 million Stockfish nodes per credit. A 10 MN search costs 0.05 credits.
The engine talks to https://chessurge.org/api/engine/analyse and never bundles
its own Stockfish copy.

If Windows Defender flags this unsigned build, use ChessUrgeEngine-python.zip or
build from ChessUrgeEngine-source.zip. A CA-issued code-signing certificate is
the only permanent way to remove SmartScreen warnings.
