Changes

* Hard to integrate with chess engines. [[Ronald de Man]] has not provided probing code as an independent library. Instead, he provided it as a part of [[Stockfish]] chess engines. The code has integrated too deeply with that chess engine codeand it requires a lot of effort to de-integrate. All make the reuse of the code for other chess engines become hard jobs* Hard to understand and contribute to the project. ETGB itself is a hard topic. Syzygy EGTB has also integrated with many advance techniques/tricks. It is written in old-style C language. All make it become very hard to understand and/or modify to improve or for other purposes* [[DTZ50]] metric may lead the engines to win in significantly much longer ways, compared with [[DTM]] one