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'''Felicity Tablebases''',<br/>
are open source endgame tablebases in C++ for chess, [[Chinese Chess|Xiangqi]] and [[Jeiqi]] developed by [[Pham Hong Nguyen|Nguyen Pham]], providing some popular metrics such as [[Endgame Tablebases#DTM|depth to mate]] and [[Endgame Tablebases#DTC|depth to convert]] information. First published in 2018, it supported only Xiangqi at that time and it used a special compression algorithm to create and run with a very small-size EGTB. In April 2024, Nguyen Pham restarted the project, rewrote the whole code, added the generator, and supported chess, Xiangqi and Jeiqi.
=Progress reports=
Felicity is a project for studying/researching but not a ready-use one. It is not fixed to specific things such as metrics, board presentations, algorithms for compressing, or backward/forward generators. Instead, it will test as much as possible with them to find the best ones. Not every attempt/work is successful. The project creates some reports on forums to report all attempts and works.
=License=
It is an opensourceopen-source, published with an MIT license.
=See also=
