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asmFish: Updated October, 22 2019

Available for: Windows, Linux, macOS. NOT ANDROID!


Changelog: Add continuation history 5 bench 2807233 …




Maximize its strength by using my opening book Goi.


asmFish becomes now asmFishCP, since the source of this latest one is on GitHub and the original asmFish is not updated anymore.


asmFishCP is a Stockfish derived engine written in assembler by Justin Dehorty (CounterPly), the strong point of it is to have a smaller executable, hence faster.

The rewriting means that asmFish could not be the latest beta Stockfish translation and that there could be bugs, due to the minor testing time of this engine compared to the Stockfish releases. Anyway in one year of testing I've seen it works very well on powerful mainframes with many threads/cores.

Matefinder is also included in the package.


asmFish official GitHub page.


The BookDepth issue:

WARNING: I've accidentally found a serious issue that could totally spoil many test you've made with BIN books: the BookDepth value is different between asmFish and the other engines. asmFish measures the BookDepth in plies, that is 1/2 move (1 White move + 1 Black move = 2 plies), while the other engines measure it in effective moves. So if you are making a test between asmFish and the other engines with a limited amount of book moves, please be sure to set double the value for asmFish.

For example, we want to make a test up to the move 15: for asmFish BookDepth will be 30, while for other engines like Stockfish Polyglot or Brainfish will be 15. NOT YET VERIFIED ON THE NEW VERSION.





04/10/19 poll average vote: 8.54.