Chess engine: Polyfish 20231022

 

Polyfish is a UCI chess engine based on Stockfish. Rating CEDR=3735

Overview

**Polyfish** is a UCI chess engine based on [Stockfish](https://github.com/official-stockfish). It is identical to Stockfish with the added capability of handling [Polyglot](https://web.archive.org/web/20191216195456/http://hardy.uhasselt.be/Toga/book_format.html) and [CTG](https://www.chessprogramming.org/CTG) book.

**Polyfish** supports two books at the same time, one could configure two CTG books, two BIN books, or one CTG and one BIN in either order. The second book is only probed if the first book has no moves for the given position. The engine starts searching only if no move is found in either the first book or the second book.

Read [Note about CTG books](https://github.com/khalid-a-omar/Polyfish#note-about-ctg-books)

Read [Questions and Answers about Polyfish book support](https://github.com/khalid-a-omar/Polyfish#questions-and-answers)

Rating CEDR progres: Polyfish

Pl	Engine	Rating	Score	Games	%
26	Polyfish 20230426	3741.3	27.00	44	61.36
30	Polyfish 230509	3740.3	37.50	52	72.12
41	Polyfish 221009	3735.1	315.00	520	60.58
45	Polyfish 230604	3733.1	59.00	112	52.68
92	Polyfish 230115	3725.8	304.00	432	70.37
106	Polyfish 230426	3724.4	236.50	335	70.60
114	Polyfish 20230421	3723.7	58.00	92	63.04
119	Polyfish 20230304	3723.0	284.50	463	61.45
122	Polyfish 230621	3722.7	109.00	175	62.29
128	Polyfish 20230326	3722.1	132.50	218	60.78
152	Polyfish 230807	3720.2	335.50	510	65.78
165	Polyfish 230708	3719.4	133.00	235	56.60
188	Polyfish 230202	3718.1	223.50	356	62.78
195	Polyfish 230607	3717.4	92.50	146	63.36
202	Polyfish 230510	3717.1	181.50	310	58.55
205	Polyfish 220826	3716.9	67.50	100	67.50
222	Polyfish 20230410	3715.9	99.50	136	73.16
265	Polyfish 20230402	3713.8	37.00	47	78.72
296	Polyfish 20230325	3712.1	92.50	140	66.07
306	Polyfish 22057	3711.6	43.50	56	77.68
385	Polyfish 221210	3704.1	287.00	435	65.98

Polyfish 231022 download