New version chess engine: Puffin 5.0

Puffin - UCI chess Engine, Author: Kurt

Rating Chess Engines Diary CEDR=2695 

v.5.0:

This update involved a lot of code refactoring but did include some improvements to net about 100 Elo in self-play. Some of the changes include:

Pawn push threats in evaluation

Passed pawn evaluation tweaks

2-ply continuation history

improving heuristic

I've also included a Linux binary for the first time. I have done minimal testing with the Linux binary, basically just to see if it actually runs. If you encounter any issues with that binary, please let me know.

Self-play LTC (60+0.6):

Score of Puffin 5.0 vs Puffin 4.0: 117 - 29 - 152  [0.648] 298

...      Puffin 5.0 playing White: 53 - 13 - 83  [0.634] 149

...      Puffin 5.0 playing Black: 64 - 16 - 69  [0.661] 149

...      White vs Black: 69 - 77 - 152  [0.487] 298

Elo difference: 105.7 +/- 27.5, LOS: 100.0 %, DrawRatio: 51.0 %

SPRT: llr 2.95 (100.1%), lbound -2.94, ubound 2.94 - H1 was accepted

 

Puffin 4.0 - results:

Opponent	Score	+-	Games
Seawall 20240926	3.5/4	+3	4 Games
CT800 1.46	3.5/4	+3	4 Games
Pedantic 2.1.0	0.5/4	-3	4 Games
Cheers 1.0.0	0.5/4	-3	4 Games
Rems 150824	0/4	-4	4 Games
Heimdall 1.0.0	0/4	-4	4 Games
SF PB 280924	0/4	-4	4 Games
SF-PRO 18.09.2024	0/4	-4	4 Games
Stockfish 17	0/4	-4	4 Games
CorChess 20240927	0/4	-4	4 Games
YuliGM STRONG 180824	0/4	-4	4 Games
RubiChess 20240817	0/4	-4	4 Games
Rems Sep24	0/4	-4	4 Games
JigSaw 6.0	0/4	-4	4 Games
Critter 1.6a	0.5/3	-2	3 Games
Plisco 0.4 JA	2/2	+2	2 Games
Evean 1.73	2/2	+2	2 Games
Snail Chess 1.0.1	2/2	+2	2 Games
Ares 2.3.14	2/2	+2	2 Games
Astra 3.0	2/2	+2	2 Games
Sapling 1-1-5	2/2	+2	2 Games

Puffin 5.0 download