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Chess engine: Igel 2.2.0 (Windows, Linux, Mac and RaspberryPi)

on

Igel - UCI chess engine, Rating JCER=2869
Author : Volodymyr Shcherbyna (Fork of GreKo 2018.01)

 Igel 2.2.0
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  • Fix futility pruning and use it only after at least one legal move has been played,
  • Fix 32bit overflow in syzygy probing code that caused bugs when probing 7 piece positions
  • Fix syncronisation issue that caused "connection stalled" in Linux OS
  • Fix overflow bug that prevented using transposition table bigger than 32 GB
  • Improve performance in SMP mode and avoid copying the pawn hash table for each worker
  • Improve performance in SMP mode when clearing large hash size (more than 64 Gb)
  • Improve performance in SMP mode and solve cache coherency issues when calculating node/tbhits count
  • Improve performance of tuner and perform multithreaded texel tuning
  • Improve performance and use hardware instruction to count leading zeroes (lsb/poplsb)
  • Improve performance in SMP mode and start worker threads before the main thread
  • Improve performance in SMP mode and skip random depths by worker threads (Laser/Ethereal method)
  • Improve performance in Linux OS and use -flto compiler option (around 10% of increase of NPS)


Igel 2.2.0 - download
All files (games, tables and engines) - download from page

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