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Stockfish 3

Released 3 weeks ago on April 30, 2013

This is Stockfish 3.

The big news of this version, and the reason why we have bumped version number to 3 is not due to ELO increase (that anyhow should be interesting) nor to some cool feature, but it is due to the new super awesome testing framework that Gary setup and currently runs on

http://tests.stockfishchess.org/

This is really a new beginning for Stockfish development. A development that now is fully open and in just few weeks has already attract many people willing to test their ideas and some of their contributions have been already committed upstream: Lucas Braesch, Ryan Schmitt, Jean-Francois Romang, James Undery, Hiraoka Takuya, jhellis, Joona Kiisky (a great return!) and of course Gary Linscott.

As a technical note for people willing to compile themselves, this time you will find also the C++11 porting along the usual C++ sources. This is 100% fully functional equivalent of the std version, but on some platforms and with some compilers (like gcc 4.8) the C++11 binary may be even faster, but it’s up to you to try and to verify on your preferred platform :-)

A special thank to Jim for his always precious support in compiling the release version and to Daylen, our stockfishchess.org webmaster that silently and without fanfare has built a really beautiful site and a fully operational support service.

Have fun

Stockfish Team

Stockfish 2.3

Released 8 months ago on September 15, 2012

44 files changed, 3486 insertions(+), 3778 deletions(-)

ELO increase is very limited, it is mainly a minor release to flush the accumulated work. From the user point of view the biggest thing is that SF should not crash anymore even with many threads because a nasty SMP bug causing a rare but repetitive crash has been fixed.

Marco

Stockfish 2.2.2

Released 1 year ago on January 14, 2012

The 64-bit Windows compiles are built with GCC instead of Intel, so there is a 5-6% speed increase. Very few code changes: it should be a bit faster and a bug is fixed where Stockfish in some (rare) positions erroneously moves immediately without thinking.

Stockfish’s new signature is: 5447426

Marco

Stockfish 2.2.1

Released 1 year ago on January 6, 2012

This version fixes the time management issue. The signature is 5457475.

Marco

Update Jan 6, 2012: Stockfish 2.2.1 has been reposted to fix a compatibility issue with SSE4.2 Phenom processors.

Update Jan 7, 2012: Stockfish 2.2.1 for Android has been reposted to fix an issue in engine tournaments.

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