v1.3.0

This release is expected to be a significant improvement over 1.2, perhaps enough to win CCRL's 104th Amateur D9. The main driver of the elo gain is the addition of dynamic move ordering (#27). We also expect smaller elo gain from small changes: minor evaluation enhancements (#30), modification of the move order heuristics (#31), prioritizing exploitation more in search (#32, which wouldn't have passed without the move order change), and introducing aspiration windows (#33). There are also some fixes related to the way Rengar handles draw scores in the transposition table (#22) and stops the search when finding a mate (#29). Move generation is also slightly more performant now that the move queue avoids heap allocation (#23, which also enabled dynamic move order). Rengar will now flush the buffer after each log statement for a better viewing experience. Finally, the hashbits option is now deprecated, as the hash option is more in line with the behavior of other engines.

v1.2.0

For details of the changes affecting elo see the discription of #17. This version also fixes the timeouts seen in 15/40 games on CCRL by simply setting a hard upper limit on time used for a single move (at most 1/4 of remaining time).

v1.1.0

For details see the discription of #9

Statically linked executable

The executables here should be standalone. Their only .dll dependencies are windows system32 files, specifically:

• ntd.dll
• KERNEL32.dll
• KERNELBASE.dll
• apphelp.dll
• ucrtbase.dll

As before there is a version both with and without the BMI2 instructions.

Windows and pre-BMI2 support

This release includes a .exe binary runnable on windows. There is also a build that omits BMI and BMI2 instructions (TZCNT, PEXT, and PDEP). It is functionally identical to v1.0.0.

Rengar 1.0.0

Initial release of Rengar. Expected strength ~2500 CCRL blitz.