Monolith 2

This is the version for TCEC Season 18.
Strength gain estimate (bullet games):

Score of Monolith 2 vs Monolith 1.0: 6949 - 886 - 2165 [0.803] 10000
Elo difference: 244.26 +/- 6.94

Monolith 1.0

I'm very proud to finally release Monolith 1.0 after almost 2 years of delights and frustration.
The engine is certainly nothing ground breaking but simply a plain old alpha-beta-searcher like hundreds of its kind, but writing it has enriched those past 2 years immensely. To every non-programmer out there:
If you want to broaden your horizon and learn a programming language, there's no better way to get started than to write a chess engine. Yes, it demands a great lot of time, but I regret no single hour of it.

Main changes are:

• added support for multi-processors with simplified-ABDADA
• added support for syzygy endgame-tablebases
• added support for PEXT instruction
• added new search enhancements (SEE pruning, singular extension, LMR, aspiration window)
• added new evaluation terms
• tuned the evaluation automatically with Texel's tuning method
• simplified the code
• fixed a bug that caused crashes while moving backwards through the game

Strength estimate (bullet games):
Score of Monolith 1.0 vs Monolith 0.4: 6481 - 1470 - 2049 [0.751] 10000
Elo difference: 191.36 +/- 6.70

Monolith 0.4

Main changes are:

• added support for Fischer Random Chess
• added support for the UCI 'MultiPV' option
• added pawn hash table
• added check- and evasion-generation in quiescence search
• improved Null Move pruning
• added Internal Iterative Deepening
• added Late Move Pruning
• huge number of other small additions, improvements and bug-fixes

Monolith 0.3

Main changes are:

• added Principal Variation Search
• added reverse futility pruning
• added SEE for move-ordering
• added SEE pruning in quiescence search
• new and improved search extensions
• higher rook-on-open-file bonus
• a lot of small evaluation tweaks
• transposition table improvements
• new staged and pseudolegal move generator (sadly a Elo loss)
• completely rewritten UCI handling
• added new important UCI options
• fixed the reported bug that prevented the use of external opening books
• added support to use internal books under Linux
• a lot of other bug fixes and improvements

Monolith 0.2

Main changes are:

• completely rewritten move-ordering
  • added MVV-LVA
  • added Killer Heuristic
  • added History Heuristic
• completely rewritten evaluation
  • added mobility score, passed pawn bonus, king safety, tempo bonus, bishop pair bonus, knights-connected bonus, rook on (semi)open file bonus
• many search tweaks
• heavy hash-table bug fix and a lot of other bug fixes

Monolith 0.1