Since you’re here...

We hope you will consider supporting us today. We need your support to continue to exist, because good entries are more and more work time. Every reader contribution, however big or small, is so valuable. Support "Chess Engines Diary" even a small amount– and it only takes a minute. Thank you.
============================== My email: jotes@go2.pl



Adeon 1.2.1 - new version chess engine


Adeon, a simple UCI-compliant chess engine, written in C# using the MinimalChess library. Based on code from the TIChess 4.0 engine.
Author: OneHalf (KawaiiFiveO)


Adeon has a notable feature: its "Style" profiles allow you to customize the playstyle of the engine. Choose from existing profiles, or create your own!

Features
Search Algorithm: An improved version of TIChess's NegaMax Alpha-Beta search algorithm.
Opening Book: Loaded from a customizable book.json file.
Style Profiles: styles.json enables support for different engine personalities and playing styles.
Move Ordering & Search Efficiency: Search performance is enhanced through several techniques:
Transposition Table: A hash table is used to store previously analyzed positions, preventing redundant calculations.
MVV-LVA: Captures are prioritized by sorting the "Most Valuable Victim" against the "Least Valuable Aggressor".
Killer Move Heuristic: Quiet moves that cause a beta-cutoff are tried earlier in subsequent nodes at the same depth.
Null Move Pruning: The engine speculatively gives the opponent a free move; if the resulting position is still very strong for the engine, it assumes the original line is not worth a deep search and prunes it, saving valuable time.
Late Move Reductions: Saves time by focusing effort on the most promising moves, while a re-search mechanism ensures that surprisingly good moves are not missed.
Quiescence Search: To avoid the horizon effect, the search is extended beyond its nominal depth to analyze tactical sequences (captures and check evasions) until the position is "quiet."
Framework: The core algorithm runs within a UCI-compliant shell that handles:
Communication with chess GUIs (Universal Chess Interface).
Iterative deepening and time management in a separate thread.

Profiles
In your frontend, you can set a Style for Adeon. These profiles change the behavior of the engine. Currently, the profiles are:
Normal: Adeon will play at full strength.
Easy: Adeon will limit searching to a depth of 5. This is comparable to playing TIChess on a real calculator.
The Chess.com Cheater: Try it for yourself and see ;)
The Unhinged Gambiteer: ?!
Sample Games
Adeon (Easy) vs. Toledo NanoChess (~1000 Elo)
MinimalChess 0.4 (1816 Elo) vs. Adeon (Cheater)

Strength
Adeon (Normal/Cheater) is currently estimated to play at a ~2100 Elo level, but profiles such as Unhinged Gambiteer are weaker, estimated around ~1600.



Comments