Surprise came when, after the Semifinals, a series of bonus matches happened. Now Mystery with a much lower speed indicating that it could be now using NN and defeating well-established engines like Koivisto (0, 2, 23, 25, 0), Berserk (0, 4, 34, 12, 0) and Ethereal (0, 3, 29, 18, 0) and losing to Komodo Dragon (0, 21, 25, 4, 0) becoming the 4th best engine in the field out of thin air.
From the game logs we can see that the options changed from the main event to the bonus
Author: Unknown -> Mystery
New option: UCI_Chess960
New option: MoveOverhead
New option: Minimal
Evalfile default: "" -> embedded
Clear hash name: Clear Hash -> ClearHash
Code: Select all
> uci
< Mystery by Unknown
< id name Mystery
< id author Unknown
< option name Pretty type check default false
< option name EvalFile type string default
< option name Clear Hash type button
< option name Hash type spin default 16 min 2 max 1048576
< option name Threads type spin default 1 min 1 max 256
< uciok
Code: Select all
> uci
< Mystery by Mystery
< id name Mystery
< id author Mystery
< option name UCI_Chess960 type check default false
< option name MoveOverhead type spin default 10 min 0 max 5000
< option name Minimal type check default false
< option name Pretty type check default false
< option name EvalFile type string default embedded
< option name ClearHash type button
< option name Hash type spin default 16 min 2 max 1048576
< option name Threads type spin default 1 min 1 max 256
< uciok
The options don't seem to match any known engine found on GitHub.
What engine do you think it could be?
