Sure maybe the translation is wrong, but I'm saying there's bias in the test due to the fact it only plays sicilian to 1.e4. What about 1.e6 or 1.e5? Hard to estimate fide or lichess rating if you don't test those.

According to https://lichess.org/analysis#1, for blitz and rapid games played on lichess with 1.e4, 1...e5 is 33%, 1...c5 is 25% and 1...e6 is 10%. And 35% is some other nonsense.

Computer chess tournaments solve this problem by requiring the computers to play specific openings.