Starting positions in Chess960 where black is definitely worse In article in wiki about chess960, it is stated that:


  It has been argued that two games should be played from each starting
  position, with players alternating as White and Black, since some
  initial positions may offer White a bigger advantage than in standard
  chess. For example, in some Chess960 starting positions White can
  attack an unprotected black pawn after the first move, whereas in
  standard chess it takes two turns for White to attack and there are no
  unprotected pawns


But what are these positions? Is there a comprehensive study of some of them?
I asked myself the same question a year ago.

I found this interesting page: http://computerchess.org.uk/ccrl/404FRC/opening_report_by_white_score.html#table_start

With statistics for every 960 positions based on 144,300 games played by 123 engines.

Apparently the position that gives the biggest advantage to White is RKNQBBNR with a White score of 63.9%.

Note that on the previous page the standard position has a White score of 56.0%. I once read that the true White score in standard chess is 55.5% for GM games. Since these two numbers are pretty close it would seem that the statistics of the previous page are meaningful and pretty accurate.

Also, someone once told me that if we just inverted Knights and Rooks then White would have a big advantage: NRBQKBRN.
But the previous page actually says that White only scores 47.4% in that position, so maybe he was wrong.

Anyway, I seriously doubt there exists a position where White has an advantage of +0.50 or more. And every single one of the 960 positions are very probably just draws with best play.