ICCF engine vs engine match ( no dubious move 1-0)

f5 is bad move ( chessbase analysis ) lichess.org/study/o3HRLHph/mTrWy02u

Do not blame that on 5...f5.

@tpr have fun with engines it's book yep ( engines don't like stone wall setup )

what is black mistake ??

6...Nh6 looks suspect.

@tpr hmm 36. Qg7 Bd3!! +-