Originally posted by Mathurineyea, it just gives the useless white bishop more breathing space.
Yep... 25...a5 was pointless.
Furthermore there were quite a few questionable moves in that game. I was extremely surprised at the result 😕
for Black, i would say just trade off one the Knights, keep the white queenside pawns locked where they are, stick the remaining knight on d3, gg.
EDIT: actually, let me restate this, a5 doesnt give the bish more breathing space, it gives it any, because it had none before.