I noticed that during the first fight when I just held down 'block', I would block attacks and the game would just say
BLOCK. However, at one moment I let go of the block button to do an attack, but I noticed my opponent was attacking as well, so I pressed block again. The game then said
I have been unable to repeat this after that, but my guess is it's something to do with timing. If so: how should I time my block move? If not: what does it depend on?