My dogs don't like the noises


It is probably an important topic. Few times i've also accidentally jumped off a chair on check or mate sound. They actually may be mentally damageful and the fact that animals dont like them is a sign for that.
Like with an AI-generated art, it is possible that unconsciously taken sounds can do damage like if sound was a modified scream of pain or torture or something else really bad
Maybe this is intentional to develop a psychological dependecy from those sounds and make users return the website to hear them again
No joke, please notice this

My dog is the same. Literally shoots out of the room when he hears a piece move. Never got as far as hearing the check sound
Bit late here, but my dog starts climbing all over me and being affectionate whenever he hears the sounds. I put it down to him associating the sounds with me getting frustrated/swearing while playing chess. My dog comes to comfort me when stressed, and therefore they've become a cue for him to comfort me.