Arc of CHESS released the music video for their new song “十六夜” (Izayoi) on 2025/01/08. It is a shortened, “arranged for Youtube” version (the full version which they plan on streaming sometime in the future is 6 mins long).
the kings strike again 
mentioned a few months ago by @Jigsaw
Arc of CHESS released 3 singles " 十六夜" , “追憶のB譜 (英語版)” and “Despair” at 04/01
Tracklist:
01 十六夜
Tracklist:
01 追憶のB譜 (英語版)
Tracklist:
01 Despair
Woohoo finally! Thanks for the heads-up!
edit: btw there are a bunch of new singles that were released in mid-March too apparently! They all have the umbrella title of “lovesong” on streaming platforms, 13 songs in total. 
According to their official website, the 13 single tracks is their 4th album (also referred to as a best album) “恋奏集 ～Reasons～”, which hadn’t been released on streaming platforms before.
I assume these 3 new tracks might be a precursor to an upcoming full-length, or at least I don’t recognize the song titles on their website in any of the previous CD releases.
Arc of CHESS released more singles:
more 2 singles was added
