Scan: https://t.co/RtuRu8hMid The idea reminds me a lot of the so-called 碁盤歌 by 10c poet Minamoto-no Shitagō 源順 aka M'n'S: poems arranged in a chessboard-like manner (or also imitating a sugoroku board in the so-called 双六盤歌). 2/