In December 2021 Ryan Hudgens (aka OreKehStrah) proposed PCS+1
PCS+1 is an extension of PLL+1 that allows for the second block corners to be swapped. Then those corners are corrected during PCS+1.
https://www.speedsolving.com/threads/pcs-1-an-expansion-algset-for-square-1lin-method-solvers.90692/
https://docs.google.com/spreadsheets/d/1_L5w2IXfaMg_j4TPkG_Vpi4EGAH9fsqCk_y_09toTUE/edit?usp=sharing
https://discord.com/channels/795860600139153408/795860600139153411/922730368900161536