Another 'blog this so it doesn't get lost in my bookmarks mess' post

Chess meets checkers - 'Chessers'

Standard chess setup, except that 4 pawns advance one step, and the resulting empty spaces on ranks 2 & 3 (7 & 6) get filled in with checkers (8 checkers per side vs the traditional 12.)

https://schwartztronica.wordpress.com/2010/05/09/checkmate-by-checkers/

Multiple variations listed. A followup post was promised but apparently never happened.