While browsing I came across another couple of games with ski‐sliders: Quang Trung Chess has a ski‐rook from its third edition (except the fourth, where it's a ski‐queen); the comments on the 4th‐ed. page here also reveal Snark Hunt's Boojum, also a ski‐queen (and its Snark, which moves as either king or boojum but demotes to the latter when moving as such)
While browsing I came across another couple of games with ski‐sliders: Quang Trung Chess has a ski‐rook from its third edition (except the fourth, where it's a ski‐queen); the comments on the 4th‐ed. page here also reveal Snark Hunt's Boojum, also a ski‐queen (and its Snark, which moves as either king or boojum but demotes to the latter when moving as such)