So with this here, we have the info
'From Holland, 1696. Guards move as rooks, capture as bishops. Ensigns move as bishops, capture as rooks.'
This page here ..
http://www.quadibloc.com/chess/ch0502.htm
it says here ..
'D. B. Pritchard's Encyclopedia of Chess Variants brought to my attention an extended form of Chess from 1696, called Enlarged and Improved Chess.'
(And further down the page, we have) ...
'the two added pieces were the Ensign, a Bishop-mover/Rook-capturer, and the Guard, a Rook-mover/Bishop-capturer.'
So with this here, we have the info 'From Holland, 1696. Guards move as rooks, capture as bishops. Ensigns move as bishops, capture as rooks.' This page here .. http://www.quadibloc.com/chess/ch0502.htm
it says here .. 'D. B. Pritchard's Encyclopedia of Chess Variants brought to my attention an extended form of Chess from 1696, called Enlarged and Improved Chess.' (And further down the page, we have) ... 'the two added pieces were the Ensign, a Bishop-mover/Rook-capturer, and the Guard, a Rook-mover/Bishop-capturer.'
So, these two pieces sound exactly like the ones in this game yeah, https://www.chessvariants.com/diffmove.dir/thinktank.html
The Bisroo - Bishop-mover/Rook-capturer
The Roobis - Rook-mover/Bishop-capturer
that is correct yes, hopefully i got it right lol