I'm not sure I got the promotions right, but I'm not good enough to play the game and get a Scorpion or Spear through to the back.
You don't have to test this with the AI switched on. You can just move a Pawn (or other promoting piece) to the promotion rank, to see what choice you get offered. You don't even have to use legal moves, or move the opponent. (But it is not possible to enter illegal captures, so the Pawn will have to eat its way through the enemy camp.)
Note you can tweek the square colors of the ID for an aestethically pleasing main diagram through parameters like light/darkShade, firstRank, rimColor, coordColor, useMarkers=1, etc.
You don't have to test this with the AI switched on. You can just move a Pawn (or other promoting piece) to the promotion rank, to see what choice you get offered. You don't even have to use legal moves, or move the opponent. (But it is not possible to enter illegal captures, so the Pawn will have to eat its way through the enemy camp.)
Note you can tweek the square colors of the ID for an aestethically pleasing main diagram through parameters like light/darkShade, firstRank, rimColor, coordColor, useMarkers=1, etc.