Pieces with dropshadow are not recognized

[Danny-Engelman]

Am working on a Chess teacher

Chesspieces are from https://commons.wikimedia.org/wiki/Category:SVG_chess_pieces/Maurizio_Monge

With extra dropshadows showing defense/attack

This is the 1997 Kasparov vs Deep Blue rematch game #1 (Deep Blue resigned after G7, but won the 6 game match)

Beta version at: https://chessly.github.io/?fen=4r3/8/2p2PPk/1p6/pP2p1R1/P1B5/2P2K2/3r4

Input is:

Wrong output is:

• Black King becomes White King
• White King becomes White Pawn
• White Bishop becomes White King (second one on the board)
• White Rook undetected
• Black Pawn with 2 dropshadows becomes Black Queen

HTH