r2q1r2/2pb2kp/8/pp1PppP1/1PPn2P1/b5KN/P2PB2P/RNB2R2 b - - 2 21
FEN state: r2q1r2/2pb2kp/8/pp1PppP1/1PPn2P1/b5KN/P2PB2P/RNB2R2 b - - 2 21 ; Best move: d4e2
The current state of the chess board is: Black rook at a8, black queen at d8 and black rook at f8. Black pawn at c7, black bishop at d7, black king at g7 and black pawn at h7. Black pawn at a5, black pawn at b5, white pawn at d5, black pawn at e5, black pawn at f5 and white pawn at g5. White pawn at b4, white pawn at c4, black knight at d4 and white pawn at g4. Black bishop at a3, white king at g3 and white knight at h3. White pawn at a2, white pawn at d2, white bishop at e2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1 and white rook at f1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. Black to move.