1rb3Br/p2kb3/n7/1p2p1B1/QpP3P1/P2PPp1N/5P2/RN3K1R b - - 0 21
FEN state: 1rb3Br/p2kb3/n7/1p2p1B1/QpP3P1/P2PPp1N/5P2/RN3K1R b - - 0 21 ; Best move: b5a4
The current state of the chess board is: Black rook at b8, black bishop at c8, white bishop at g8 and black rook at h8. Black pawn at a7, black king at d7 and black bishop at e7. Black knight at a6. Black pawn at b5, black pawn at e5 and white bishop at g5. White queen at a4, black pawn at b4, white pawn at c4 and white pawn at g4. White pawn at a3, white pawn at d3, white pawn at e3, black pawn at f3 and white knight at h3. White pawn at f2. White rook at a1, white knight at b1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.