r1b1k1nr/p2p4/2pbpQ2/np5p/1P2NP2/P1PP3B/4K2P/RNB4R b - - 1 21
FEN state: r1b1k1nr/p2p4/2pbpQ2/np5p/1P2NP2/P1PP3B/4K2P/RNB4R b - - 1 21 ; Best move: g8f6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7 and black pawn at d7. Black pawn at c6, black bishop at d6, black pawn at e6 and white queen at f6. Black knight at a5, black pawn at b5 and black pawn at h5. White pawn at b4, white knight at e4 and white pawn at f4. White pawn at a3, white pawn at c3, white pawn at d3 and white bishop at h3. White king at e2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.