r1b1n1nr/p2q3p/2pppkp1/1pP2pbB/3P1B2/PQ5N/1P2PP1P/RN2K1R1 b - - 0 21
FEN state: r1b1n1nr/p2q3p/2pppkp1/1pP2pbB/3P1B2/PQ5N/1P2PP1P/RN2K1R1 b - - 0 21 ; Best move: g5f4
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at e8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at d7 and black pawn at h7. Black pawn at c6, black pawn at d6, black pawn at e6, black king at f6 and black pawn at g6. Black pawn at b5, white pawn at c5, black pawn at f5, black bishop at g5 and white bishop at h5. White pawn at d4 and white bishop at f4. White pawn at a3, white queen at b3 and white knight at h3. White pawn at b2, white pawn at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.