rnb1k3/1pnp1pp1/p1p4r/q3P2p/N1P1P2P/P5BN/5PP1/b2K1B1R b - - 2 21
FEN state: rnb1k3/1pnp1pp1/p1p4r/q3P2p/N1P1P2P/P5BN/5PP1/b2K1B1R b - - 2 21 ; Best move: a5a4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black king at e8. Black pawn at b7, black knight at c7, black pawn at d7, black pawn at f7 and black pawn at g7. Black pawn at a6, black pawn at c6 and black rook at h6. Black queen at a5, white pawn at e5 and black pawn at h5. White knight at a4, white pawn at c4, white pawn at e4 and white pawn at h4. White pawn at a3, white bishop at g3 and white knight at h3. White pawn at f2 and white pawn at g2. Black bishop at a1, white king at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. Black to move.