rnb4r/4bk1p/1p2pPpR/p2p4/P1q1P3/5NB1/1PPK1P2/RN1Q1B2 b - - 1 21
FEN state: rnb4r/4bk1p/1p2pPpR/p2p4/P1q1P3/5NB1/1PPK1P2/RN1Q1B2 b - - 1 21 ; Best move: c4b4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black rook at h8. Black bishop at e7, black king at f7 and black pawn at h7. Black pawn at b6, black pawn at e6, white pawn at f6, black pawn at g6 and white rook at h6. Black pawn at a5 and black pawn at d5. White pawn at a4, black queen at c4 and white pawn at e4. White knight at f3 and white bishop at g3. White pawn at b2, white pawn at c2, white king at d2 and white pawn at f2. White rook at a1, white knight at b1, white queen at d1 and white bishop at f1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.