1n1q1br1/r3pkp1/1p3p1n/p1pP4/QP1PbP1P/4P3/P2KN3/RNB4R b - - 1 21
FEN state: 1n1q1br1/r3pkp1/1p3p1n/p1pP4/QP1PbP1P/4P3/P2KN3/RNB4R b - - 1 21 ; Best move: c5b4
The current state of the chess board is: Black knight at b8, black queen at d8, black bishop at f8 and black rook at g8. Black rook at a7, black pawn at e7, black king at f7 and black pawn at g7. Black pawn at b6, black pawn at f6 and black knight at h6. Black pawn at a5, black pawn at c5 and white pawn at d5. White queen at a4, white pawn at b4, white pawn at d4, black bishop at e4, white pawn at f4 and white pawn at h4. White pawn at e3. White pawn at a2, white king at d2 and white knight at e2. 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.