r4b1r/p2k3p/1nnp2p1/1p2pP2/2p5/BPP2QPN/3P1P1P/1N3RK1 b - - 0 21
FEN state: r4b1r/p2k3p/1nnp2p1/1p2pP2/2p5/BPP2QPN/3P1P1P/1N3RK1 b - - 0 21 ; Best move: c4b3
The current state of the chess board is: Black rook at a8, black bishop at f8 and black rook at h8. Black pawn at a7, black king at d7 and black pawn at h7. Black knight at b6, black knight at c6, black pawn at d6 and black pawn at g6. Black pawn at b5, black pawn at e5 and white pawn at f5. Black pawn at c4. White bishop at a3, white pawn at b3, white pawn at c3, white queen at f3, white pawn at g3 and white knight at h3. White pawn at d2, white pawn at f2 and white pawn at h2. White knight at b1, white rook at f1 and white king at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.