r1bqn2r/1ppk4/4pb2/p1Ppnp1p/2NP1P2/4B2P/PPQ1P1K1/1R3B1R b - - 3 21
FEN state: r1bqn2r/1ppk4/4pb2/p1Ppnp1p/2NP1P2/4B2P/PPQ1P1K1/1R3B1R b - - 3 21 ; Best move: e5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black knight at e8 and black rook at h8. Black pawn at b7, black pawn at c7 and black king at d7. Black pawn at e6 and black bishop at f6. Black pawn at a5, white pawn at c5, black pawn at d5, black knight at e5, black pawn at f5 and black pawn at h5. White knight at c4, white pawn at d4 and white pawn at f4. White bishop at e3 and white pawn at h3. White pawn at a2, white pawn at b2, white queen at c2, white pawn at e2 and white king at g2. White rook at b1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 21. Black to move.