r1bq1br1/p1pppkp1/5n1p/1p6/1nP5/3PP3/PP3PPP/RNBK1BNR b - - 0 10
FEN state: r1bq1br1/p1pppkp1/5n1p/1p6/1nP5/3PP3/PP3PPP/RNBK1BNR b - - 0 10 ; Best move: b5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at c7, black pawn at d7, black pawn at e7, black king at f7 and black pawn at g7. Black knight at f6 and black pawn at h6. Black pawn at b5. Black knight at b4 and white pawn at c4. White pawn at d3 and white pawn at e3. White pawn at a2, white pawn at b2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 10. Black to move.