1r3bnr/pb1p2pp/np1q1kP1/2pp1p2/P1PP4/1P2P3/4BP1P/R1BK2NR b - - 0 15
FEN state: 1r3bnr/pb1p2pp/np1q1kP1/2pp1p2/P1PP4/1P2P3/4BP1P/R1BK2NR b - - 0 15 ; Best move: d5c4
The current state of the chess board is: Black rook at b8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at d7, black pawn at g7 and black pawn at h7. Black knight at a6, black pawn at b6, black queen at d6, black king at f6 and white pawn at g6. Black pawn at c5, black pawn at d5 and black pawn at f5. White pawn at a4, white pawn at c4 and white pawn at d4. White pawn at b3 and white pawn at e3. White bishop at e2, white pawn at f2 and white pawn at h2. White rook at a1, white bishop at c1, white king at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 15. Black to move.