r1b4r/p1kpnp1p/np1b2p1/P2Qp1q1/R5PP/5P1N/1PP1P3/1NB1KB1R w - - 5 18
FEN state: r1b4r/p1kpnp1p/np1b2p1/P2Qp1q1/R5PP/5P1N/1PP1P3/1NB1KB1R w - - 5 18 ; Best move: d5c4
The current state of the chess board is: Black rook at a8, black bishop at c8 and black rook at h8. Black pawn at a7, black king at c7, black pawn at d7, black knight at e7, black pawn at f7 and black pawn at h7. Black knight at a6, black pawn at b6, black bishop at d6 and black pawn at g6. White pawn at a5, white queen at d5, black pawn at e5 and black queen at g5. White rook at a4, white pawn at g4 and white pawn at h4. White pawn at f3 and white knight at h3. White pawn at b2, white pawn at c2 and white pawn at e2. White knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 5. Full move number is 18. White to move.