rnqk1b2/p1p2n1r/1pb2P2/3pp2p/1P1BPQ1P/N7/P1PP2P1/R3K1NR w KQ - 4 18
FEN state: rnqk1b2/p1p2n1r/1pb2P2/3pp2p/1P1BPQ1P/N7/P1PP2P1/R3K1NR w KQ - 4 18 ; Best move: d4e5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at c8, black king at d8 and black bishop at f8. Black pawn at a7, black pawn at c7, black knight at f7 and black rook at h7. Black pawn at b6, black bishop at c6 and white pawn at f6. Black pawn at d5, black pawn at e5 and black pawn at h5. White pawn at b4, white bishop at d4, white pawn at e4, white queen at f4 and white pawn at h4. White knight at a3. White pawn at a2, white pawn at c2, white pawn at d2 and white pawn at g2. White rook at a1, white king at e1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 4. Full move number is 18. White to move.