r3k1nr/p6p/3bpp1p/qNppn3/3P2b1/2P1P3/PP1NBP2/1RBQK3 w kq - 4 18
FEN state: r3k1nr/p6p/3bpp1p/qNppn3/3P2b1/2P1P3/PP1NBP2/1RBQK3 w kq - 4 18 ; Best move: b5d6
The current state of the chess board is: Black rook at a8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7 and black pawn at h7. Black bishop at d6, black pawn at e6, black pawn at f6 and black pawn at h6. Black queen at a5, white knight at b5, black pawn at c5, black pawn at d5 and black knight at e5. White pawn at d4 and black bishop at g4. White pawn at c3 and white pawn at e3. White pawn at a2, white pawn at b2, white knight at d2, white bishop at e2 and white pawn at f2. White rook at b1, white bishop at c1, white queen at d1 and white king at e1. Black kingside and black queenside castles are available. Half move number is 4. Full move number is 18. White to move.