rN2qb1r/p2ppk1p/2b2n2/1p1PBp2/7P/6p1/PPPNPPP1/RQ2KBR1 w Q - 0 18
FEN state: rN2qb1r/p2ppk1p/2b2n2/1p1PBp2/7P/6p1/PPPNPPP1/RQ2KBR1 w Q - 0 18 ; Best move: b8c6
The current state of the chess board is: Black rook at a8, white knight at b8, black queen at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at d7, black pawn at e7, black king at f7 and black pawn at h7. Black bishop at c6 and black knight at f6. Black pawn at b5, white pawn at d5, white bishop at e5 and black pawn at f5. White pawn at h4. Black pawn at g3. White pawn at a2, white pawn at b2, white pawn at c2, white knight at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white queen at b1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.