4kb1r/r4ppp/2ppbn2/p2p4/1pP1P1P1/Pn3P2/1P1PK1BP/R1BQ3R w k - 0 18
FEN state: 4kb1r/r4ppp/2ppbn2/p2p4/1pP1P1P1/Pn3P2/1P1PK1BP/R1BQ3R w k - 0 18 ; Best move: d1b3
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at h8. Black rook at a7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at c6, black pawn at d6, black bishop at e6 and black knight at f6. Black pawn at a5 and black pawn at d5. Black pawn at b4, white pawn at c4, white pawn at e4 and white pawn at g4. White pawn at a3, black knight at b3 and white pawn at f3. White pawn at b2, white pawn at d2, white king at e2, white bishop at g2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. White to move.