rn1k3r/p1p2pn1/1pPbp2p/Pb4p1/1B6/5PPP/1P2P1R1/R2QKB2 w Q - 2 18
FEN state: rn1k3r/p1p2pn1/1pPbp2p/Pb4p1/1B6/5PPP/1P2P1R1/R2QKB2 w Q - 2 18 ; Best move: b4d6
The current state of the chess board is: Black rook at a8, black knight at b8, black king at d8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at f7 and black knight at g7. Black pawn at b6, white pawn at c6, black bishop at d6, black pawn at e6 and black pawn at h6. White pawn at a5, black bishop at b5 and black pawn at g5. White bishop at b4. White pawn at f3, white pawn at g3 and white pawn at h3. White pawn at b2, white pawn at e2 and white rook at g2. White rook at a1, white queen at d1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 2. Full move number is 18. White to move.