rn1qkb2/p3p1pr/2p3pB/3pP2p/1pN5/1bPP1P1P/P5PR/1R1QKB2 w q - 0 18
FEN state: rn1qkb2/p3p1pr/2p3pB/3pP2p/1pN5/1bPP1P1P/P5PR/1R1QKB2 w q - 0 18 ; Best move: d1b3
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at e7, black pawn at g7 and black rook at h7. Black pawn at c6, black pawn at g6 and white bishop at h6. Black pawn at d5, white pawn at e5 and black pawn at h5. Black pawn at b4 and white knight at c4. Black bishop at b3, white pawn at c3, white pawn at d3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at g2 and white rook at h2. White rook at b1, white queen at d1, white king at e1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.