1n1qkb1r/1ppn2pp/3r1p2/1B1ppP2/P7/Bp3PNR/1QPP2PP/4K1NR w k - 1 18
FEN state: 1n1qkb1r/1ppn2pp/3r1p2/1B1ppP2/P7/Bp3PNR/1QPP2PP/4K1NR w k - 1 18 ; Best move: b2b3
The current state of the chess board is: Black knight at b8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black knight at d7, black pawn at g7 and black pawn at h7. Black rook at d6 and black pawn at f6. White bishop at b5, black pawn at d5, black pawn at e5 and white pawn at f5. White pawn at a4. White bishop at a3, black pawn at b3, white pawn at f3, white knight at g3 and white rook at h3. White queen at b2, white pawn at c2, white pawn at d2, white pawn at g2 and white pawn at h2. White king at e1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 18. White to move.