rnb1kbn1/1p4p1/p1pp4/5p1r/NP3P2/3PPKpP/PBP5/1R3B1R w q - 1 19
FEN state: rnb1kbn1/1p4p1/p1pp4/5p1r/NP3P2/3PPKpP/PBP5/1R3B1R w q - 1 19 ; Best move: a4b6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at b7 and black pawn at g7. Black pawn at a6, black pawn at c6 and black pawn at d6. Black pawn at f5 and black rook at h5. White knight at a4, white pawn at b4 and white pawn at f4. White pawn at d3, white pawn at e3, white king at f3, black pawn at g3 and white pawn at h3. White pawn at a2, white bishop at b2 and white pawn at c2. White rook at b1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 19. White to move.