1nbqkbr1/r1pp3p/4ppn1/pp1P1P2/8/NP5P/P1P2PPR/R2QKBN1 w Q - 1 12
FEN state: 1nbqkbr1/r1pp3p/4ppn1/pp1P1P2/8/NP5P/P1P2PPR/R2QKBN1 w Q - 1 12 ; Best move: a3b5
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black rook at a7, black pawn at c7, black pawn at d7 and black pawn at h7. Black pawn at e6, black pawn at f6 and black knight at g6. Black pawn at a5, black pawn at b5, white pawn at d5 and white pawn at f5. White knight at a3, white pawn at b3 and white pawn at h3. White pawn at a2, white pawn at c2, white pawn at f2, white pawn at g2 and white rook at h2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 12. White to move.