rnbq1kr1/1p1pbp2/p1p2n1p/1P2p1p1/3PP1P1/B4N1B/P1P2PRP/RN1QK3 b Q - 0 13
FEN state: rnbq1kr1/1p1pbp2/p1p2n1p/1P2p1p1/3PP1P1/B4N1B/P1P2PRP/RN1QK3 b Q - 0 13 ; Best move: e7a3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at f8 and black rook at g8. Black pawn at b7, black pawn at d7, black bishop at e7 and black pawn at f7. Black pawn at a6, black pawn at c6, black knight at f6 and black pawn at h6. White pawn at b5, black pawn at e5 and black pawn at g5. White pawn at d4, white pawn at e4 and white pawn at g4. White bishop at a3, white knight at f3 and white bishop at h3. White pawn at a2, white pawn at c2, white pawn at f2, white rook at g2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1 and white king at e1. White queenside is the only castle move available. Half move number is 0. Full move number is 13. Black to move.