r2qkr2/p1p2ppp/2n1b3/3ppP2/4PB1P/bpPP2RN/PP1K1P2/RN1Q1B2 b q - 0 13
FEN state: r2qkr2/p1p2ppp/2n1b3/3ppP2/4PB1P/bpPP2RN/PP1K1P2/RN1Q1B2 b q - 0 13 ; Best move: a3b2
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black rook at f8. Black pawn at a7, black pawn at c7, black pawn at f7, black pawn at g7 and black pawn at h7. Black knight at c6 and black bishop at e6. Black pawn at d5, black pawn at e5 and white pawn at f5. White pawn at e4, white bishop at f4 and white pawn at h4. Black bishop at a3, black pawn at b3, white pawn at c3, white pawn at d3, white rook at g3 and white knight at h3. White pawn at a2, white pawn at b2, white king at d2 and white pawn at f2. White rook at a1, white knight at b1, white queen at d1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 0. Full move number is 13. Black to move.