rnb1k2r/1pppq3/p4p1p/6p1/2P1n1P1/b4N2/PP2PPBP/RNBQK2R b q - 1 13
FEN state: rnb1k2r/1pppq3/p4p1p/6p1/2P1n1P1/b4N2/PP2PPBP/RNBQK2R b q - 1 13 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at d7 and black queen at e7. Black pawn at a6, black pawn at f6 and black pawn at h6. Black pawn at g5. White pawn at c4, black knight at e4 and white pawn at g4. Black bishop at a3 and white knight at f3. White pawn at a2, white pawn at b2, white pawn at e2, white pawn at f2, white bishop at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 13. Black to move.