r1q1kb2/1pp1p2r/p1n2pp1/5n1p/2Pp1B1P/P2P1N2/1P1QPP2/R2NK2B b q - 1 20
FEN state: r1q1kb2/1pp1p2r/p1n2pp1/5n1p/2Pp1B1P/P2P1N2/1P1QPP2/R2NK2B b q - 1 20 ; Best move: e7e5
The current state of the chess board is: Black rook at a8, black queen at c8, black king at e8 and black bishop at f8. Black pawn at b7, black pawn at c7, black pawn at e7 and black rook at h7. Black pawn at a6, black knight at c6, black pawn at f6 and black pawn at g6. Black knight at f5 and black pawn at h5. White pawn at c4, black pawn at d4, white bishop at f4 and white pawn at h4. White pawn at a3, white pawn at d3 and white knight at f3. White pawn at b2, white queen at d2, white pawn at e2 and white pawn at f2. White rook at a1, white knight at d1, white king at e1 and white bishop at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.