r1b1kb2/p4pp1/2n4r/1p2Q1Np/1Ppp2B1/N5P1/P2KP2P/R2n2R1 b q - 0 20
FEN state: r1b1kb2/p4pp1/2n4r/1p2Q1Np/1Ppp2B1/N5P1/P2KP2P/R2n2R1 b q - 0 20 ; Best move: c6e5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at f7 and black pawn at g7. Black knight at c6 and black rook at h6. Black pawn at b5, white queen at e5, white knight at g5 and black pawn at h5. White pawn at b4, black pawn at c4, black pawn at d4 and white bishop at g4. White knight at a3 and white pawn at g3. White pawn at a2, white king at d2, white pawn at e2 and white pawn at h2. White rook at a1, black knight at d1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.