rn4nr/p1p3Np/1pb4k/1B2p1p1/1bPq4/1PN1PP1P/P5P1/R2QK2R b Q - 0 20
FEN state: rn4nr/p1p3Np/1pb4k/1B2p1p1/1bPq4/1PN1PP1P/P5P1/R2QK2R b Q - 0 20 ; Best move: d4c3
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, white knight at g7 and black pawn at h7. Black pawn at b6, black bishop at c6 and black king at h6. White bishop at b5, black pawn at e5 and black pawn at g5. Black bishop at b4, white pawn at c4 and black queen at d4. White pawn at b3, white knight at c3, white pawn at e3, white pawn at f3 and white pawn at h3. White pawn at a2 and white pawn at g2. White rook at a1, white queen at d1, white king at e1 and white rook at h1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.