r1b2k1r/2pp4/pp1b2qp/5nP1/1n1P1p2/1PP2PPN/P3PN1R/R1BQKB2 b Q - 0 20
FEN state: r1b2k1r/2pp4/pp1b2qp/5nP1/1n1P1p2/1PP2PPN/P3PN1R/R1BQKB2 b Q - 0 20 ; Best move: f4g3
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at c7 and black pawn at d7. Black pawn at a6, black pawn at b6, black bishop at d6, black queen at g6 and black pawn at h6. Black knight at f5 and white pawn at g5. Black knight at b4, white pawn at d4 and black pawn at f4. White pawn at b3, white pawn at c3, white pawn at f3, white pawn at g3 and white knight at h3. White pawn at a2, white pawn at e2, white knight at f2 and white rook at h2. White rook at a1, white bishop at c1, white queen at d1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.