r1b1k3/pp3pbr/3p2p1/P1p1pPPp/3PP3/BPPn4/4B3/RN1Q1KNR w q - 2 20
FEN state: r1b1k3/pp3pbr/3p2p1/P1p1pPPp/3PP3/BPPn4/4B3/RN1Q1KNR w q - 2 20 ; Best move: d1d3
The current state of the chess board is: Black rook at a8, black bishop at c8 and black king at e8. Black pawn at a7, black pawn at b7, black pawn at f7, black bishop at g7 and black rook at h7. Black pawn at d6 and black pawn at g6. White pawn at a5, black pawn at c5, black pawn at e5, white pawn at f5, white pawn at g5 and black pawn at h5. White pawn at d4 and white pawn at e4. White bishop at a3, white pawn at b3, white pawn at c3 and black knight at d3. White bishop at e2. White rook at a1, white knight at b1, white queen at d1, white king at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 20. White to move.