rn2k3/5p2/bppp2p1/p2PpqPr/P3N3/P1K3P1/R1P1P2P/2B1QBR1 w q - 1 20
FEN state: rn2k3/5p2/bppp2p1/p2PpqPr/P3N3/P1K3P1/R1P1P2P/2B1QBR1 w q - 1 20 ; Best move: e4d6
The current state of the chess board is: Black rook at a8, black knight at b8 and black king at e8. Black pawn at f7. Black bishop at a6, black pawn at b6, black pawn at c6, black pawn at d6 and black pawn at g6. Black pawn at a5, white pawn at d5, black pawn at e5, black queen at f5, white pawn at g5 and black rook at h5. White pawn at a4 and white knight at e4. White pawn at a3, white king at c3 and white pawn at g3. White rook at a2, white pawn at c2, white pawn at e2 and white pawn at h2. White bishop at c1, white queen at e1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 1. Full move number is 20. White to move.