r1b1k1r1/1p5p/6pn/2pQ1pq1/pnPp1b2/PPBPPBPP/5K2/RN4NR w q - 2 20
FEN state: r1b1k1r1/1p5p/6pn/2pQ1pq1/pnPp1b2/PPBPPBPP/5K2/RN4NR w q - 2 20 ; Best move: e3f4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at g8. Black pawn at b7 and black pawn at h7. Black pawn at g6 and black knight at h6. Black pawn at c5, white queen at d5, black pawn at f5 and black queen at g5. Black pawn at a4, black knight at b4, white pawn at c4, black pawn at d4 and black bishop at f4. White pawn at a3, white pawn at b3, white bishop at c3, white pawn at d3, white pawn at e3, white bishop at f3, white pawn at g3 and white pawn at h3. White king at f2. White rook at a1, white knight at b1, 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.