r1b2k1r/p1pp3p/n4p1n/1p1PpPp1/BP2P1P1/P1NKb2N/2P4P/1R2q2R w - - 0 20
FEN state: r1b2k1r/p1pp3p/n4p1n/1p1PpPp1/BP2P1P1/P1NKb2N/2P4P/1R2q2R w - - 0 20 ; Best move: h1e1
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 a7, black pawn at c7, black pawn at d7 and black pawn at h7. Black knight at a6, black pawn at f6 and black knight at h6. Black pawn at b5, white pawn at d5, black pawn at e5, white pawn at f5 and black pawn at g5. White bishop at a4, white pawn at b4, white pawn at e4 and white pawn at g4. White pawn at a3, white knight at c3, white king at d3, black bishop at e3 and white knight at h3. White pawn at c2 and white pawn at h2. White rook at b1, black queen at e1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. White to move.