r1q1k2r/p1p4p/3p2nb/NpB3p1/1Pn2pP1/P2PP1Nb/2P1Q2P/2KR1BR1 w kq - 0 20
FEN state: r1q1k2r/p1p4p/3p2nb/NpB3p1/1Pn2pP1/P2PP1Nb/2P1Q2P/2KR1BR1 w kq - 0 20 ; Best move: f1h3
The current state of the chess board is: Black rook at a8, black queen at c8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at h7. Black pawn at d6, black knight at g6 and black bishop at h6. White knight at a5, black pawn at b5, white bishop at c5 and black pawn at g5. White pawn at b4, black knight at c4, black pawn at f4 and white pawn at g4. White pawn at a3, white pawn at d3, white pawn at e3, white knight at g3 and black bishop at h3. White pawn at c2, white queen at e2 and white pawn at h2. White king at c1, white rook at d1, white bishop at f1 and white rook at g1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 20. White to move.