r1b1kb1r/p1p1n2p/5BN1/1p1q1p2/3n3P/1PpBP3/P2P1KP1/RNQ4R w kq - 0 20
FEN state: r1b1kb1r/p1p1n2p/5BN1/1p1q1p2/3n3P/1PpBP3/P2P1KP1/RNQ4R w kq - 0 20 ; Best move: b1c3
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at c7, black knight at e7 and black pawn at h7. White bishop at f6 and white knight at g6. Black pawn at b5, black queen at d5 and black pawn at f5. Black knight at d4 and white pawn at h4. White pawn at b3, black pawn at c3, white bishop at d3 and white pawn at e3. White pawn at a2, white pawn at d2, white king at f2 and white pawn at g2. White rook at a1, white knight at b1, white queen at c1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 20. White to move.