r1q1k1n1/2p1p1br/4PP1p/Np4p1/1Pp4P/Pn6/3PNP2/R1BQKB1R w KQ - 0 20
FEN state: r1q1k1n1/2p1p1br/4PP1p/Np4p1/1Pp4P/Pn6/3PNP2/R1BQKB1R w KQ - 0 20 ; Best move: a5b3
The current state of the chess board is: Black rook at a8, black queen at c8, black king at e8 and black knight at g8. Black pawn at c7, black pawn at e7, black bishop at g7 and black rook at h7. White pawn at e6, white pawn at f6 and black pawn at h6. White knight at a5, black pawn at b5 and black pawn at g5. White pawn at b4, black pawn at c4 and white pawn at h4. White pawn at a3 and black knight at b3. White pawn at d2, white knight at e2 and white pawn at f2. White rook at a1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 0. Full move number is 20. White to move.