rnb1k1n1/2p3pr/pb2pq1p/1p1p4/P3PP2/N2B1P1P/RPPPNR2/2B1Q1K1 w - - 1 20
FEN state: rnb1k1n1/2p3pr/pb2pq1p/1p1p4/P3PP2/N2B1P1P/RPPPNR2/2B1Q1K1 w - - 1 20 ; Best move: e4e5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black knight at g8. Black pawn at c7, black pawn at g7 and black rook at h7. Black pawn at a6, black bishop at b6, black pawn at e6, black queen at f6 and black pawn at h6. Black pawn at b5 and black pawn at d5. White pawn at a4, white pawn at e4 and white pawn at f4. White knight at a3, white bishop at d3, white pawn at f3 and white pawn at h3. White rook at a2, white pawn at b2, white pawn at c2, white pawn at d2, white knight at e2 and white rook at f2. White bishop at c1, white queen at e1 and white king at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. White to move.