rnbqkb1r/p4npp/B2pp3/2p2P2/p2P1P2/NP2PN1P/2P5/1RBQ2KR w - - 5 20
FEN state: rnbqkb1r/p4npp/B2pp3/2p2P2/p2P1P2/NP2PN1P/2P5/1RBQ2KR w - - 5 20 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black knight at f7, black pawn at g7 and black pawn at h7. White bishop at a6, black pawn at d6 and black pawn at e6. Black pawn at c5 and white pawn at f5. Black pawn at a4, white pawn at d4 and white pawn at f4. White knight at a3, white pawn at b3, white pawn at e3, white knight at f3 and white pawn at h3. White pawn at c2. White rook at b1, white bishop at c1, white queen at d1, white king at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 5. Full move number is 20. White to move.