rnb3qr/1pp1bk1p/6p1/p2ppp2/1PB1PPnP/N4N2/P1PP4/R1B1K1R1 w - - 0 20
FEN state: rnb3qr/1pp1bk1p/6p1/p2ppp2/1PB1PPnP/N4N2/P1PP4/R1B1K1R1 w - - 0 20 ; Best move: e4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at g8 and black rook at h8. Black pawn at b7, black pawn at c7, black bishop at e7, black king at f7 and black pawn at h7. Black pawn at g6. Black pawn at a5, black pawn at d5, black pawn at e5 and black pawn at f5. White pawn at b4, white bishop at c4, white pawn at e4, white pawn at f4, black knight at g4 and white pawn at h4. White knight at a3 and white knight at f3. White pawn at a2, white pawn at c2 and white pawn at d2. White rook at a1, white bishop at c1, white king at e1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. White to move.