Chess-oriented crossword: BIG and intermediate

Should be easier than the previous one, at least...

Answers so far:

ACROSS: 2.Piece,9.Middlegame,10.Bardeleben,11.Saavedra,12.Grandmaster,15.Ponziani,16.Gens Una Sumus,18.Battery

DOWN: 1.Dufresne,2.Philidor,3.Grunfeld,4.Bilguer,5.Chessboard,6.Fegatello,7.Hypermodern,8.Anderssen,13.mate,14.Nunn,15.Promote,17.Pauly

11 across is eight letters in length.

2 across is piece.  2 down is Philidor.

12 across is grandmaster.

13 down is mate.  15 down is promote.

3 down is Grunfeld.

10 across is Bardeleben.

17 down is Spate.

No...

9A is middle game

10 a is bardeleben

11a is saavedra

6 d fegatello

7d hypermodern

18 across is battery.

1 down is Dufresne.

8 down is anderssen

14 down is nunn

16 across is "Gens una sumus"

15 across is poziani

17 down is Pauly

and that's it

4 down = Bilguer

15 across = Ponziani

5 is chessboard!

this is still to hard