how to improve endgame play?

[Whiskers]

turned out after i made all the changes and pitted them against the old version (from about a week ago), it was actually a regression Trying again...

[hgm]

What always served me well for programs at this level was looking at the games. To see what they actually did wrong to turn a drawn situation into a loss, or aspect of the position they overlooked so that they believed a lost position was a draw.

[Whiskers]

What always served me well for programs at this level was looking at the games. To see what they actually did wrong to turn a drawn situation into a loss, or aspect of the position they overlooked so that they believed a lost position was a draw.

I traced it to razoring, my quiescent search is minimal and doesn't bother analyzing quiet checks or losing captures, which explains why it missed Bf7+ in this game (I wondered about this for a while because other than that I don't ever reduce checks except with razoring):
[pgn]1. e4 e5 2. f4 exf4 3. Nf3 Ne7 4. d4 d5 5. Bxf4 dxe4 6. Ne5 Nd5 7. Bc4 Nxf4 8.
O-O Ne6 9. c3 f6 10. Qh5+ g6 11. Nxg6 Ng7 12. Bf7+ Kxf7 13. Ne5+ Ke6 14. Qf7+
Kd6 15. Rxf6+ Qxf6 16. Qxf6+ Ne6 1-0[/pgn]