This test set is composed of 6 files:
1) culls.epd Culls are problems which are from another problem, farther towards the end of a PV (so they are already in the set)
2) culls-ana.epd Culls-ana is the culls problem set with analysis

While the culls files are redundant, they are still interesting ...

1B1nR3/3P2k1/4p3/r3pp1K/2p5/8/8/8 w - - acd 73; bm Bc7; ce 32696; c5 "1"; c7 "Thèmes 64#4369;1984;W:Hlinka=M;(+0413.14h5g7);1-0;1984"; c8 "pv Bc7 Rd5 Re7+ Nf7 Bxe5+ Kg8 Bf6 Rd1 Kg6 Rg1+ Bg5 Rxg5+ Kf6 Rg7 Re8+ Kh7 Rf8 c3 Rxf7 Rxf7+ Kxf7 c2 d8=Q c1=Q Qg8+ Kh6 Qg6# 1-0"; c9 "HHdbVI.0766047.001a.36605 ...

1B1nR3/3P2k1/4p3/r3pp1K/2p5/8/8/8 w - - bm Bc7; id "POW.01";
1B4bk/p4n1p/6pP/3p4/7p/3Pp2P/1p2P1K1/bB6 w - - bm Bh2; id "POW.02";
1k4N1/2p5/1BP4K/8/r7/8/pn4Qp/7r w - - bm Nf6; id "POW.03";
1N6/B2p1p1p/3P1P1P/2K5/pP6/p3p3/rpp1P2P/qkn4R w - - bm Nc6; id "POW.04";
1nq2r1k/p4ppp/P7/1p2R3/7n/1P2p2P ...

Do you use bitboard or some kind of array representation? If you use bitboard, you might look at Olithink. His evaluation mostly relies on mobility.

Building a repertoire using computers is a difficult problem.
You could, of course, go by popularity. But those are the openings which have already been studied to death.
You could go for novelty, but everyone gets bored of novelty eventually and novelty is usually novel for a reason - those ...

https://www.engine-chess.com/viewforum.php?f=11

That was my one objection about using that forum.

Both engines suffer from the Stockfish "Freeze on a big fail high" where it will not out put anything, even when the flag falls, after a massive fail high.
This is only a problem with extremely difficult checkmate positions.
For your average tactical position or checkmate of medium difficulty, they ...

You are the only one on the web that I can find saying that.
1) Have you got both cards running in a different GUI?
>>
They both run in arena with LC0 0.26 and LC0 0.27
<<
2) Have you got both cards running with an earlier Lc0?
>>
See above
<<
Sorry, my main point ended up in 3) below.
It is if you ...

It works for me with 1 GPU, but I have two of them.

I tried your setting multi_stream=true,(backend=cuda-fp16,gpu=0),(backend=cuda-fp16,gpu=1)
And I get no errors on startup. I also get no output. This is the log:

2021-09-05 12:52:54.049-->1:stop
2021-09-05 12:52:55.885**----------New game---2021 ...

Another forum worthy of a look-see is:
http://www.engine-chess.com/
It looks capable, but unfortunately it is http instead of https.