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Update NNUE architecture to SFNNv14 and net nn-7bf13f9655c8.nnue

Browse Source 
[STC](https://tests.stockfishchess.org/tests/live_elo/69cb991bc025c305b7daa219)

LLR: 2.97 (-2.94,2.94) <0.00,2.00>
Total: 47520 W: 12558 L: 12219 D: 22743
Ptnml(0-2): 190, 5474, 12102, 5795, 199

[LTC](https://tests.stockfishchess.org/tests/live_elo/69cc6b42731dfb72d2e92128)

LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 123756 W: 31996 L: 31497 D: 60263
Ptnml(0-2): 81, 13512, 34221, 13955, 109

Adds features for pawns pushing against other pawns. For indexing, we
use the existing threats feature set by adding the forward square to the
squares threatened by a pawn. This threat is only enabled when another
pawn occupies that square. We then add appropriate logic changes in
`update_piece_threats` and `features/full_threats.cpp`.

The wonderful Ciekce (of Stormphrax) and peregrine (of Reckless) also
had similar ideas with adding forward pawn movements to TI, and I
appreciate their giving me motivation to figure out `nnue-pytorch` and
test it.

closes https://github.com/official-stockfish/Stockfish/pull/6694

Bench: 2926703
This commit is contained in:
anematode
2026-04-02 20:32:43 +02:00
committed by Disservin
parent 8a1b0f8b04
commit 5eeca7392e
5 changed files with 55 additions and 7 deletions
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src/position.cpp
+19 -2
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@@ -1265,8 +1265,25 @@ void Position::update_piece_threats(Piece pc,
Bitboard threatened = attacks_bb(pc, s, occupied) & occupiedNoK;
Bitboard incoming_threats =
(PseudoAttacks[KNIGHT][s] & knights) | (attacks_bb<PAWN>(s, WHITE) & blackPawns)
| (attacks_bb<PAWN>(s, BLACK) & whitePawns) | (PseudoAttacks[KING][s] & kings);
(PseudoAttacks[KNIGHT][s] & knights) | (PseudoAttacks[KING][s] & kings);
// Compute both incoming and outgoing pawn threats. Incoming pawn pushers are only
// added if 'pc' is a pawn.
if (type_of(pc) == PAWN)
{
Bitboard whiteAttacks = PawnPushOrAttacks[WHITE][s];
Bitboard blackAttacks = PawnPushOrAttacks[BLACK][s];
threatened |= (color_of(pc) == WHITE ? whiteAttacks : blackAttacks) & pieces(PAWN);
incoming_threats |= whiteAttacks & blackPawns;
incoming_threats |= blackAttacks & whitePawns;
}
else
{
incoming_threats |=
(attacks_bb<PAWN>(s, WHITE) & blackPawns) | (attacks_bb<PAWN>(s, BLACK) & whitePawns);
}
#ifdef USE_AVX512ICL
if constexpr (PutPiece)