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I have an idea in mind, but at the moment Vajolet needs to be refactored a lot to implemnt it. Probably now I'll have the time to try and implement it. The idea is to do somethingh like multiPV to have the exact value of le'ts say 20 PV. I think that when searching with 100 threads having all them s...

iterative deepening search PV deeper and deeper. the standard way of doing multiPV (to have all the PV at the same depth) is to do multiPV inside iterative deepening, so you search: 1) all the PV at depth 1, 2) all the PV at depth 2, ... .. n) all the PV at depth N this will probably decrease the ef...

sorry but i don't undersand why you compare razoring with probcut. the former work at low depth, the latter at high depth. I suspect that razoring ( do a quiscence search at low depth) is very similar to futility pruning ( at low depth, skip a lot of quiet moves). this is my point of view, but I can...

I'm just off topic, but if you like you can use an extension of gcc and clang using Score = int __attribute__ ((vector_size (16))); // a vector of int of size 16 bytes Score a = {1,2,0,0}; Score b = {5,-6,0,0}; Score res = a + b;// {6,-4,0,0} Score res2 = 2 * a; // {2,4,0,0} it will use simd instruc...

sorry, what do you mean by SHT? Shared transpositio table?

xr_a_y wrote: ↑

Fri Jan 03, 2020 9:36 am

- On another hardware (a dual xeon with 20 cores), single thread perf is 800knps and it scale bad very soon, final perf beging around 23Mnps

what does it means? 28X with 40 cores?
how does it scales another program i.e.stockfish on the dual xeon with 20 cores?

Back on the same subject ... I'm trying to investigate why Minic is slow. .... .... I don't get why SMP Minic is so slow at TCEC ...only 70Mnps on 176 threads, where many others are around 120Mnps I don't have understood if minic is slow or if it's slow only on 176 threads. Depending on this answer...

my time management algorithm is quite simple when pondering. Vajolet starts pondering then as soon as a "ponderhit" is received the standard time management starts and Vajolet allocate time based only on his own time. I do the same when playing in real chess, I ponder on the opponent time, but as so...

I got the best speed with clang

stockfish authors report directly in their code an elo gain of ~60 Elo