TalkChess.com

see also ... https://www.chessprogramming.org/Bitboard_Serialization#Scanning_with_Reset A win of abstraction is to use a combined bitscan with reset found bit routine. This is fine. But probably harder for compilers to generate optimal code in the if-do-while-sense, where reset last bit already set...

Hi crem and all others interested to contribute,
unfortunately CPW seems to have no way to register yourself or to demand registration - please send me a pm with suggested user name, and e-mail, then I will create an account.

Thanks & Best regards,
Gerd

Is this faster than your fixed shift approach introduced one year ago?

http://www.talkchess.com/forum3/viewtopic.php?t=66538

Guess you mean expansion strategy ... using the UCB1 formula, see
https://www.youtube.com/watch?v=UXW2yZndl7U

Yes, 128-bit xmm registers with SSE may be treated as vector of four floats or two doubles, as well since SSE2 as integer vectors of 16 bytes, eight words, four double words or two quad words. AVX or AVX2 two times more. There are 8 of these SIMD-registers in 32-bit mode, and 16 in 64-bit mode. http...

Good luck with CCR, you may try using 256-bit ymm register of x86 AVX2 for one register boards, to make/unmake by board ^= tbl[enumMove] ;-) related cpw stuff: https://www.chessprogramming.org/Nibble#ArrayOfNibbles CCR with "vertical" nibbles: https://www.chessprogramming.org/Quad-Bitboards https://...

Conversion and revisiting, replacing links etc. takes some time - most of the programming stuff is done. I still have a job and a bike ...

Hi Edsel,

with magic or pext bitboards, most use "On the Fly" generation ...

For some references see
https://www.chessprogramming.org/Attack_and_Defend_Maps

Good luck,
Gerd

I have noticed the announcement that Wikispaces, which is hosting the Chess Programming Wiki, is shutting down ( http://blog.wikispaces.com/ ). I hope there are plans to migrate the content elsewhere, because it has been a good resource and reference. --Jon We have wikitext backups, and some months...

The naive disjunctiv normal form approach would be, with some subexpressions to optimize oneEmptyNeighbor = ( occupied_shift_left & ~occupied_shift_down & ~occupied_shift_right & ~occupied_shift_up) | (~occupied_shift_left & occupied_shift_down & ~occupied_shift_right & ~occupied_shift_up) | (~occup...