Install -D -m644 sf-211-book/Book.bin $pkgdir/usr/share/$pkgname/book. Unzip -o "stockfish-$_bookver-book.zip" || return 1 Unzip -o "stockfish-$pkgver-linux.zip" || return 1
Pkgdesc="A strong chess engine written by Tord Romstad, Marco Costalba, Joona Kiiski" So there seems to be an issue with the test. Which causes my architecture to be correctly identified as x86-64. According to the blog announcement, this new version 'plays significantly stronger than any of its predecessors', typically winning ten times more game pairs than it loses when matched against version eleven. I can work around the problem by commenting out 2 lines in PKGBUILD: 30 # elif grep -q popcnt /proc/cpuinfo then On 2 September 2020, the twelfth version of Stockfish was released, incorporating the aforementioned neural network improvement. This causes stockfish to crash in smmintrin.h: 281│ extern _inline _m128i _attribute_((_gnu_inline_, _always_inline_, _artificial_))Ģ82│ _mm_max_epi8 (_m128i _X, _m128i _Y)Ģ84├─> return (_m128i) _builtin_ia32_pmaxsb128 ((_v16qi)_X, (_v16qi)_Y) This game was played with a long time control (90 minutes + 10 second increment) and Stockfish had analysed to approximately. When I build using makepkg, PKGBUILD incorrectly identifies my architecture as x86-64-modern.
Spectre v2: Mitigation Full AMD retpoline, STIBP disabled, RSB filling Spectre v1: Mitigation usercopy/swapgs barriers and _user pointer sanitization Model name: AMD A8-3820 APU with Radeon(tm) HD Graphicsįlags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc cpuid extd_apiĬid pni cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate vmmcall arat npt lbrv svm_lock nrip_save pausefilter Stockfish can use up to 512 CPU threads in multiprocessor systems.Hello, I have an older AMD processor: Architecture: x86_64Īddress sizes: 40 bits physical, 48 bits virtual This might be directly linked on how that stockfish binary is written, (multi threadings), and not a php behavior, but I am looking for an explanation here? file_put_contents(".COMFISH","uci\nucinewgame\nsetoption name Threads value 1\nposition fen rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1\ngo depth 50") (See below for three sample games from this match with analysis by Stockfish 10 and video analysis by GM Robert Hess.).
The updated AlphaZero crushed Stockfish 8 in a new 1,000-game match, scoring +155 -6 839. I tried many options and different ways to run shell commands from php, including posix_mkfifo() piping, but none are working as expected, always returning a move at depth 1.Īnother example, same behavior, return always "a2a3". The results leave no question, once again, that AlphaZero plays some of the strongest chess in the world. $process = proc_open("stockfish", $descr, $pipes) įwrite($pipes, "position fen rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1\n") Īll versions of stockfish had been tested, 8, 9, 10, with the same result. It is identical with any FEN positions, always returning the depth 1. The answer is instantaneous, where going trough all the depth levels should take at least many seconds. There is an unexpected behavior, the stockfish program is quitting directly without "thinking", it returns only the position at depth 1, when called from php.įor better understanding, while running the stockfish program from the command line, here is the expected behavior (gif):įrom php, the following is working ( starting position, whites to play, asking for 50 depth), it returns a move a2a3, the position at depth 1, which is a pretty bad move! In our testing, Stockfish 15 is ahead of Stockfish 14 by 36 Elo points and wins nine times more game pairs than it loses 1. Looking forward to integrate stockfish chess engine into a php-cli script. A new major release of Stockfish is now available at Stockfish 15 continues to push the boundaries of chess, providing unrivalled analysis and playing strength.