Switch to Stockfish 16 (#41)

As this plugin is used by mobile devices, SF16 is a good trade-off
considering its network file size (38M) which is significantly smaller
than the next one (SF16.1: 62M).

CHANGELOG.md

@@ -43,3 +43,7 @@
 ## [1.5.0] - 17 April 2024
 
 * Update to Stockfish 16.1
+
+## [1.6.0] - 18 April 2024
+
+* Switch to Stockfish 16 for smaller app size

README.md

@@ -17,7 +17,7 @@ iOS project must have `IPHONEOS_DEPLOYMENT_TARGET` >=12.0.
 Update `dependencies` section inside `pubspec.yaml`:
 
 ```yaml
-  stockfish: ^1.5.0
+  stockfish: ^1.6.0
 ```
 
 ### Init engine

android/CMakeLists.txt

@@ -9,10 +9,17 @@ add_library(
 )
 
 if(ANDROID_ABI STREQUAL arm64-v8a)
-  target_compile_options(stockfish PRIVATE -DUSE_PTHREADS -DNDEBUG -O3 -DIS_64BIT -DUSE_POPCNT -DUSE_NEON=8)
+  if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+    target_compile_options(stockfish PRIVATE -DUSE_PTHREADS -DIS_64BIT -DUSE_POPCNT -DUSE_NEON=8)
+  else()
+    target_compile_options(stockfish PRIVATE -fno-exceptions -DUSE_PTHREADS -DNDEBUG -O3 -DIS_64BIT -DUSE_POPCNT -DUSE_NEON=8)
+  endif()
 else()
-  target_compile_options(stockfish PRIVATE -DUSE_PTHREADS -DNDEBUG -O3)
+  if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+    target_compile_options(stockfish PRIVATE -DUSE_PTHREADS)
+  else()
+    target_compile_options(stockfish PRIVATE -fno-exceptions -DUSE_PTHREADS -DNDEBUG -O3)
+  endif()
 endif()
 
-file(DOWNLOAD https://tests.stockfishchess.org/api/nn/nn-b1a57edbea57.nnue ${CMAKE_BINARY_DIR}/nn-b1a57edbea57.nnue)
-file(DOWNLOAD https://tests.stockfishchess.org/api/nn/nn-baff1ede1f90.nnue ${CMAKE_BINARY_DIR}/nn-baff1ede1f90.nnue)
+file(DOWNLOAD https://tests.stockfishchess.org/api/nn/nn-5af11540bbfe.nnue ${CMAKE_BINARY_DIR}/nn-5af11540bbfe.nnue)

example/ios/Podfile.lock

@@ -2,7 +2,7 @@ PODS:
   - Flutter (1.0.0)
   - integration_test (0.0.1):
     - Flutter
-  - stockfish (1.5.0):
+  - stockfish (1.6.0):
     - Flutter
 
 DEPENDENCIES:
@@ -21,7 +21,7 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   Flutter: e0871f40cf51350855a761d2e70bf5af5b9b5de7
   integration_test: ce0a3ffa1de96d1a89ca0ac26fca7ea18a749ef4
-  stockfish: 819bf4544d1e76a01da13af56324c69b3bf7928f
+  stockfish: 1cee686b12e2541a977d062746d2eb3f794d891c
 
 PODFILE CHECKSUM: c4c93c5f6502fe2754f48404d3594bf779584011
 

example/pubspec.lock

@@ -213,7 +213,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "1.5.0"
+    version: "1.6.0"
   stream_channel:
     dependency: transitive
     description:

ios/FlutterStockfish/ffi.cpp

@@ -1,14 +1,15 @@
 #include <iostream>
-#include <unordered_map>
 #include <stdio.h>
 #include <unistd.h>
 
 #include "../Stockfish/src/bitboard.h"
-#include "../Stockfish/src/evaluate.h"
-#include "../Stockfish/src/misc.h"
+#include "../Stockfish/src/endgame.h"
 #include "../Stockfish/src/position.h"
-#include "../Stockfish/src/tune.h"
-#include "../Stockfish/src/types.h"
+#include "../Stockfish/src/psqt.h"
+#include "../Stockfish/src/search.h"
+#include "../Stockfish/src/syzygy/tbprobe.h"
+#include "../Stockfish/src/thread.h"
+#include "../Stockfish/src/tt.h"
 #include "../Stockfish/src/uci.h"
 
 #include "ffi.h"

ios/Stockfish/AUTHORS

@@ -12,7 +12,6 @@ Hisayori Noda (nodchip)
 # All other authors of Stockfish code (in alphabetical order)
 Aditya (absimaldata)
 Adrian Petrescu (apetresc)
-Ahmed Kerimov (wcdbmv)
 Ajith Chandy Jose (ajithcj)
 Alain Savard (Rocky640)
 Alayan Feh (Alayan-stk-2)
@@ -30,7 +29,6 @@ Aram Tumanian (atumanian)
 Arjun Temurnikar
 Artem Solopiy (EntityFX)
 Auguste Pop
-Balazs Szilagyi
 Balint Pfliegel
 Ben Chaney (Chaneybenjamini)
 Ben Koshy (BKSpurgeon)
@@ -47,12 +45,9 @@ candirufish
 Chess13234
 Chris Cain (ceebo)
 clefrks
-Clemens L. (rn5f107s2)
-Cody Ho (aesrentai)
 Dale Weiler (graphitemaster)
 Daniel Axtens (daxtens)
 Daniel Dugovic (ddugovic)
-Daniel Monroe (Ergodice)
 Dan Schmidt (dfannius)
 Dariusz Orzechowski (dorzechowski)
 David (dav1312)
@@ -74,11 +69,9 @@ Fabian Beuke (madnight)
 Fabian Fichter (ianfab)
 Fanael Linithien (Fanael)
 fanon
-Fauzi Akram Dabat (fauzi2)
+Fauzi Akram Dabat (FauziAkram)
 Felix Wittmann
 gamander
-Gabriele Lombardo (gabe)
-Gahtan Nahdi
 Gary Heckman (gheckman)
 George Sobala (gsobala)
 gguliash
@@ -101,7 +94,6 @@ Jake Senne (w1wwwwww)
 Jan Ondruš (hxim)
 Jared Kish (Kurtbusch, kurt22i)
 Jarrod Torriero (DU-jdto)
-Jasper Shovelton (Beanie496)
 Jean-Francois Romang (jromang)
 Jean Gauthier (OuaisBla)
 Jekaa
@@ -186,7 +178,6 @@ Raminder Singh
 renouve
 Reuven Peleg (R-Peleg)
 Richard Lloyd (Richard-Lloyd)
-Robert Nürnberg (robertnurnberg)
 Rodrigo Exterckötter Tjäder
 Rodrigo Roim (roim)
 Ronald de Man (syzygy1, syzygy)
@@ -210,15 +201,10 @@ Stefano Cardanobile (Stefano80)
 Stefano Di Martino (StefanoD)
 Steinar Gunderson (sesse)
 Stéphane Nicolet (snicolet)
-Stephen Touset (stouset)
 Syine Mineta (MinetaS)
-Taras Vuk (TarasVuk)
 Thanar2
 thaspel
 theo77186
-TierynnB
-Ting-Hsuan Huang (fffelix-huang)
-Tobias Steinmann
 Tomasz Sobczyk (Sopel97)
 Tom Truscott
 Tom Vijlbrief (tomtor)
@@ -232,10 +218,9 @@ Vince Negri (cuddlestmonkey)
 Viren
 windfishballad
 xefoci7612
-Xiang Wang (KatyushaScarlet)
 zz4032
 
 # Additionally, we acknowledge the authors and maintainers of fishtest,
 # an amazing and essential framework for Stockfish development!
 #
-# https://github.com/official-stockfish/fishtest/blob/master/AUTHORS
+# https://github.com/glinscott/fishtest/blob/master/AUTHORS

ios/Stockfish/Copying.txt

@@ -1,7 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +645,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +664,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
+<http://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

ios/Stockfish/README.md

@@ -59,9 +59,38 @@ This distribution of Stockfish consists of the following files:
   * a file with the .nnue extension, storing the neural network for the NNUE
     evaluation. Binary distributions will have this file embedded.
 
-## Contributing
+## The UCI protocol
+
+The [Universal Chess Interface][uci-link] (UCI) is a standard text-based protocol
+used to communicate with a chess engine and is the recommended way to do so for
+typical graphical user interfaces (GUI) or chess tools. Stockfish implements the
+majority of its options.
+
+Developers can see the default values for the UCI options available in Stockfish
+by typing `./stockfish uci` in a terminal, but most users should typically use a
+chess GUI to interact with Stockfish.
+
+For more information on UCI or debug commands, see our [documentation][wiki-commands-link].
+
+## Compiling Stockfish
 
-__See [Contributing Guide](CONTRIBUTING.md).__
+Stockfish has support for 32 or 64-bit CPUs, certain hardware instructions,
+big-endian machines such as Power PC, and other platforms.
+
+On Unix-like systems, it should be easy to compile Stockfish directly from the
+source code with the included Makefile in the folder `src`. In general, it is
+recommended to run `make help` to see a list of make targets with corresponding
+descriptions.
+
+```
+cd src
+make -j build ARCH=x86-64-modern
+```
+
+Detailed compilation instructions for all platforms can be found in our
+[documentation][wiki-compile-link].
+
+## Contributing
 
 ### Donating hardware
 
@@ -85,25 +114,6 @@ Discussions about Stockfish take place these days mainly in the Stockfish
 [Discord server][discord-link]. This is also the best place to ask questions
 about the codebase and how to improve it.
 
-## Compiling Stockfish
-
-Stockfish has support for 32 or 64-bit CPUs, certain hardware instructions,
-big-endian machines such as Power PC, and other platforms.
-
-On Unix-like systems, it should be easy to compile Stockfish directly from the
-source code with the included Makefile in the folder `src`. In general, it is
-recommended to run `make help` to see a list of make targets with corresponding
-descriptions. An example suitable for most Intel and AMD chips:
-
-```
-cd src
-make -j profile-build ARCH=x86-64-avx2
-```
-
-Detailed compilation instructions for all platforms can be found in our
-[documentation][wiki-compile-link]. Our wiki also has information about
-the [UCI commands][wiki-uci-link] supported by Stockfish.
-
 ## Terms of use
 
 Stockfish is free and distributed under the
@@ -128,7 +138,7 @@ also be made available under GPL v3.
 [issue-link]:         https://github.com/official-stockfish/Stockfish/issues/new?assignees=&labels=&template=BUG-REPORT.yml
 [discussions-link]:   https://github.com/official-stockfish/Stockfish/discussions/new
 [fishtest-link]:      https://tests.stockfishchess.org/tests
-[guideline-link]:     https://github.com/official-stockfish/fishtest/wiki/Creating-my-first-test
+[guideline-link]:     https://github.com/glinscott/fishtest/wiki/Creating-my-first-test
 [license-link]:       https://github.com/official-stockfish/Stockfish/blob/master/Copying.txt
 [programming-link]:   https://www.chessprogramming.org/Main_Page
 [programmingsf-link]: https://www.chessprogramming.org/Stockfish
@@ -140,10 +150,10 @@ also be made available under GPL v3.
 [website-link]:       https://stockfishchess.org
 [website-blog-link]:  https://stockfishchess.org/blog/
 [wiki-link]:          https://github.com/official-stockfish/Stockfish/wiki
-[wiki-compile-link]:  https://github.com/official-stockfish/Stockfish/wiki/Compiling-from-source
-[wiki-uci-link]:      https://github.com/official-stockfish/Stockfish/wiki/UCI-&-Commands
 [wiki-usage-link]:    https://github.com/official-stockfish/Stockfish/wiki/Download-and-usage
-[worker-link]:        https://github.com/official-stockfish/fishtest/wiki/Running-the-worker
+[wiki-compile-link]:  https://github.com/official-stockfish/Stockfish/wiki/Compiling-from-source
+[wiki-commands-link]: https://github.com/official-stockfish/Stockfish/wiki/Commands
+[worker-link]:        https://github.com/glinscott/fishtest/wiki/Running-the-worker
 
 [build-badge]:        https://img.shields.io/github/actions/workflow/status/official-stockfish/Stockfish/stockfish.yml?branch=master&style=for-the-badge&label=stockfish&logo=github
 [commits-badge]:      https://img.shields.io/github/commits-since/official-stockfish/Stockfish/latest?style=for-the-badge