Add fairymax chess engine

pkgs/games/fairymax/default.nix

@@ -0,0 +1,40 @@
+{stdenv, fetchurl}:
+stdenv.mkDerivation rec {
+  name = "fairymax-${version}";
+  version = "4.8";
+  src = fetchurl {
+    url = "http://home.hccnet.nl/h.g.muller/fmax4_8w.c";
+    sha256 = "01vxhpa4z0613mkgkzmsln293wxmyp5kdzil93cd1ik51q4gwjca";
+  };
+  ini = fetchurl {
+    url = "http://home.hccnet.nl/h.g.muller/fmax.ini";
+    sha256 = "1zwx70g3gspbqx1zf9gm1may8jrli9idalvskxbdg33qgjys47cn";
+  };
+  unpackPhase = ''
+    cp ${src} fairymax.c
+    cp ${ini} fmax.ini
+  '';
+  buildPhase = ''
+    gcc *.c -o fairymax -DINI_FILE='"'"$out/share/fairymax/fmax.ini"'"'
+  '';
+  installPhase = ''
+    mkdir -p "$out"/{bin,share/fairymax}
+    cp fairymax "$out/bin"
+    cp fmax.ini "$out/share/fairymax"
+  '';
+  meta = {
+    inherit version;
+    description = ''A small chess engine supporting fairy pieces'';
+    longDescription = ''
+       A version of micro-Max that reads the piece description
+       from a file fmax.ini, so that arbitrary fairy pieces can be
+       implemented. This version (4.8J) supports up to 15 piece types,
+       and board sizes upto 12x8 board. A Linux port exists in the
+       format of a debian package.
+    '';
+    license = stdenv.lib.licenses.free ;
+    maintainers = [stdenv.lib.maintainers.raskin];
+    platforms = stdenv.lib.platforms.linux;
+    homepage = "http://home.hccnet.nl/h.g.muller/dwnldpage.html";
+  };
+}

pkgs/top-level/all-packages.nix

@@ -11232,6 +11232,8 @@ let
 
   exult = callPackage ../games/exult { };
 
+  fairymax = callPackage ../games/fairymax {};
+
   flightgear = callPackage ../games/flightgear { };
 
   freeciv = callPackage ../games/freeciv { };