From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Sun, 2 Apr 2023 15:45:03 +0000 (+0200)
Subject: Support Sort of Almost Chess
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=974eadd0f7d7fdde0d6e86034318e5185a15b120;p=fairystockfish.git

Support Sort of Almost Chess
---

diff --git a/src/variant.cpp b/src/variant.cpp
index 58c2aa2..8196915 100644
--- a/src/variant.cpp
+++ b/src/variant.cpp
@@ -965,6 +965,18 @@ namespace {
         v->promotionPieceTypes[BLACK] = piece_set(CHANCELLOR) | ROOK | BISHOP | KNIGHT;
         return v;
     }
+    // Sort of almost chess
+    // One queen is replaced by a chancellor
+    // https://en.wikipedia.org/wiki/Almost_chess#Sort_of_almost_chess
+    Variant* sortofalmost_variant() {
+        Variant* v = chess_variant();
+        v->pieceToCharTable = "PNBRQ...........CKpnbrq...........ck";
+        v->add_piece(CHANCELLOR, 'c');
+        v->startFen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBCKBNR w KQkq - 0 1";
+        v->promotionPieceTypes[WHITE] = piece_set(CHANCELLOR) | ROOK | BISHOP | KNIGHT;
+        v->promotionPieceTypes[BLACK] = piece_set(QUEEN) | ROOK | BISHOP | KNIGHT;
+        return v;
+    }
     // Chigorin chess
     // Asymmetric variant with knight vs. bishop movements
     // https://www.chessvariants.com/diffsetup.dir/chigorin.html
@@ -1807,6 +1819,7 @@ void VariantMap::init() {
     add("losalamos", losalamos_variant());
     add("gardner", gardner_variant());
     add("almost", almost_variant());
+    add("sortofalmost", sortofalmost_variant());
     add("chigorin", chigorin_variant());
     add("perfect", perfect_variant());
     add("spartan", spartan_variant());
diff --git a/tests/perft.sh b/tests/perft.sh
index 92d6ebb..8111ee7 100755
--- a/tests/perft.sh
+++ b/tests/perft.sh
@@ -60,7 +60,12 @@ if [[ $1 == "all" || $1 == "variant" ]]; then
   expect perft.exp sittuyin "fen 2r5/6k1/6p1/3s2P1/3npR2/8/p2N2F1/3K4[] w - - 1 50" 4 373984 > /dev/null
   expect perft.exp sittuyin "fen 8/6s1/5P2/3n4/pR2K2S/1P6/1k4p1/8[] w - - 1 50" 4 268869 > /dev/null
   expect perft.exp sittuyin "fen 1k5K/3r2P1/8/8/8/8/8/8[] w - - 0 1" 5 68662 > /dev/null
-  expect perft.exp chigorin "fen 8/7P/2k5/8/8/5K2/p7/8 w - - 0 1" 2 120 > /dev/null
+  expect perft.exp almost startpos 3 11895 > /dev/null
+  expect perft.exp almost "fen 8/1k5P/8/8/8/3K4/p7/8 b - - 0 1" 2 140 > /dev/null
+  expect perft.exp sortofalmost startpos 3 10815 > /dev/null
+  expect perft.exp sortofalmost "fen 8/1k5P/8/8/8/3K4/p7/8 b - - 0 1" 2 139 > /dev/null
+  expect perft.exp chigorin startpos 3 11408 > /dev/null
+  expect perft.exp chigorin "fen 8/1k5P/8/8/8/3K4/p7/8 b - - 0 1" 2 117 > /dev/null
   expect perft.exp perfect startpos 3 15082 > /dev/null
   expect perft.exp perfect "fen c3k2r/pppppppp/8/8/8/8/PPPPPPPP/C3K2R w KQkq - 0 1" 3 17500 > /dev/null
   expect perft.exp spartan startpos 3 14244 > /dev/null