diff --git a/examples/wchess/libwchess/Chessboard.cpp b/examples/wchess/libwchess/Chessboard.cpp
index d32f6681..7b839a77 100644
--- a/examples/wchess/libwchess/Chessboard.cpp
+++ b/examples/wchess/libwchess/Chessboard.cpp
@@ -155,8 +155,8 @@ std::string Chessboard::getRules(const std::string& prompt) const {
     "# leading space is very important!\n"
     "\n";
     if (prompt.empty()) {
-        // result += "move ::= \" \" ((piece | frompos) \" \" \"to \"?)? topos\n";
-        result += "move ::= \" \" frompos \" \" \"to \"? topos\n";
+        result += "move ::= \" \" ((piece | frompos) \" \" \"to \"?)? topos\n";
+        //result += "move ::= \" \" frompos \" \" \"to \"? topos\n";
     }
     else {
         // result += "move ::= prompt \" \" ((piece | frompos) \" \" \"to \"?)? topos\n"
@@ -174,12 +174,12 @@ std::string Chessboard::getRules(const std::string& prompt) const {
         from_pos.insert(positions[m.first]);
         to_pos.insert(positions[m.second]);
     }
-    // if (!pieces.empty()) {
-    //     result += "piece ::= (";
-    //     for (auto& p : pieces) result += " \"" + p + "\" |";
-    //     result.pop_back();
-    //     result += ")\n\n";
-    // }
+    if (!pieces.empty()) {
+        result += "piece ::= (";
+        for (auto& p : pieces) result += " \"" + p + "\" |";
+        result.pop_back();
+        result += ")\n\n";
+    }
     if (!from_pos.empty()) {
         result += "frompos ::= (";
         for (auto& p : from_pos) result += " \"" + p + "\" |";
@@ -711,4 +711,4 @@ bool Chessboard::move(const Move& m) {
     board[m.first] = nullptr;
     board[m.second]->pos = m.second;
     return true;
-}
\ No newline at end of file
+}
diff --git a/examples/wchess/wchess.wasm/index-tmpl.html b/examples/wchess/wchess.wasm/index-tmpl.html
index 45ac834b..7d41b4d3 100644
--- a/examples/wchess/wchess.wasm/index-tmpl.html
+++ b/examples/wchess/wchess.wasm/index-tmpl.html
@@ -188,7 +188,7 @@
                 //     'base-en-q5_1':   57,
                 // };
 
-                let url     = 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en.bin';
+                let url     = 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en-q8_0.bin';
                 let dst     = 'whisper.bin';
                 let size_mb = 75;
 
@@ -272,6 +272,7 @@
                                         let audio = renderedBuffer.getChannelData(0);
 
                                         if (instance) {
+                                            printTextarea('js: number of samples: ' + audio.length);
                                             Module.set_audio(instance, audio);
                                         }
                                     });
@@ -338,7 +339,9 @@
             }
 
             function onStop() {
+                printTextarea('js: stopping recording ...');
                 stopRecording();
+
                 var interval = setInterval(function() {
                     var moves = Module.get_moves();
 
diff --git a/examples/wchess/wchess.wasm/wchess.wasm.cpp b/examples/wchess/wchess.wasm/wchess.wasm.cpp
index 2a8ee917..30c9cca4 100644
--- a/examples/wchess/wchess.wasm/wchess.wasm.cpp
+++ b/examples/wchess/wchess.wasm/wchess.wasm.cpp
@@ -55,19 +55,21 @@ void wchess_main(size_t i) {
     wparams.print_progress   = false;
     wparams.print_timestamps = true;
     wparams.print_special    = false;
+    wparams.no_timestamps    = true;
 
     wparams.max_tokens       = 32;
-    // wparams.audio_ctx        = 768; // partial encoder context for better performance
+    wparams.audio_ctx        = 768; // partial encoder context for better performance
 
-    wparams.temperature     = 0.4f;
-    wparams.temperature_inc = 1.0f;
+    wparams.temperature     = 0.0f;
+    wparams.temperature_inc = 2.0f;
     wparams.greedy.best_of  = 1;
 
-    wparams.beam_search.beam_size = 5;
+    wparams.beam_search.beam_size = 1;
 
     wparams.language         = "en";
 
     wparams.grammar_penalty = 100.0;
+    wparams.initial_prompt = "bishop to c3, rook to d4, knight to e5, d4 d5, knight to c3, c3, queen to d4, king b1, pawn to a1, bishop to b2, knight to c3,";
 
     printf("command: using %d threads\n", wparams.n_threads);