server side analysis now using sf 12 nnue

app/views/plan/features.scala

@@ -43,10 +43,10 @@ object features {
               a(href := routes.Page.variantHome())("8 chess variants (Crazyhouse, Chess960, Horde, ...)")
             ),
             tr(custom("30 per day"))(
-              s"Deep $engineName server analysis"
+              "Deep Stockfish 12+ server analysis"
             ),
             tr(unlimited)(
-              s"Instant local $engineName analysis"
+              "Instant local Stockfish 11+ analysis"
             ),
             tr(unlimited)(
               a(href := "https://lichess.org/blog/WN-gLzAAAKlI89Xn/thousands-of-stockfish-analysers")(
@@ -125,7 +125,7 @@ object features {
               a(href := routes.Tournament.home())("Arena tournaments")
             ),
             tr(check)(
-              s"Board editor and analysis board with $engineName"
+              "Board editor and analysis board with Stockfish 11+"
             ),
             tr(unlimited)(
               a(href := routes.Puzzle.home())("Tactics puzzles")
@@ -196,6 +196,4 @@ object features {
   private def tr(value: Frag)(text: Frag*) = st.tr(th(text), all(value))
 
   private val title = "Lichess features"
-
-  private val engineName = "Stockfish 11+"
 }

conf/base.conf

@@ -441,7 +441,7 @@ fishnet {
   }
   offline_mode = true # any client can provide moves and analysis
   actor.name = fishnet
-  analysis.nodes = 4000000
+  analysis.nodes = 2250000 # nnue
   move.plies = 300
   client_min_version = "1.15.10"
 }

modules/fishnet/src/main/JsonApi.scala

@@ -47,8 +47,12 @@ object JsonApi {
 
     case class FullEngine(
         name: String,
-        options: EngineOptions
-    ) extends Engine
+        options: EngineOptions,
+        flavor: Option[String]
+    ) extends Engine {
+      // TODO: Monitor only nodes/nps from NNUE analysis
+      def isNnue = flavor.has("nnue")
+    }
 
     case class EngineOptions(
         threads: Option[String],
@@ -90,7 +94,9 @@ object JsonApi {
             .flatMap(_.nodes)
         }
 
-      def strong = medianNodes.fold(true)(_ > Evaluation.acceptableNodes)
+      // fishnet 2.x analysis is never weak in this sense. It is either exactly
+      // the same as analysis provided by any other instance, or failed.
+      def strong = stockfish.flavor.isDefined || medianNodes.fold(true)(_ > Evaluation.legacyAcceptableNodes)
       def weak   = !strong
     }
 
@@ -128,10 +134,10 @@ object JsonApi {
         def invertIf(cond: Boolean) = if (cond) invert else this
       }
 
-      val npsCeil = 10 * 1000 * 1000
+      val npsCeil = 10_000_000
 
-      val desiredNodes    = 3 * 1000 * 1000
-      val acceptableNodes = desiredNodes * 0.9
+      private val legacyDesiredNodes = 3_000_000
+      val legacyAcceptableNodes      = legacyDesiredNodes * 0.9
     }
   }
 
@@ -216,9 +222,13 @@ object JsonApi {
           Json.obj(
             "work" -> Json.obj(
               "type" -> "analysis",
-              "id"   -> a.id
+              "id"   -> a.id,
+              "nodes" -> Json.obj(
+                "nnue"      -> a.nodes,
+                "classical" -> a.nodes * 18 / 10
+              )
             ),
-            "nodes"         -> a.nodes,
+            "nodes"         -> a.nodes * 18 / 10, // bc for fishnet 1.x clients without nnue
             "skipPositions" -> a.skipPositions
           )
       }) ++ Json.toJson(work.game).as[JsObject]

ui/analyse/src/serverSideUnderboard.ts

@@ -75,7 +75,7 @@ export default function(element: HTMLElement, ctrl: AnalyseCtrl) {
   }
 
   function chartLoader() {
-    return `<div id="acpl-chart-loader"><span>Stockfish 11+<br>server analysis</span>${lichess.spinnerHtml}</div>`;
+    return `<div id="acpl-chart-loader"><span>Stockfish 12+<br>server analysis</span>${lichess.spinnerHtml}</div>`;
   }
   function startAdvantageChart() {
     if (lichess.advantageChart || lichess.AnalyseNVUI) return;