From 77b5c8f2621fcab1ea0ce1d953329d0c05f768f5 Mon Sep 17 00:00:00 2001
From: miteruzo <miteruzo@naver.com>
Date: Mon, 8 Jun 2026 17:47:19 +0900
Subject: [PATCH] #41

---
 frontend/src/pages/GekanatorPage.tsx | 41 ++++++++++++++++++++++++----
 1 file changed, 35 insertions(+), 6 deletions(-)

diff --git a/frontend/src/pages/GekanatorPage.tsx b/frontend/src/pages/GekanatorPage.tsx
index 7d2b68f..d6f2567 100644
--- a/frontend/src/pages/GekanatorPage.tsx
+++ b/frontend/src/pages/GekanatorPage.tsx
@@ -306,6 +306,10 @@ const chooseQuestion = ({
   const scoredPosts = posts
       .map (post => ({ post, score: scores.get (post.id) ?? 0 }))
       .sort ((a, b) => b.score - a.score)
+  const topScore = scoredPosts[0]?.score ?? 0
+  const nearTopCandidates = scoredPosts.filter (item => topScore - item.score <= 2)
+  const focusCandidates =
+      nearTopCandidates.length >= 2 && nearTopCandidates.length <= 8 ? nearTopCandidates : []
 
   const signatureFor = (
       question:    GekanatorQuestion,
@@ -333,6 +337,7 @@ const chooseQuestion = ({
   const rank = (
       questionsToRank:  GekanatorQuestion[],
       candidates:       { post: Post; score: number }[],
+      focusCandidates:  { post: Post; score: number }[],
   ) => {
     const redundant = redundantSignatures (candidates)
     const nonTagCount =
@@ -349,25 +354,49 @@ const chooseQuestion = ({
 	if (yes === 0 || no === 0)
 	  return null
 
+	const focusSignature = signatureFor (question, focusCandidates)
+	const focusYes = focusSignature.split ('').filter (value => value === '1').length
+	const focusNo = focusCandidates.length - focusYes
+	const separatesFocus = focusCandidates.length >= 2 && focusYes > 0 && focusNo > 0
+
 	const splitScore = Math.abs (candidates.length / 2 - yes)
+	const focusSplitScore = focusCandidates.length >= 2
+	    ? Math.abs (focusCandidates.length / 2 - focusYes)
+	    : 0
 	const tagPenalty = question.kind === 'tag' && nonTagCount < 4 ? 12 : 0
 	const minSide = candidates.length < 10 ? 1 : Math.max (3, candidates.length * .08)
 	const narrowPenalty = yes < minSide || no < minSide ? candidates.length : 0
+	const focusPenalty =
+	    focusCandidates.length >= 2 && !(separatesFocus) ? candidates.length * 10 : 0
 
 	return { question,
-		 score: splitScore + tagPenalty + narrowPenalty,
-		 narrow: narrowPenalty > 0 }
+		 score: focusPenalty
+		     + focusSplitScore * 20
+		     + splitScore
+		     + tagPenalty
+		     + narrowPenalty,
+		 narrow: narrowPenalty > 0,
+		 separatesFocus }
       })
       .filter ((item): item is {
-	  question: GekanatorQuestion
-	  score:    number
-	  narrow:   boolean } => item !== null && Number.isFinite (item.score))
+	  question:        GekanatorQuestion
+	  score:           number
+	  narrow:          boolean
+	  separatesFocus:  boolean } => item !== null && Number.isFinite (item.score))
       .sort ((a, b) => a.score - b.score)
   }
 
   const unansweredQuestions =
       questions.filter (question => !(askedIds.has (question.id)))
-  const ranked = rank (unansweredQuestions, scoredPosts)
+  const ranked = rank (unansweredQuestions, scoredPosts, focusCandidates)
+
+  if (focusCandidates.length >= 2)
+    return (
+	ranked.find (item => item.separatesFocus && !(item.narrow))
+	?? ranked.find (item => item.separatesFocus)
+	?? ranked.find (item => !(item.narrow))
+	?? ranked[0]
+    )?.question ?? null
 
   return (ranked.find (item => !(item.narrow)) ?? ranked[0])?.question ?? null
 }