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export puzzle "day" field for daily puzzles #93

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export puzzle "day" field for daily puzzles #93

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dbd9804
export puzzle "day" field for daily puzzles
allanjoseph98 Apr 18, 2026
b615701
rename column
allanjoseph98 Apr 18, 2026
b3aa4a6
untested: update web template
allanjoseph98 Apr 18, 2026
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5 changes: 5 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
@@ -1,3 +1,8 @@
.bloop/
.metals/
.vscode/

target/
out/
project/project
project/metals.sbt
15 changes: 11 additions & 4 deletions src/main/scala/Puzzles.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import akka.util.ByteString
import chess.format.{ Fen, FullFen }
import com.typesafe.config.ConfigFactory
import java.nio.file.Paths
import java.time.Instant
import lila.db.dsl.*
import reactivemongo.akkastream.cursorProducer
import reactivemongo.api.*
Expand All @@ -27,7 +28,8 @@ object Puzzles:
plays: Int,
themes: List[String],
openings: List[String],
gameUrl: String
gameUrl: String,
day: Option[Instant]
)

def main(args: Array[String]): Unit =
Expand Down Expand Up @@ -65,6 +67,7 @@ object Puzzles:
plays <- doc.int("plays")
themes <- doc.getAsOpt[List[String]]("themes")
gameId <- doc.string("gameId")
day = doc.getAsOpt[Instant]("day")
openings = doc.getAsOpt[List[String]]("opening")
yield PuzzleLine(
id = id,
Expand All @@ -80,7 +83,8 @@ object Puzzles:
val hash = Fen.readPly(fen).map(_ + 1).fold("")(p => s"#$p")
s"https://lichess.org/${gameId}${if asWhite then "" else "/black"}$hash"
,
openings = openings.getOrElse(Nil)
openings = openings.getOrElse(Nil),
day = day
)

def toCsvLine(puzzle: PuzzleLine): String =
Expand All @@ -94,7 +98,8 @@ object Puzzles:
puzzle.plays,
puzzle.themes.sorted.mkString(" "),
puzzle.gameUrl,
puzzle.openings.mkString(" ")
puzzle.openings.mkString(" "),
puzzle.day.map(_.toEpochMilli()).getOrElse("")
).mkString(",")

def csvSink: Sink[String, Future[IOResult]] =
Expand Down Expand Up @@ -134,7 +139,9 @@ object Puzzles:
.map(toCsvLine)
.prepend(
Source(
List("PuzzleId,FEN,Moves,Rating,RatingDeviation,Popularity,NbPlays,Themes,GameUrl,OpeningTags")
List(
"PuzzleId,FEN,Moves,Rating,RatingDeviation,Popularity,NbPlays,Themes,GameUrl,OpeningTags,DailyDate"
)
)
)
.runWith(csvSink)
Expand Down
13 changes: 8 additions & 5 deletions web/index.html.tpl
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Original file line number Diff line number Diff line change
Expand Up @@ -136,12 +136,12 @@
</p>
<h3 id="puzzle_format">Format</h3>
<p>Puzzles are formatted as standard CSV. The fields are as follows:</p>
<pre>PuzzleId,FEN,Moves,Rating,RatingDeviation,Popularity,NbPlays,Themes,GameUrl,OpeningTags</pre>
<pre>PuzzleId,FEN,Moves,Rating,RatingDeviation,Popularity,NbPlays,Themes,GameUrl,OpeningTags,DailyDate</pre>
<h3 id="puzzle_sample">Sample</h3>
<pre>00sHx,q3k1nr/1pp1nQpp/3p4/1P2p3/4P3/B1PP1b2/B5PP/5K2 b k - 0 17,e8d7 a2e6 d7d8 f7f8,1760,80,83,72,mate mateIn2 middlegame short,https://lichess.org/yyznGmXs/black#34,Italian_Game Italian_Game_Classical_Variation
00sJ9,r3r1k1/p4ppp/2p2n2/1p6/3P1qb1/2NQR3/PPB2PP1/R1B3K1 w - - 5 18,e3g3 e8e1 g1h2 e1c1 a1c1 f4h6 h2g1 h6c1,2671,105,87,325,advantage attraction fork middlegame sacrifice veryLong,https://lichess.org/gyFeQsOE#35,French_Defense French_Defense_Exchange_Variation
00sJb,Q1b2r1k/p2np2p/5bp1/q7/5P2/4B3/PPP3PP/2KR1B1R w - - 1 17,d1d7 a5e1 d7d1 e1e3 c1b1 e3b6,2235,76,97,64,advantage fork long,https://lichess.org/kiuvTFoE#33,Sicilian_Defense Sicilian_Defense_Dragon_Variation
00sO1,1k1r4/pp3pp1/2p1p3/4b3/P3n1P1/8/KPP2PN1/3rBR1R b - - 2 31,b8c7 e1a5 b7b6 f1d1,998,85,94,293,advantage discoveredAttack master middlegame short,https://lichess.org/vsfFkG0s/black#62,</pre>
<pre>00sHx,q3k1nr/1pp1nQpp/3p4/1P2p3/4P3/B1PP1b2/B5PP/5K2 b k - 0 17,e8d7 a2e6 d7d8 f7f8,1760,80,83,72,mate mateIn2 middlegame short,https://lichess.org/yyznGmXs/black#34,Italian_Game Italian_Game_Classical_Variation,
00sJ9,r3r1k1/p4ppp/2p2n2/1p6/3P1qb1/2NQR3/PPB2PP1/R1B3K1 w - - 5 18,e3g3 e8e1 g1h2 e1c1 a1c1 f4h6 h2g1 h6c1,2671,105,87,325,advantage attraction fork middlegame sacrifice veryLong,https://lichess.org/gyFeQsOE#35,French_Defense French_Defense_Exchange_Variation,1607774862751
00sJb,Q1b2r1k/p2np2p/5bp1/q7/5P2/4B3/PPP3PP/2KR1B1R w - - 1 17,d1d7 a5e1 d7d1 e1e3 c1b1 e3b6,2235,76,97,64,advantage fork long,https://lichess.org/kiuvTFoE#33,Sicilian_Defense Sicilian_Defense_Dragon_Variation,
00sO1,1k1r4/pp3pp1/2p1p3/4b3/P3n1P1/8/KPP2PN1/3rBR1R b - - 2 31,b8c7 e1a5 b7b6 f1d1,998,85,94,293,advantage discoveredAttack master middlegame short,https://lichess.org/vsfFkG0s/black#62,,</pre>
<h3 id="puzzle_notes">Notes</h3>
<p>
Moves are in UCI format. Use a chess library to convert them to SAN, for display.
Expand All @@ -167,6 +167,9 @@
The <code>OpeningTags</code> field is only set for puzzles starting before move 20.
Here's the <a href="https://github.com/lichess-org/chess-openings">list of possible openings</a>.
</p>
<p>
The <code>DailyDate</code> field is a Unix timestamp in milliseconds. If present, it indicates the date when the puzzle was featured as a daily puzzle on <a href="https://lichess.org/training/daily">lichess.org/training/daily</a>.
</p>
<p>
<a href="https://github.com/ornicar/lichess-puzzler/tree/master/generator">Generating these chess puzzles</a>
took more than 100 years of CPU time.<br />
Expand Down
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