WPC 2018/Individual Playoffs

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Duration: 21 minutes (1st round), 28 minutes (2nd round), 35 minutes (3rd round)


Mostly from WPC 2018 IB.

The top 10 competitors from the individual competition will qualify for the playoffs. In case of a tie, all players with the same score will compete in the corresponding round. (If inevitable, ties are broken by score without time bonuses, score in Round 5, extra puzzle) Time differences will be calculated proportionally based on the top score and the 10th top score. Maximal difference (between 1st and 10th place) will be 10 minutes.

Finals will be divided into three rounds. The first round will feature competitors who finished in positions 7-10. The winner will progress into the second round along with competitors who finished in positions 4-6. First round winner will have a staggered start as determined by the 7th place competitor. The same goes for the third round. The third round will determine the podium places for the 27th World Puzzle Championship.

The time limits for each round will be 21, 28, 35 minutes respectively. The number of puzzles to be solved will be 3, 4, 5 respectively and their order is the same for all competitors. These puzzles will be chosen by play-off competitors from the sets of puzzles revealed by organisers on Saturday morning. All the puzzle types are from individual rounds 1-13. The selection of puzzles for the finals will take place before the corresponding play-off round, when all four competitors from this round are present at their desks. For each round of finals, 6 (8, 10) different puzzles are prepared. The top seed in this round will choose one puzzle to be solved (and its placement), and one puzzle not to be solved. Then the next seed will choose one puzzle to be solved and not to be solved. And so on.

When a play-off competitor completes a puzzle, he/she must raise his/her hand to indicate to a judge to enter the submission period. The entire puzzle will then be checked over the next minute. After one minute, if the puzzle is correct, the judge will allow the competitor to begin the next puzzle. If the puzzle is incorrect, the judge will return the incorrect puzzle to the competitor. The competitor can resubmit a returned puzzle at any time, and will again enter the submission period.

The first and second round of the play-off stops either with the end of the time limit, or when the first competitor solves correctly all puzzles in the round, whichever is earlier. The third round of the play-off stops either with the end of the time limit, or when 3 competitors solve correctly all puzzles in the round, whichever is earlier.

The rank for a playoff round is determined by a) number of correctly solved puzzles, b) time of the last correct submission, c) score in preliminary rounds. In playoff rounds 1 and 2 we care only about the winner, other players are ranked according to the score in preliminary rounds. In the big finals all positions 1-4 are determined by playoff results.

Puzzle Pool[edit]

Estimated point values were given as a rough measure for each puzzle's difficulty.

Round 1[edit]

Round 2[edit]

Round 3[edit]

Results Summary[edit]

Round 1[edit]

Contestants: Nikola Živanović (7th, Serbia), Philipp Weiß (8th, Germany), Bram de Laat (9th, Netherlands), Zoltán Horváth (10th, Hungary)

Puzzles used:

  • Nikola Živanović selects Overlapping Squares, discards Snail End View Untouchable
  • Philipp Weiß selects Galaxies, discards Double Doubleblock
  • Bram de Laat selects Fillomino 234, discards Sky Battleships

Note: The second puzzle was originally Galaxies (Spiral Galaxies) by Jiří Hrdina, but it was replaced by Sky Battleships because of multiple solutions. Furthermore, the Sky Battleships puzzle was identical to that used in the preliminary rounds (WPC 2018/Round 3), but none of the competitors noticed the error.

Time Offset Overlapping Squares Sky Battleships Fillomino 234
Nikola Živanović (7th) 00:00 01:01 07:08 09:13
Philipp Weiß (8th) 00:07 02:50
Bram de Laat (9th) 00:53 02:07 09:00
Zoltán Horváth (10th) 01:04 02:56 09:01

Round 2[edit]

Contestants: Ulrich Voigt (4th, Germany), Kota Morinishi (5th, Japan), Walker Anderson (6th, USA), Nikola Živanović (7th, Serbia)

Puzzles used:

  • Ulrich Voigt selects Single Block, discards Hitori
  • Kota Morinishi selects Futoshiki, discards Pentominoes IV
  • Walker Anderson selects Loop around Pentominoes, discards Skyscrapers with Parks
  • Nikola Živanović selects Pinocchio Fillomino, discards Hexa Slitherlink
Time Offset Single Block Futoshiki Loop around Pentominoes Pinocchio Fillomino
Ulrich Voigt (4th) 00:00 04:27 08:17 21:47 24:18
Kota Morinishi (5th) 01:04 04:49 08:14 23:11
Walker Anderson (6th) 01:36 03:09 12:07 21:53
Nikola Živanović (7th) 01:49 05:35 10:48 14:48

Round 3[edit]

Contestants: Ken Endo (1st, Japan), Palmer Mebane (2nd, USA), Thomas Snyder (3rd, USA), Ulrich Voigt (4th, Germany)

Puzzles used:

  • Ken Endo selects Nurikabe, discards Double Coral
  • Palmer Mebane selects Regional Fillomino, discards Stalagtites and Stalagmites
  • Thomas Snyder selects Galaxies and Tetrominoes, discards Clouds
  • Ulrich Voigt selects Mathrax, discards Regional Yajilin
  • Wrong Products remains
Time Offset Nurikabe Regional Fillomino Galaxies and Tetrominoes Mathrax Wrong Products
Ken Endo (1st) 00:00 03:36 09:18 15:50 18:08 3rd place
Palmer Mebane (2nd) 06:59 09:18 15:45 19:59 23:03
Thomas Snyder (3rd) 07:03 09:21 13:53 17:10 19:45 29:10 1st place
Ulrich Voigt (4th) 07:07 11:54 15:42 20:23 23:05 30:03 2nd place