Author: Tawan Sunathvanichkul
This first post will be updated to note any changes/clarifications for the duration of the contest.
You should check it one final time before you start the contest. Newer information will appear at the top.
Addendum (30/6/11 15:25). Puzzle #13 (Digital Futoshiki): It appears there is more than one correct answer for this puzzle. All answer keys for this will be checked manually. Any that are part of a valid solution will of course receive full credit.
Clarification (30/6/11 14:10). Puzzle #8 (Lifesavers): Arrows indicate the direction you must be travelling if you visit that cell. You do not have to visit all arrows.
Amendum (30/6/11 20:15). Puzzle #7 (Pearls): It was felt the solution key arrows could be confused with the clue arrows, especially on a monochrome printer. Instead of the answer key indicators being blue arrows, they are now much smaller, but clearly marked by a letter in a circle. Obviously care should still be taken. Therefore the answer key instructions has had one word changed to reflect this: "Write the number of pearls pointed by the blue lettered arrows, starting with the arrow marked A and then B, C and D"
Contest Notes: (Updated 30 June 2011 16:45)
1) All answers with multiple part keys should be entered separated by commas, with no spaces. You will still get credit (eventually) if you have spaces - it just makes the judges' lives, and your provisional score calculation, easier!
2) Marks for #11 will be allocated afterwards, as the automated scoring isn't clever enough! So don't panic when you're told it's wrong.
3) Since the author has imposed a -5 points score on all incorrect answers, these will be applied at the end of the contest (see (3)!)
4) If you wish to withdraw an answer you think might be wrong, enter a space/spaces in the answer key field, and click Submit.
5) Double-check your answer keys!! Especially make sure if there are multiple parts, that they are all included!
6) If the judges determine 'beyond reasonable doubt' that a puzzle was solved correctly, but a single typo exists in the answer key, 2/3 marks will be given. We will publish all answer keys with verdict and explanation after the contest has finished.
7) If an incorrect row/col is entered as the answer key, and the judges determine 'beyond reasonable doubt' that the puzzle was solved correctly, 1/2 marks will be given. If you accidentally quote a row/col that is revealed early in a standard solve, you will get the -5 penalty for a wrong answer.
8) Please take special care on #7 (Pearls) that you do not mistake a solution key arrow with a clue arrow!
9) Also on #6 (Masyu) and #10 (Yajilin), please ensure you include ALL the letters you visited. The clue letters are in a clear geometric pattern, so please double-check.
10) Use the comments box on your results page to tell us anything you like. Do NOT post appeals or comments on the puzzles in this, or any other, forum until the contest has finished.
Addendum. Puzzle #11 (Giant Octopus): Sample answer key format: "A1-B2,C3-D4,E5-F6".
Clarification. #15 (Ship Sudoku): Regarding rotation/reflection rule:a given 4-cell long ship is marked 1234, it can appear as 1234 or 4321 (horizontally or vertically). But not, 4231, 1324.... etc.
Known Errata from the original IB: (Instruction Booklet) fixed in revised version:
4. 4+5+2=11 (not 13)
8. ADEC is also a valid solution.
14. Solution key should be -NNN-,NN---
15. Other solutions exist for '16' and '3' ships, unless ship clues are given.
16. Another solution exists. (1362/3256/2635/6524)
19. 30 at top of 2nd column should say 35.
With a lack of news regarding the traditional Father's Day Weekend (18-19 June 2011) USA Puzzle Championship (USPC),
[Update: USPC will be on Sat 27 August.]
Tawan Sunathvanichkul has stepped in with his first puzzle contest, very much in the style of the USPC.
This is an excellent set of puzzles - most of the styles will be familiar to past USPC participants. Instruction Book is now available for download.