Puzzle Ramayan - 2020

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rakesh_rai
Posts: 10
Joined: Sun 31 Oct, 2010 7:49 am

Puzzle Ramayan - 2020

Post by rakesh_rai » Sat 25 Jan, 2020 4:34 pm

The new season for Puzzle Ramayan 2020 has just started on LMI. The first contest started on 24th January and runs till January 28th. Here is the complete schedule:

Classics: 24-28 Jan 2020
Number and Object Placement: 21-25 Feb 2020
Shading and Loops: 20-24 Mar 2020
Evergreens: 17-21 Apr 2020
Casual & Word: 22-26 May 2020
Made In India & Regions: 19-23 Jun 2020

http://logicmastersindia.com/forum

Feadoor
Posts: 152
Joined: Thu 17 May, 2018 7:08 am

Re: Puzzle Ramayan - 2020

Post by Feadoor » Thu 30 Jan, 2020 3:21 pm

A good UK showing, with 6 of us finishing the full set. Our top 3:

16. Neil Zussman - 126.1 (63:53)
39. Freddie Hand - 113 (77:01)
44. James McGowan - 106.8 (83:13)

pinkagape
Posts: 64
Joined: Mon 30 Apr, 2012 4:11 pm

Re: Puzzle Ramayan - 2020

Post by pinkagape » Thu 30 Jan, 2020 7:39 pm

The kakuro really slowed me down.

I feel like there must be some technique to go faster. Is there anything anyone has found to help speed up a kakuro?

Puzzle_Maestro
Posts: 46
Joined: Mon 11 Mar, 2019 5:23 pm

Re: Puzzle Ramayan - 2020

Post by Puzzle_Maestro » Fri 31 Jan, 2020 5:40 pm

One technique I used quite a lot was summing horizontally and vertically to find the value of a cell (as in, taking the sum of all horizontal clues covering a region and comparing to the sum of all vertical clues in the same region). This technique can also be helpful to find the sum of two squares which can impose useful restrictions. Although you were probably already doing this or you couldn't have finished any of the kakuro!

Bifurcation is usually quite effective for kakuro, especially for regions isolated from the rest of the puzzle, and when you have almost completed the puzzle.

If you attempted 15.Kakuro (the one with digit range 1-9), you may have underestimated the importance of the 43 and 44 clues. Using the 43 I was able to place the 9 and 8 in the column which then unlocked the whole upper left. In general, almost all kakuro logic boils down to 'extremal' logic (looking at large/small clues and large/small numbers), 'visualisation' logic (placing some digit eventually leads to a contradiction; I often find this logic easier to see with lots of pencilmarks) or 'summation' logic (summing clues to obtain information about certain cells). I'm hardly an expert at kakuro though, someone else may be able to offer something more helpful!

pinkagape
Posts: 64
Joined: Mon 30 Apr, 2012 4:11 pm

Re: Puzzle Ramayan - 2020

Post by pinkagape » Fri 31 Jan, 2020 9:08 pm

Thank you very much. That’s good to hear.

Feadoor
Posts: 152
Joined: Thu 17 May, 2018 7:08 am

Re: Puzzle Ramayan - 2020

Post by Feadoor » Wed 26 Feb, 2020 9:55 pm

Round 2 UK results:

23. James McGowan - 95
41. Jeremy Kong - 84.3
46. Sam Cappleman-Lynes - 81.8

Like with the Sudoku Round 2 (by one of the same authors), this was much tougher than Round 1. James is joint top among non-finishers.

Puzzle_Maestro
Posts: 46
Joined: Mon 11 Mar, 2019 5:23 pm

Re: Puzzle Ramayan - 2020

Post by Puzzle_Maestro » Wed 25 Mar, 2020 8:49 pm

Round 3 UK results:

10. Freddie Hand - 150.2
27. James McGowan - 140.1
61. Tom Collyer - 118.5

A nice and easy test this round, with 87 finishers in total. Sadly, printer troubles denied me from obtaining a better result (my first submission was at 4:28) but still fairly pleased with my result. Ken finishing in 20 minutes is positively inhuman: more than 7 minutes clear of a very competitive field.

Feadoor
Posts: 152
Joined: Thu 17 May, 2018 7:08 am

Re: Puzzle Ramayan - 2020

Post by Feadoor » Thu 26 Mar, 2020 9:20 am

Puzzle_Maestro wrote:
Wed 25 Mar, 2020 8:49 pm
Ken finishing in 20 minutes is positively inhuman.
There were... *checks notes* ... 22 puzzles. Factoring in time for printing and answer keys, you're probably looking at about 45-50 seconds a puzzle, which I think is about as fast as I could do it if I was just copying the answers.

Well done to you as well, Freddie!

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