Triplets & Triangles — LMI February Sudoku Test — 20th to 22nd Feb | |
LMI Tests -> Monthly Sudoku and Puzzle Tests | 45 posts • Page 1 of 2 • 1 2 |
rajeshk |
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WSPC Organizer Posts: 542 Location: India | Checkout one Thropki Sudoku which I recently prepared for the practice of this test http://www.funwithpuzzles.com/2016/02/thropki-sudoku.html | ||||||||||||||||||
mihiryadav |
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Posts: 27 Location: India | Can anyone tell me.....how a black triangle act as a symmetrical arrowhead and which arrowhead is pointing to the two digits? | ||||||||||||||||||
David McNeill |
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Triplets & Triangles Author Posts: 63 Location: United Kingdom | It is the 90 degree corner of the triangle which acts as the point of the arrow (rather than either of the two 45 degree corners). Does this help? | ||||||||||||||||||
Vishal |
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Posts: 22 Location: India | In Max/Min Triplet Sums, I have identified the outside clue-whether max or min- but I am unable to figure out how to use this information as help in solving the Sudoku (apart from Classic rules) ? Please help.. | ||||||||||||||||||
mihiryadav |
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Posts: 27 Location: India | Not able to figure out the two digits which is pointed by corresponding arrowhead. | ||||||||||||||||||
David McNeill |
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Triplets & Triangles Author Posts: 63 Location: United Kingdom | Vishal, Re: Max/Min Triplet Sums I'm not very good at walkthroughs. Try the following. Place two missing 8s by standard logic. Place 2s in boxes 6 and 7 by standard logic. Place 3 in box 8 by standard logic. Place 1 in box 3 by standard logic. Now in row 4, the missing 1 cannot sit either side of the 3 and 2 (otherwise we would have a 6 sum in that row and we are told that 10 is the minimum sum) so it must go in column 2. In the same row, the missing 5 must be either side of the 3 and 2 (otherwise we can't have a 10 sum). Therefore, column 3 in that row must have a 6. In column 5, the 8 sum must be 1-3-4 in some order as the 2 is isolated. The 1 can't lie below the 3 as there would then be a 6 sum. So the 1 must go in row 5 and the 4 in row 6. In box 4, the missing 3 can't go in bottom right corner as there would then be a 9 sum in row 6. So it goes immediately above that with the missing 4 to its left. Then look at the 8 sum in column 3. etc. Edited by David McNeill 2016-02-19 8:36 PM | ||||||||||||||||||
David McNeill |
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Triplets & Triangles Author Posts: 63 Location: United Kingdom | Mihiryadav, Re: Arrowhead Consider the diagonally split cell in top right corner of box 5. The arrow cannot point to the south-east as the first digit in that direction is a 9 and the sum of the first two digits will therefore exceed the allowed value. So, the arrow must point to the north-west and the first two digits in this direction are 3 and 4, adding to 7. The top left triangle in our split cell is coloured black and a 7 is placed in the bottom right triangle. Hope this gets you going. | ||||||||||||||||||
margareta456 |
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Posts: 30 Location: Poland |
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Plucky |
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Posts: 8 Location: United Kingdom |
This was a good test :) would have given it 3-stars if online solving was available - I don't have a printer so for puzzles without online solving I have to write all my answers in MSPaint with my mouse, which makes it take quite a bit longer and makes it difficult to write pencil marks. | ||||||||||||||||||
Vishal |
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Posts: 22 Location: India | Thanks David for your help and guiding me through the solving technique.. By the way, I failed to understand the rule - it was for all the combinations of consecutive numbers along a row and column; not only for the first 3...Thanks for your explanation.. | ||||||||||||||||||
deu |
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Posts: 69 Location: Japan |
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gaurav.kjain |
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SM 2020 (Irregular and Outside) Author Posts: 52 Location: India |
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kishy72 |
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SM 2020 (Math) Author Posts: 417 Location: India |
I really liked this test.Normally,I hate Math based variants in sudoku but this test was different.I remember thinking before the test that I would be happy with a score somewhere around 400.I didn't expect 470 in 90 mins(74?!).In the last 16 mins of the test,I really had a go at Thropki(100) but it seemed beyond my reach despite multiple guesses. I greatly enjoyed solving Outside and Triangular sums both of which had a very systematic solve and I also loved the squeeze variants. Thanks a lot to David for this wonderful test and to all test solvers. The set was delightful and I had great fun! | ||||||||||||||||||
bskbri |
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Sudoku Grand Prix - Turkish Round Author Posts: 34 Location: Turkey | I have two questions on triangular sums: 1. Are we sure that we won't split any more cells? I am confused because the rule says triangles cannot touch grid boundary. These already placed ones are far enough not to touch :) 2. May the three numbers around a triangle be same? | ||||||||||||||||||
David McNeill |
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Triplets & Triangles Author Posts: 63 Location: United Kingdom | Bskbri, Re: Triangular Sums All split cells will be indicated before solving. There is no special rule prohibiting more than one edge of a triangle having the same digit. | ||||||||||||||||||
An LMI player |
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misko |
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Posts: 11 Location: Germany |
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aashay |
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Posts: 46 Location: India | I am unable to submit Classic-3 solution. The answer key is A - 249516837 and B - 847925316 Sorry, was typing the wrong answer I guess. The key was not allowing me to submit. Edited by aashay 2016-02-20 10:27 PM | ||||||||||||||||||
An LMI player |
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An LMI player |
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rakesh_rai |
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Mean Minis (2020) Author Posts: 774 Location: India |
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Swagatam |
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Posts: 45 Location: India |
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An LMI player |
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tiphan |
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Posts: 4 Location: France |
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TiiT |
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Posts: 139 Location: Estonia |
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