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Assassin 17 Version 2

 
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sudokuEd
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Joined: 19 Jun 2006
Posts: 257
Location: Sydney Australia

PostPosted: Sat Sep 23, 2006 2:53 am    Post subject: Assassin 17 Version 2 Reply with quote

Look the liberty of making a small change to Assassin 17 to make it a bit harder. It's still solvable by logic.

The text file is in TinyText following. Does anybody have the ability to 'set' a picture version for me?

Have been able to work out how to print out a decent sized picture version once you have downloaded the text version into SumoCue. Will put that in Tiny Text. But you will have to corrupt your computer Andrew and download SumoCue first if you want to use this method!

Making a decent sized print copy
1.Open the puzzle in Sumocue
2.Press the Print Screen button on the keyboard
3.Paste into Paint
4.Click on the Select tool
5.Click and Drag over just the puzzle
6.Select Cut from the Edit menu
7.Paste into a Word document and make it whatever size you want
8.Save and print


3x3::k:6400:6400:6400:5123:5123:5123:4614:4614:4614:2313:4362:6400:5123:5645:2830:2830:4368:4614:2313:4362:5645:5645:5645:3863:2830:4368:4368:2313:4362:4362:4638:4638:3863:3863:4898:2339:4388:4388:4134:4134:4638:4638:4638:4898:2339:3885:3885:4134:3376:7729:7729:7729:4898:4898:3885:3885:4664:3376:3376:7729:6204:6204:6204:3903:2624:4664:4685:4685:3586:3586:3910:6204:3903:2624:4664:4664:4685:4685:3586:3910:3910:
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Ruud
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PostPosted: Sat Sep 23, 2006 9:08 am    Post subject: Reply with quote

In your favorite colors...

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Andrew
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Joined: 11 Aug 2006
Posts: 300
Location: Lethbridge, Alberta

PostPosted: Sat Sep 23, 2006 3:08 pm    Post subject: Reply with quote

Hi Ruud and SudokuEd

I assume the original version of Weekly Assassin 17 will stay as the main puzzle.

At this stage I'm assuming that version 2 is just to make the puzzle a bit harder to do the first steps. The changes appear to be just that the 9(3), 9(2) and 14(2) cages in N89 have become 14(3) and 18(4) cages. At a quick glance the value in R8C6 is unchanged.


Last edited by Andrew on Mon Sep 25, 2006 3:14 pm; edited 2 times in total
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sudokuEd
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Joined: 19 Jun 2006
Posts: 257
Location: Sydney Australia

PostPosted: Sat Sep 23, 2006 10:11 pm    Post subject: Reply with quote

Ruud wrote:
In your favorite colors...

Thanks Ruud. And the colours fit my mood exactly after just hearing that our Australian Women's Basketball Team (The OPALS) are World Champions, beating Russia - who beat the USA in the Semi's. (BTW - our national/international sporting colours are green and gold).

Andrew wrote:
I assume the original version of Weekly Assassin 17 will stay as the main puzzle.

Absolutely. Ruud is just helping me out with the picture of V2.

Quote:
At a quick glance the value in R8C6 is unchanged.

Yeah - it's got the same solution, just changed the cages in N89 around a bit.


Last edited by sudokuEd on Mon Sep 25, 2006 12:26 pm; edited 1 time in total
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sudokuEd
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Location: Sydney Australia

PostPosted: Thu Sep 28, 2006 2:14 pm    Post subject: Reply with quote

Walk-through for Assassin 17 Version 2
1."45" on N3 -> r2c6 = 1
2. "45" N9 -> r8c6 = 8
3. 30(4) cage in N568 = {6789} with 8 locked in r6 -> no 8 elsewhere in r6
4. 17(2) cage in N4 = {89} -> no 8 or 9 elsewhere in r5 or N4
5. "45" on N12 -> 5 outties = 19 -> must have 1 -> no 1 elsewhere in r4 -> 1 required in 18(5) cage in N56 locked in r5 -> no 1 elsewhere in r5
6. 16(3) cage in N45 = {367/457} = 7{36/45}
7. "45" on r6789 -> 3 innies = 8 = {125/134} = 1{25/34} with 1 locked in r6c89 in N6 -> no 1 elsewhere in N6 or r6 -> r5c5 = 1 (hidden single N5)
8. 7 locked in 16(3) cage in N45 now only in r5 -> no 7 elsewhere in r5
9. from step 7, r6c389 = [5{12}/{134}] but r6c89 cannot be {12} = 3 since that requires r45c8 = 16 = {79} but 7 and 9 only in r4c8 -> r6c389 <> [5{12}] -> r6c389 = {134} only -> no 3 or 4 elsewhere in r6.
10. from step 9, r6c89 = {13/14} = 4 or 5 -> r45c8 = 14 or 15 = [95/86/96] -> r4c8 = {89}, r5c8 = {56}
11. from step 9, r6c3 = {34} -> r5c34 = {67/57} = {5/6} -> Killer pair with {56} in r5c8 -> no 5 or 6 elsewhere in r5
12. "45" on c89 -> 2 outies = 12 -> no 1,2 or 6 -> 1 in c7 locked in r89c7 = 6 = {15} only -> no 1 or 5 elsewhere in N9 or c7
13. "45" on N6 -> 3 innies = 17. Max. r56c7 = {49} = 13 -> min. r4c7 = 4 but this means 2 4's in c7 -> no 4 possible in r4c7
14. from step 12,r17c7 = 12 = {39/48}, r23c7 = {28/37/46} -> complex hidden single on 3 in r1237c7 -> no 3 in r5c7.
15.19(4) cage in N6 = 1{369/459/468} = {4/6, 6/9...} -> r456c7 = 17 <> {269/467} (since would leave no combinations for 19(4) cage. -> the only combination left for r456c7 = {278} with r5c7 = 2, {78} pair in r46c7 -> no 7 or 8 elsewhere in c7 or N6, r23c7 = {46} pair in c7 and N3, r4c8 = 9, r23c7 = {46} pair in N3
16."45" on N8 -> 4 outties - 24 = 1 innie -> r6c567 cannot = 24 since that would require r6c4 = r9c4 which is impossible since both are in c4 -> r6c567 <> {789} -> no 6 in r7c6 -> 6 required in 30(4) cage locked in r6 and in N5 -> no 6 elsewhere in r6 or N5.
17. rest of 18(5) cage in N56 now can only = {348/357} but cannot be {357} since r5c4 = {57} -> r4c45 + r5c6 = {348} only with 8 locked in r4 -> r46c7 = [78], r34c6 = [62/35]
18. "45" on N2 -> 1 outie + 2 = 1 innie. r3c6 = {36} -> r3c3 = {14} -> r3c36 [13/46] but cannot be [46] since r3c7 = {46} -> r3c36 = [13], r45c6 = [54], r45c9 = [63], r5c48 = [75], r56c3 = [63]
19. {69} pair in r6c56 -> r6c4 = 2, r7c6 = 7,
20. "45" on N8 -> r9c4 = 1, r89c7 = [15]
21. {57} pair in r6c12 = 12 -> rest of 15(4) cage = 3 = {12}, 18(3) cage in N7 = {458} only, r89c1 = [69} only, r89c2 = {37} only
22. "45" on r89 -> r7c3 = r8c9 = 4
the rest is pretty straight forward
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Andrew
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Joined: 11 Aug 2006
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Location: Lethbridge, Alberta

PostPosted: Fri Dec 07, 2007 10:38 pm    Post subject: Reply with quote

When A17V2 first appeared I didn't get very far with it. I was still resisting using elimination solving; my A17 walkthrough finished "and carry on, the rest is filling in the remaining candidates and simple elimination".

Recently Ed encouraged me to have another go at A17V2, having improved and learned some new techniques in the year or so since it first appeared.

Here is my walkthrough for A17V2. Step 7a, one of the key moves, is probably the most useful IOU I've come across. The hidden killer pair in step 16 was probably a slightly easier way to sort out R456C7 than Ed's hidden complex single in C7, which was itself a neat move.

I found the other key move, step 26, difficult to spot so for that reason I'll rate A17V2 as an easier 1.5 rather than a harder 1.25.

This puzzle differs from A17 because of changes to the cages at R8C4 and R8C6. There were still easy starters at R2C6 and R8C6 but the cage changes took away the other easy starter at R9C6 which now doesn't get placed until "the rest is naked singles".

Here is my walkthrough for A17V2.

Prelims

a) R45C9 = {18/27/36/45}, no 9
b) R5C12 = {89}, locked for R5 and N4, clean-up: no 1 in R4C9
c) R89C1 = {69/78}
d) R89C2 = {19/28/37/46}, no 5
e) R234C1 = {126/135/234}, no 7,8,9
f) 11(3) cage at R2C6 = {128/137/146/236/245}, no 9
g) 30(4) cage at R6C5 = {6789}
h) 18(5) cage at R4C4 = 12{348/357/456}, no 9

1. 45 rule on N3 1 outie R2C6 = 1
1a. R23C7 = 10 = {28/37/46}, no 5

2. 45 rule on N9 1 outie R8C6 = 8, clean-up: no 7 in R9C1, no 2 in R9C2
2a. R89C7 = 6 = {15/24}

3. 8 in 30(4) cage at R6C5 locked in R6C57, locked for R6

4. Killer pair 8,9 in R5C1 and R89C1, locked for C1

5. 45 rule on N2 1 remaining innie R3C6 = 1 outie R3C3 + 2, no 2 in R3C6, no 6,8,9 in R3C3

6. 45 rule on R89 1 outie R7C3 = 1 innie R8C9, no 8 in R7C3

7. 45 rule on N8 2 remaining innies R7C6 + R9C4 = 1 outie R6C4 + 6
7a. IOU no 6 in R7C6
7b. 6 in 30(4) cage at R6C5 locked in R6C567, locked for R6

8. 45 rule on R1234 4 innies R4C4589 = 26 = {2789/3689/4589/4679/5678}, no 1

9. 1 in 18(5) cage at R4C4 locked at R5C57, locked for R5, clean-up: no 8 in R4C9

10. 45 rule on R6789 3 innies R6C389 = 8 = 1{25/34}, 1 locked in R6

11. 16(3) cage at R5C3 = {367/457}, no 1,2
11a. 7 locked in R5C34, locked for R5, clean-up: no 2 in R4C9
11b. 3 of {367} must be in R6C3 -> no 3 in R5C34

12. R6C389 (step 10) = 1{25/34}, 1 locked in R6C89 for N6 and 19(4) cage
12a. 5 of {125} must be in R6C3 -> no 5 in R6C89
12b. Max R6C89 = 5 -> min R45C8 = 14, no 2,3,4, no 5,6,7 in R4C8
12c. Max R45C8 = 15 -> min R6C89 = 4, no 2, clean-up: no 5 in R6C3 (step 10), no 4 in R5C34 (step 11)

13. Naked triple {134} in R6C389, locked for R6

14. Naked triple {567} in R5C348, locked for R5, clean-up: no 3,4 in R4C9

15. R5C5 = 1 (hidden single in R5)

16. Hidden killer pair 8,9 in R456C7 and R4C8 for N6 -> R456C7 must contain 8/9
16a. 45 rule on N6 3 innies R456C7 = 17 = {269/278/359/368} (cannot be {458} which clashes with R89C7, cannot be {467} which doesn’t contain 8,9), no 4
16b. R5C7 = {23} -> no 2,3 in R4C7
16c. 2 in N6 locked in R5C79, locked for R5

17. 45 rule on C89, 2 outies R17C7 = 12 = {39/48/57}, no 1,2,6
17a. 1 in C7 locked in R89C7 = {15}, locked for C7 and N9, clean-up: no 7 in R17C7 (step 17)

18. Killer pair 8,9 in R17C7 and R46C7, locked for C7, clean-up: no 2 in R23C7
18a. Killer pair 3,4 in R17C7 and R23C7, locked for C7 -> R5C7 = 2, clean-up: no 7 in R4C9
[Alternatively R5C7 = 2 (hidden single in C7.]

19. 7 in N6 locked in R46C7, locked for C7, clean-up: no 3 in R23C7
19a. Naked pair {46} in R23C7, locked for C7 and N3, clean-up: no 8 in R17C7 (step 17)
19b. Naked pair {39} in R17C7, locked for C7
19c. Naked pair {78} in R46C7, locked for N6 -> R4C8 = 9
19d. Max R23C8 = 15 -> min R3C9 = 2
19e. Min R4C7 = 7 -> max R34C6 = 8, no 7,9, no 6 in R4C6, clean-up: no 5,7 in R3C3 (step 5)

20. 6 in 30(4) cage at R6C5 locked in R6C56, locked for N5

21. 18(5) cage at R4C4 = 123{48/57}, 3 locked for N5

22. Killer pair 7,8 in R4C45 and R4C7, locked for R4

23. 15(3) cage at R3C6 = {258/267/357} (cannot be {348} which clashes with R5C6), no 4, clean-up: no 2 in R3C3 (step 5)

24. 4 in N5 locked in 18(5) cage at R4C4 = {12348}, 8 locked for R4 and N5 -> R4C7 = 7, R6C7 = 8

25. 15(3) cage at R3C6 (step 23) = {267/357}
25a. 3 of {357} must be in R3C6 -> no 5 in R3C6, clean-up: no 3 in R3C3 (step 5)

26. R3C36 = [13] (cannot be [46] which clashes with R3C7), R4C6 = 5 (step 25), R5C6 = 4, R45C9 = [63], R5C8 = 5, R5C4 = 7, R5C3 = 6, R6C3 = 3
26a. R2C5 + R3C45 = 21 = {489/579/678}, no 2
26b. R7C6 = 7 (only remaining position for 7 in 30(4) cage)

27. R6C4 = 2 (hidden single in N5)
27a. R7C45 = 11 = {56} (only remaining combination), locked for R7 and N8
27b. 2 in N2 locked in R1C56, locked for R1

28. R6C12 = {57} -> R7C12 = 3 = {12}, locked for R7 and N7, clean-up: no 8,9 in R89C2
28a. 5 in N7 locked in R89C3, locked for C3

29. Killer pair 6,7 in R89C12, locked for N7
29a. 7 in C3 locked in R12C3, locked for N1 and 25(4) cage

30. 45 rule on N7 3 outies R6C12 + R9C4 = 13, R6C12 = 12 -> R9C4 = 1, R89C7 = [15]

31. 18(4) cage at R7C3 = {1458} (only remaining combination) = [458], R4C3 = 2, R8C9 = 4 (step 6) , R6C89 = [41], clean-up: no 7 in R8C1, no 6 in R89C2

32. Naked pair {69} in R89C1 -> R5C12 = [89]
32a. Naked pair {37} in R89C2 -> R6C12 = [75]
32b. Naked triple {468} in R123C2, locked for C2 and N1 -> R4C12 = [41], R7C12 = [12], clean-up: no 5 in R23C1 = [32], R1C1 = 5, R1C2 = 4 (cage sum)

33. Naked triple {389} in R7C789, locked for N9

34. R1C8 = 1 (hidden single in R1)

35. R9C5 = 4 (hidden single in R9)

36. 3 in N8 locked in R8C45, locked for R8 -> R89C2 = [73]

37. R7C8 = 3 (hidden single in C8), R7C79 = [98], R1C7 = 3

38. R1C78 = 4 -> R12C9 = 14 = [95]

and the rest is naked singles
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