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| tilps
| | Joined: 19 Jun 2005 | | Posts: 44 | | : | |
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 Posted: Tue Jul 19, 2005 10:13 am Post subject: Hard sudoku |
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| Code: | ..7.4..AG.....B2
1.G..7C...89....
.4.5...D7.6E9...
....1..6.C.5..3.
.9....3.2.C8A...
..A...7........B
C.8......G9.5.2.
4.2...AG.....C.1
5.9.....82...B.D
.G.D.CB......7.6
2........7...F..
...6E9.7.5....8.
.E..G.1.A..6....
...AB8.EC...F.5.
....25...E3..G.9
6C.....49..F.2.. |
My solver takes a full minute to solve this with full logic trace of what it did. It rates it as a '1.9' difficulty
In 3x3 my system rates things as 0, 1.0, 1.1 or 1.2 0 being trivial, 1.0 being relatively easy, 1.1 being hard/vhard, 1.2 being mostly crazy.
Edit:
rerated with my unlocked solver.
1.3.5
1 lookahead logic length 3 involving forcing quintuples.
Last edited by tilps on Thu Jul 21, 2005 11:10 am; edited 1 time in total |
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| tilps
| | Joined: 19 Jun 2005 | | Posts: 44 | | : | |
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| Posted: Wed Jul 20, 2005 10:53 am Post subject: |
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| Code: | C...A.328ED4.67.
.1F...5G.B...9..
...D..9E.2....A.
..B......3..5.D.
F..8G7.C.5.E....
.7..D....F.8.5..
.EC.9...B......3
.29......61.G..8
6..1.BD......F8.
E......1...D.B5.
..7.C.F....6..2.
....3.6.9.F5A..D
.4.G..2......1..
.3....8.GA..7...
..D...E.37...8C.
.96.147AFD.C...B |
1.13 rating, although it caused me to discover an 'issue' with my program.
This puzzle Requires the following of logical path which are part way towards a logical error. It does not require the error itself though.
Edit:
rerated with my unlocked solver.
1.3.3
1 lookahead logic length 3 involving forcing triples. It turns out to be 'easier' then the previous one not harder. |
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| tilps
| | Joined: 19 Jun 2005 | | Posts: 44 | | : | |
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| Posted: Sat Jul 23, 2005 4:40 am Post subject: |
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1.4.3
| Code: |
B8..|.7..|.9..|3G..
.4..|F..E|2..3|..5C
.E1.|....|....|..A6
....|8D6.|.4A.|.7..
-------------------
.C..|....|..GA|...2
.9..|.C3.|DF7.|E...
.3B.|2.F.|9...|A.6.
..DA|.8B7|.E32|5..F
-------------------
6..1|EFC.|728.|9B..
.B.7|...3|.G.9|.48.
...3|.189|.D4.|..2.
5...|64..|....|..7.
-------------------
..5.|.9G.|.CDF|....
D7..|....|....|.AB.
4A..|D..8|G..6|..E.
..68|..5.|..E.|..C9
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| tilps
| | Joined: 19 Jun 2005 | | Posts: 44 | | : | |
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| Posted: Sat Jul 23, 2005 4:50 am Post subject: |
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1.7.3
| Code: | ..B3|9...|..1F|.7..
..E.|....|.76.|95..
D19.|C.G.|....|F..A
....|D..6|C.35|.2.B
-------------------
....|6B..|7.A.|.G1.
...7|.1.D|G3.9|...4
1...|.E..|..4D|..5.
.A..|....|.2..|83B.
-------------------
.279|..4.|....|..C.
.D..|A9..|..F.|...7
4...|B.18|E.9.|G...
.5C.|.6.7|..BG|....
-------------------
7.D.|E4.3|2..6|....
8..E|....|.B.3|.9F1
..FB|.A9.|....|.C..
..3.|G8..|...4|6A.. |
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| dukuso
| | Joined: 14 Jul 2005 | | Posts: 424 | | : | | Location: germany |
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| Posted: Sun Jul 24, 2005 1:37 pm Post subject: |
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1 solutions, 0(0) guesses, 52879 placements, 158 bifurcations, time=5/91sec.
1 solutions, 2(4) guesses, 220716 placements, 754 bifurcations, time=45/91sec.
1 solutions, 1(2) guesses, 92363 placements, 320 bifurcations, time=60/91sec.
1 solutions, 0(0) guesses, 21775 placements, 73 bifurcations, time=60/91sec.
for these 4 with the one_fork_is_a_dead_end method described elsewhere.
how about this one :
BC-1--6GD-E--F--
--------3--FC-1B
E-6-9A----8-G---
-5--2-------697-
---------B-G-C5-
5-3-F-72-----1--
2-A-5---4--E-8--
--B9-E-3FC--2D--
3----65-G-9-FB--
-E58B--F--D--7--
-2D-C-8----4----
A--6-----E7-----
6--B--9A-D---4F-
--8-G--B-A4----1
G-4-3--E61C----5
--E----5---3--89
BTW. I don't like how the messages are scattered through the threads
and (sub-)forums in these phpbb-boards
Guenter. |
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