The New Sudoku Players' Forum

by **urhegyi** » Wed Nov 15, 2023 11:19 pm

Another test this time with a self generated jigsaw:
AIC length default 9 --> forcing net
AIC length customized 15 --> hardest step 11 link AIC

Code: Select all: #1//B4,JS 9...7...4...4.8.....1...7.........1.3...8...9.5.....3...4...5.....6.7.......6...1 111112222115588822155577882159578862359777862359976864399776664339996644333344444

Code: Select all: Summary eliminated candidates per Method And per Sudoku Method \ Sudoku | SER | 1 Total/Methods |-------|----------------- Solved Clue elims | 0 | 79 79/0 Naked Singles | 0.1 | 12 12/12 Hidden Singles | 0.2 | 91 91/50 Naked Pair | 3 | 8 8/4 Naked Triple | 3.6 | 4 4/2 Naked Quad | 5 | 1 1/1 Hidden Quad | 5.4 | 6 6/1 Pointing/Claiming | 2.8 | 53 53/26 Locked Singles [3] | 2.9 | 9 9/9 X-Wing [2] | 3.2 | 2 2/2 WXYZ Wing [B4] | 5.5 | 3 3/3 ...XYZ Wing [C] | 4.5 | 2 2/1 Turbot-fish [3] | 4.5 | 11 11/9 XY-chain[13 links] | 5.6 | 2 2/2 AIC-chain[7 links] | 6.1 | 6 6/6 AIC-chain[9 links] | 6.7 | 2 2/2 AIC-chain[11links] | 7.2 | 2 2/1 |-------|----------------- Eliminated Cand's | 293 | 293 Sum(SER * Cand's) | 426.7 | 426.7 Initial Candidates : 293 Maximum SER rating : 7.2 <- Approach Labour rating : 426.7 <- Experimental rating Time needed : 00:00:34.751 SiSeSuSo Solver and Generator (version 2023-11)

by **Hajime** » Fri Nov 17, 2023 8:28 am

urhegyi wrote:Another test this time with a self generated jigsaw:
AIC length default 9 --> forcing net
AIC length customized 15 --> hardest step 11 link AIC

Yes, but the AIC search tree becomes so large and takes so much time, it is not pleasant anymore.
I don't know how to speed it up. Maybe BFS in stead of DFS, but the length of the chain will not become shorter....

by **urhegyi** » Tue Nov 21, 2023 8:46 am

The first jigsaw I found which needed not only a 11 link AIC but for the first time also one with length 13!

Code: Select all: #1//B4,JS ..6...3...........8...4...97.......1.4.....2.1.4...2.65...2...3...976.....7...5.. 111333222141113332141333222444666525484666525484666555888777959877799959888777999

Code: Select all: Summary eliminated candidates per Method And per Sudoku Method \ Sudoku | SER | 1 Total/Methods |-------|----------------- Solved Clue elims | 0 | 88 88/0 Naked Singles | 0.1 | 52 52/52 Hidden Singles | 0.2 | 23 23/8 Naked Single | 2.5 | 1 1/1 Naked Pair | 3 | 23 23/9 Naked Triple | 3.6 | 3 3/1 Naked Quad | 5 | 5 5/3 Hidden Quad | 5.4 | 10 10/6 Hidden Triple | 4 | 4 4/1 Hidden Pair | 3.4 | 8 8/1 Pointing/Claiming | 2.8 | 39 39/22 Locked Singles [3] | 2.9 | 2 2/2 Turbot-fish [3] | 4.5 | 4 4/3 XY-Wing [5 links] | 4.2 | 2 2/1 AIC-chain[11links] | 7.2 | 1 1/1 AIC-chain[13links] | 7.4 | 2 2/1 |-------|----------------- Eliminated Cand's | 267 | 267 Sum(SER * Cand's) | 377.7 | 377.7 Initial Candidates : 267 Maximum SER rating : 7.4 <- Approach Labour rating : 377.7 <- Experimental rating Time needed : 00:02:43.608 SiSeSuSo Solver and Generator (version 2023-11)

by **creint** » Tue Nov 21, 2023 9:47 pm

Code: Select all: #1//B4,JS ..6...3...........8...4...97.......1.4.....2.1.4...2.65...2...3...976.....7...5.. 111333222141113332141333222444666525484666525484666555888777959877799959888777999

This one only needs (or less):
locked singles, hidden/naked pairs, generic x-wings and one simple forcing chains of length 7.

by **urhegyi** » Thu Nov 23, 2023 9:46 pm

creint wrote:
Code: Select all
#1//B4,JS ..6...3...........8...4...97.......1.4.....2.1.4...2.65...2...3...976.....7...5.. 111333222141113332141333222444666525484666525484666555888777959877799959888777999

This one only needs (or less):
locked singles, hidden/naked pairs, generic x-wings and one simple forcing chains of length 7.

Only one simple forching chain?
Can you show the solvepath?

by **Hajime** » Fri Nov 24, 2023 10:40 pm

I am too really interesting in creint's solving path.
The method used in SiSeSuSo can surely be better.
The elapsed time is too much.
I am busy to speed things up, but always open for other solutions.

by **Hajime** » Mon Nov 27, 2023 3:41 pm

Busy with speeding up AIC method. Found a better search.
The last puzzle after basics:

A skyscraper is almost there in (7)r5c9=r2c9-r2c7=r5c7 => (-7)r5c4 (-7)r5c6 (-7)r6c8
Almost because r3c7 with candidate 7 is spoiling it.
BUT what IF r5c9 <>7 => r2c9=7
THEN eliminate "7" in all cells of each houses of r2c9, but remember all cells *)
THEN r3c7<>7 and we have a valid Skyscraper.
THEN restore all eliminations of *)
THEN (-7)r5c4 (-7)r5c6 (-7)r6c8
DONE

(Later this happens for the 2nd time)

Code: Select all: Summary eliminated candidates per Method And per Sudoku Method \ Sudoku | SER | 1 Total/Methods |-------|----------------- Solved Clue elims | 0 | 2459 2459/0 <--- here some errors in the counting, work to do Naked Singles | 0.1 | 46 46/46 Hidden Singles | 0.2 | 34 34/14 Naked Pair | 3 | 21 21/8 Naked Triple | 3.6 | 9 9/3 Hidden Triple | 4 | 4 4/1 <--- Naked/Hidden Quads excluded Hidden Pair | 3.4 | 8 8/1 Pointing/Claiming | 2.8 | 41 41/22 Locked Singles [3] | 2.9 | 3 3/3 X-Wing [2] | 3.2 | 3 3/1 Turbot-fish [3] | 4.5 | 10 10/4 <--- Skyscraper counted double, work to do |-------|----------------- Eliminated Cand's | 2638 | 2638 Sum(SER * Cand's) | 328.1 | 328.1 Initial Candidates : 267 Maximum SER rating : 4.5 <- Approach Labour rating : 328.1 <- Experimental rating Check (conflict) : 267 - 2638 = -2638 Time needed : 00:00:03.284 SiSeSuSo Solver and Generator (version 2023-12)

The complete solving path is:

Hidden Text: Show

Code: Select all: [1,1] r1c2=7 Hidden Single in col 2 [2,1] Naked/Hidden Pairs,Triplets,Quads | NSept (1356789)J6e2456789 => (-3568)r4c4 (-3589)r4c6 [3,1] Naked/Hidden Pairs,Triplets,Quads | NPair (24)r4c46 => (-2)r4c2 (-2)r4c3 (-4)r4c7 (-4)r4c8 [4,1] Pointing, Claiming | (7)J7,r7 => (-7)r7c8 | (5)J7,r8 => (-5)r8c8 | (4)c1,J1 => (-4)r2c4 | (2)J4,c2 => (-2)r9c2 | (2)c3,J1 => (-2)r1c1 (-2)r2c1 (-2)r2c4 | (4)c7,J9 => (-4)r8c9 (-4)r9c8 (-4)r9c9 | (3)J5,c8 => (-3)r2c8 | (4)J5,c8 => (-4)r1c8 [5,1] Naked/Hidden Pairs,Triplets,Quads | NPair (28)c9r89 => (-8)r1c9 (-8)r2c9 (-8)r5c9 | NPair (28)J9e69 => (-8)r7c7 (-8)r8c7 (-8)r9c8 [6,1] Pointing, Claiming | (2)r1,J3 => (-2)r2c6 (-2)r3c4 (-2)r3c6 | (4)r9,J7 => (-4)r7c4 (-4)r7c6 | (8)J2,c8 => (-8)r2c8 (-8)r6c8 (-8)r7c8 (-8)r8c8 [7,1] Pointing, Claiming | (8)J5,c7 => (-8)r2c7 [8,1] Generalized Intersection | (1)r1,c8,J3 => (-1)r2c8 | (6)c7,r3,J3 => (-6)r3c4 | (9)J9,r7,c8 => (-9)r7c8 [9,2] r7c8=4 Naked Single [9,3] r8c8=3 Naked Single [10,4] r8c1=2 Naked Single [10,5] r8c9=8 Naked Single [10,6] r9c9=2 Naked Single [11,7] r8c7=4 Hidden Single in row 8 [12,7] Naked/Hidden Pairs,Triplets,Quads | NPair (15)J7e45 => (-1)r7c4 (-1)r7c6 (-1)r9c4 (-1)r9c5 (-1)r9c6 [13,7] Pointing, Claiming | (6)J3,r2 => (-6)r2c2 | (3)J7,r9 => (-3)r9c1 (-3)r9c2 | (3)J8,c2 => (-3)r2c2 (-3)r3c2 (-3)r4c2 [14,8] r6c2=3 Hidden Single in col 2 [15,8] Pointing, Claiming | (8)r6,J6 => (-8)r4c5 (-8)r5c4 (-8)r5c5 (-8)r5c6 [16,8] 2-String-Kite,SkyScraper,TurbotCrane | Skyscraper (7)r5c9=r2c9-r2c7=r5c7 => (-7)r5c4 (-7)r5c6 (-7)r6c8 [17,8] X-Wing | X-Wing (7)r67c46 => (-7)r2c6 (-7)r3c4 (-7)r3c6 [18,8] Naked/Hidden Pairs,Triplets,Quads | NSext (123589)J3e123479 => (-19)r2c7 (-59)r2c8 [19,8] Naked/Hidden Pairs,Triplets,Quads | NPair (67)r2c78 => (-7)r2c9 | NPair (45)J2e34 => (-5)r1c8 (-5)r3c8 (-5)r4c8 | NPair (45)c9r12 => (-5)r5c9 [20,9] r5c9=7 Naked Single [21,10] r6c8=5 Hidden Single in col 8 [21,11] r9c8=9 Hidden Single in col 8 [21,12] r7c7=1 Hidden Single in jigsaw 9 [22,13] r9c1=6 Naked Single [23,14] r7c4=6 Hidden Single in row 7 [23,15] r7c6=7 Hidden Single in row 7 [23,16] r9c2=1 Hidden Single in row 9 [23,17] r6c4=7 Hidden Single in col 4 [23,18] r8c3=1 Hidden Single in jigsaw 7 [23,19] r8c2=5 Hidden Single in jigsaw 7 [24,20] r5c5=6 Hidden Single in row 5 [25,20] Naked/Hidden Pairs,Triplets,Quads | NTriple (689)r4c278 => (-89)r4c3 (-9)r4c5 | NTriple (135)c4r235 => (-15)r1c4 (-3)r9c4 | NPair (89)J6e89 => (-9)r5c6 [26,20] Pointing, Claiming | (1)J1,r2 => (-1)r2c6 | (5)J4,c3 => (-5)r2c3 (-5)r3c3 [27,20] Pointing, Claiming | (5)J1,r2 => (-5)r2c6 (-5)r2c9 | (5)r3,J3 => (-5)r1c5 (-5)r1c6 [28,21] r2c9=4 Naked Single [29,22] r1c9=5 Naked Single [30,23] r1c1=4 Hidden Single in row 1 [31,23] Naked/Hidden Pairs,Triplets,Quads | NTriple (239)J1e459 => (-3)r2c4 (-39)r2c5 [32,23] Pointing, Claiming | (9)r1,J3 => (-9)r2c6 | (9)J1,r2 => (-9)r2c2 [33,23] 2-String-Kite,SkyScraper,TurbotCrane | Skyscraper (3)r2c1=r5c1-r5c4=r3c4 => (-3)r2c6 (-3)r3c3 [34,24] r2c6=8 Naked Single [34,25] r3c3=2 Naked Single [34,26] r6c6=9 Naked Single [35,27] r1c4=2 Naked Single [35,28] r1c6=1 Naked Single [35,29] r1c8=8 Naked Single [35,30] r2c2=2 Naked Single [35,31] r3c2=6 Naked Single [35,32] r3c7=7 Naked Single [35,33] r3c8=1 Naked Single [35,34] r4c4=4 Naked Single [35,35] r4c6=2 Naked Single [35,36] r4c8=6 Naked Single [35,37] r6c5=8 Naked Single [35,38] r9c4=8 Naked Single [35,39] r9c5=3 Naked Single [35,40] r9c6=4 Naked Single [36,41] r1c5=9 Naked Single [36,42] r2c7=6 Naked Single [36,43] r2c8=7 Naked Single [36,44] r4c5=5 Naked Single [36,45] r5c6=3 Naked Single [37,46] r2c5=1 Naked Single [37,47] r3c6=5 Naked Single [37,48] r4c3=3 Naked Single [37,49] r5c1=9 Naked Single [37,50] r5c4=1 Naked Single [37,51] r5c7=8 Naked Single [38,52] r2c1=3 Naked Single [38,53] r2c3=9 Naked Single [38,54] r2c4=5 Naked Single [38,55] r3c4=3 Naked Single [38,56] r4c2=8 Naked Single [38,57] r4c7=9 Naked Single [38,58] r5c3=5 Naked Single [38,59] r7c2=9 Naked Single [38,60] r7c3=8 Naked Single

Solved with 2 Skyscrapers in 3.3 secs. No forcing Chain of length 7 needed.

Oh yeah: a Skyscraper is a X-chain is a AIC. For all chains only 1 method is implemented, controlled by parameters.

by **urhegyi** » Wed Nov 29, 2023 8:11 pm

Can you try this 15 clue jigsaw with your newest version and show the solvepath?

Code: Select all: #1//B4,JS 7......6.8.....5..4.........6.8.....5..3.......7....1..1..............52........3 111112333111422233144422333445422236455555556478886566777886669778886999777899999 Summary eliminated candidates per Method And per Sudoku Method \ Sudoku | SER | 1 Total/Methods |-------|----------------- Solved Clue elims | 0 | 125 125/0 Naked Singles | 0.1 | 47 47/47 Hidden Singles | 0.2 | 67 67/19 Naked Single | 2.5 | 6 6/2 Naked Pair | 3 | 17 17/6 Naked Triple | 3.6 | 13 13/3 Naked Quad | 5 | 2 2/1 Hidden Triple | 4 | 8 8/1 Hidden Pair | 3.4 | 4 4/1 Pointing/Claiming | 2.8 | 52 52/29 Locked Singles [3] | 2.9 | 13 13/10 X-chain [5 links] | 5.1 | 1 1/1 AIC-chain[9 links] | 6.7 | 1 1/1 AIC-chain[11links] | 7.2 | 1 1/1 |-------|----------------- Eliminated Cand's | 357 | 357 Sum(SER * Cand's) | 388.8 | 388.8 Initial Candidates : 357 Maximum SER rating : 7.2 <- Approach Labour rating : 388.8 <- Experimental rating Time needed : 00:06:45.948 SiSeSuSo Solver and Generator (version 2023-11)

by **Hajime** » Thu Nov 30, 2023 9:56 am

About the same. Some counters still incorrect
But a lot faster

Code: Select all: Summary eliminated candidates per Method And per Sudoku Method \ Sudoku | SER | 1 Total/Methods |-------|----------------- Solved Clue elims | 0 |496832 496832/0 Naked Singles | 0.1 | 44 44/44 Hidden Singles | 0.2 | 75 75/22 Naked Single | 2.5 | 6 6/2 Naked Pair | 3 | 17 17/6 Naked Triple | 3.6 | 13 13/3 Hidden Triple | 4 | 8 8/1 Hidden Pair | 3.4 | 4 4/1 Pointing/Claiming | 2.8 | 52 52/29 Locked Singles [3] | 2.9 | 13 13/10 XYZ Wing [B3] | 4.4 | 1 1/1 Turbot-fish [3] | 4.5 | 6 6/4 AIC-chain[5 links] | 5.5 | 4 4/4 AIC-chain[9 links] | 6.7 | 2 2/2 AIC-chain[11links] | 7.2 | 2 2/2 |-------|----------------- Eliminated Cand's |497079 |497079 Sum(SER * Cand's) | 442.3 | 442.3 Initial Candidates : 357 Maximum SER rating : 7.2 <- Approach Labour rating : 442.3 <- Experimental rating Check (conflict) : 357 - 497079 = -497079 Time needed : 00:00:12.373 SiSeSuSo Solver and Generator (version 2023-12)

Solving path:

Hidden Text: Show

Code: Select all: [1,1] r3c9=5 Hidden Single in row 3 [1,2] r4c3=5 Hidden Single in row 4 [1,3] r4c1=1 Hidden Single in col 1 [1,4] r2c3=6 Hidden Single in jigsaw 1 [1,5] r2c4=4 Hidden Single in jigsaw 4 [2,6] r3c4=7 Hidden Single in col 4 [3,6] Pointing, Claiming | (1)J1,r1 => (-1)r1c6 (-1)r1c7 (-1)r1c9 | (1)c9,r2 => (-1)r2c5 (-1)r2c6 | (1)r2,J3 => (-1)r3c7 | (2)r5,J5 => (-2)r6c7 | (7)J5,r5 => (-7)r5c9 | (5)J7,c2 => (-5)r1c2 | (7)J7,c2 => (-7)r5c2 | (6)c4,J8 => (-6)r6c5 (-6)r7c5 (-6)r8c5 [4,7] r2c9=1 Hidden Single in row 2 [5,7] Naked/Hidden Pairs,Triplets,Quads | NTriple (239)c2r123 => (-29)r5c2 (-239)r6c2 (-39)r8c2 (-29)r9c2 | NSext (234789)J2e123789 => (-2389)r3c5 (-2389)r3c6 | NSept (1234679)J2e2356789 => (-2349)r1c6 | NSingle (8)c6r1 => (-8)r5c6 (-8)r6c6 (-8)r7c6 (-8)r8c6 (-8)r9c6 [6,8] r1c6=8 Naked Single [7,8] Pointing, Claiming | (4)r1,J3 => (-4)r4c8 | (4)J2,r4 => (-4)r4c9 | (7)J3,c8 => (-7)r5c8 (-7)r7c8 (-7)r9c8 [8,8] Generalized Intersection | (6)c9,r7,J6 => (-6)r7c6 (-6)r7c7 | (7)r7,c9,J6 => (-7)r4c9 | (7)c9,r7,J6 => (-7)r7c6 (-7)r7c7 | (8)c9,r7,J6 => (-8)r7c7 (-8)r7c8 | (8)J6,r7,c9 => (-8)r7c9 | (7)r7,J9 => (-7)r8c7 (-7)r9c5 (-7)r9c6 (-7)r9c7 | (7)J6,r8 => (-7)r8c2 | (7)J6,c6 => (-7)r2c6 (-7)r4c6 (-7)r5c6 [9,9] r4c9=9 Naked Single [10,10] r1c9=4 Naked Single [11,11] r7c9=7 Hidden Single in row 7 [11,12] r8c6=7 Hidden Single in row 8 [11,13] r9c2=7 Hidden Single in row 9 [11,14] r6c2=5 Hidden Single in col 2 [11,15] r7c6=5 Hidden Single in col 6 [11,16] r9c4=5 Hidden Single in jigsaw 8 [12,17] r1c5=5 Hidden Single in row 1 [13,17] Naked/Hidden Pairs,Triplets,Quads | NPair (68)J6e25 => (-6)r6c6 [14,17] Pointing, Claiming | (9)J2,r2 => (-9)r2c2 (-9)r2c8 | (4)r5,J5 => (-4)r6c7 | (9)r5,J5 => (-9)r6c7 | (1)J8,r8 => (-1)r8c7 | (2)r9,J7 => (-2)r7c1 (-2)r7c3 [15,17] Naked/Hidden Pairs,Triplets,Quads | NPair (68)r6c79 => (-6)r6c4 (-8)r6c5 [16,17] Pointing, Claiming | (9)J1,r1 => (-9)r1c7 | (9)J3,r3 => (-9)r3c2 (-9)r3c3 | (9)J4,r6 => (-9)r6c4 (-9)r6c5 | (9)J4,c1 => (-9)r7c1 (-9)r8c1 (-9)r9c1 | (9)c2,J1 => (-9)r1c3 (-9)r1c4 | (9)J7,c3 => (-9)r5c3 (-9)r8c3 | (9)c4,J8 => (-9)r7c5 (-9)r8c5 [17,18] r6c4=2 Naked Single [18,19] r1c4=1 Naked Single [19,20] r1c2=9 Hidden Single in row 1 [19,21] r6c1=9 Hidden Single in row 6 [19,22] r9c1=2 Hidden Single in col 1 [20,22] Naked/Hidden Pairs,Triplets,Quads | NPair (23)r3c23 => (-23)r3c7 (-23)r3c8 | NPair (23)c3r13 => (-2)r5c3 (-3)r7c3 (-3)r8c3 [21,22] Pointing, Claiming | (6)r9,J9 => (-6)r8c7 | (3)J8,c5 => (-3)r2c5 (-3)r4c5 [22,22] Generalized Intersection | (8)r7,c3,J8 => (-8)r8c3 | (4)J7,r8,c3 => (-4)r8c3 | (4)J8,r9,c5 => (-4)r9c5 | (8)J8,r9,c5 => (-8)r9c5 | (4)J8,c5 => (-4)r4c5 (-4)r5c5 | (8)J8,c5 => (-8)r5c5 [23,23] r8c3=1 Naked Single [24,23] Naked/Hidden Pairs,Triplets,Quads | NPair (48)r5c23 => (-4)r5c6 (-48)r5c7 (-48)r5c8 (-8)r5c9 | NTriple (468)r5c239 => (-6)r5c5 (-6)r5c6 (-6)r5c7 | NPair (48)J5e23 => (-8)r6c7 | NTriple (346)r6c567 => (-6)r6c9 | NSingle (6)c7r6 => (-6)r9c7 [25,24] r5c9=6 Naked Single [25,25] r6c7=6 Naked Single [25,26] r6c9=8 Naked Single [26,26] 2-String-Kite,SkyScraper,TurbotCrane | Turbot Crane (2)r7c7=r7c8-r2c8=r1c7 => (-2)r4c7 (-2)r5c7 [27,26] AIC-chain [links<=11] | AIC-M2-Wing [5 links] (4=3)r6c6-(3)r2c6=(3-4)r4c7=(4)r4c6 => (-4)r9c6 [28,26] AIC-chain [links<=11] | AIC Type 2 [9 links] (9)r7c3=(9)r7c4-(9)r8c4=(9)r8c7-(9)r3c7=(9-8)r3c8=(8-4)r9c8=(4)r7c8 => (-4)r7c3 [29,26] 2-String-Kite,SkyScraper,TurbotCrane | Skyscraper (4)r6c5=r6c6-r7c7=r7c5 => (-4)r8c5 [30,26] AIC-chain [links<=11] | AIC Type 2 [11 links] (9=2)r5c8-(2)r2c8=(2)r1c7-(2)r1c3=(2)r2c2-(2)r2c6=(2-4)r4c6=(4)r4c7-(4)r8c7=(4)r9c8 => (-9)r9c8 [31,26] XYZ-Wing | XYZ-Wing Type B on {489} in J9e8,J9e2,c7e3 (-8)J9c7 => (-8)r9c7 [32,26] AIC-chain [links<=11] | AIC-??-Wing [5 links] (8)r7c5=(8)r7c3-(8)r9c3=(8-4)r9c8=(4)r7c8 => (-4)r7c5 [33,27] r6c5=4 Hidden Single in col 5 [33,28] r4c6=4 Hidden Single in col 6 [34,29] r6c6=3 Naked Single [35,30] r4c7=3 Hidden Single in jigsaw 2 [35,31] r2c8=3 Hidden Single in jigsaw 3 [35,32] r4c8=7 Hidden Single in jigsaw 3 [36,33] r1c7=2 Naked Single [36,34] r2c2=2 Naked Single [36,35] r2c6=9 Naked Single [36,36] r3c2=3 Naked Single [36,37] r3c3=2 Naked Single [36,38] r4c5=2 Naked Single [36,39] r7c7=4 Naked Single [36,40] r7c8=2 Naked Single [37,41] r1c3=3 Naked Single [37,42] r2c5=7 Naked Single [37,43] r5c8=9 Naked Single [38,44] r3c8=8 Naked Single [38,45] r5c5=1 Naked Single [38,46] r5c6=2 Naked Single [38,47] r5c7=7 Naked Single [38,48] r9c8=4 Naked Single [39,49] r3c5=6 Naked Single [39,50] r3c6=1 Naked Single [39,51] r3c7=9 Naked Single [39,52] r8c7=8 Naked Single [39,53] r9c5=9 Naked Single [39,54] r9c6=6 Naked Single [39,55] r9c7=1 Naked Single [40,56] r8c2=4 Naked Single [40,57] r8c5=3 Naked Single [40,58] r9c3=8 Naked Single [41,59] r5c2=8 Naked Single [41,60] r5c3=4 Naked Single [41,61] r7c3=9 Naked Single [41,62] r7c4=6 Naked Single [41,63] r7c5=8 Naked Single [41,64] r8c1=6 Naked Single [41,65] r8c4=9 Naked Single [42,66] r7c1=3 Naked Single

by **creint** » Thu Nov 30, 2023 4:38 pm

Code: Select all: #1//B4,JS 7......6.8.....5..4.........6.8.....5..3.......7....1..1..............52........3 111112333111422233144422333445422236455555556478886566777886669778886999777899999

Besides basic locked singles and sets. 1 generic XYZ-wing -2r4c7 and 1 generic X-wing -2r5c78.

by **Hajime** » Fri Dec 01, 2023 11:08 am

creint wrote:Besides basic locked singles and sets. 1 generic XYZ-wing -2r4c7 and 1 generic X-wing -2r5c78.

Is the generic XYZ-wing a WXYZ-wing, for jigsawpiece 3 and row 4? Please clarify.
For -2r4c7 in stead a Turbot-fish was found in my solving path, because Turbot is earlier than WXYZ in the method search.
The X-Wing is a grouped X-wing, that SiSeSuSo cannot find yet.

by **creint** » Fri Dec 01, 2023 6:39 pm

XYZ-Wing
r4c8 r1c7 r4c5
237 23 27

Fishes:
jigsawpiece 3 and (piece 6 or row 7) with column 7 and 8
jigsawpiece 2 and (piece 5 or row 5) with column 5 and 6

by **Hajime** » Thu Dec 07, 2023 10:54 am

Great find crient ! My solver is not yet smart enough to find generic XYZ-wing or generic X-wing.

The december 2023 version of SiSeSuSo.exe is now available at
https://sites.google.com/site/sisesuso .

Changes in version 2023-12:

XY,H,M2,M3,W,S,L1,L2,L3-Wing method added, which is an AIC of 3 strong and 2 weak links.
Added an option to AIC method (in Settings) to temporary eliminate more candidates.
Added a extra "0"-button to manual erase a clue from a cell.

by **urhegyi** » Thu Dec 28, 2023 6:29 pm

A good testing example for the new choping technique built-in version 12:

Code: Select all: +---+---+---------------------------+ | . | . | . . . . . 1 8 | | | +---------------+---+---+ | | . | . . . 5 . | . | . | . | | +---------------+ | | | | | . | . . . . | . | . | . | . | | | +---+---+ | | +---+ | . | . . | . | 3 | . | . | 6 . | | | | | | | | | | . | . . | . | . | . | . | . . | | | +---+ | +---+ +---+ | | . | 1 | 8 2 | . . . | . | . | | +---+---+ +---+-------+ | | | . 7 . | 4 | . | . . . | . | +-----------+ | | | | | . . . . | . | . . . | . | +---------------+ +-------+ +---+ | . . . . 6 . . | 9 . | +---------------------------+-------+ #1//B4,JS .......18....5.................3..6...........182......7.4..................6..9. 123333333122222453166662453166742455166742455167744485111798885777798885999999988

by **Hajime** » Fri Dec 29, 2023 8:43 am

Oh yeah. I forgot to mention....

Jigsaw pieces drawing in ASCII layout added.

Like the puzzle above from urhegyi.

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