.
Thanks for your solutions.
Mine uses several impossible patterns, no assumption of uniqueness, and only very short chains.
hidden-pairs-in-a-column: c7{n5 n6}{r4 r5} ==> r5c7≠7, r5c7≠4, r5c7≠3, r5c7≠1, r4c7≠7, r4c7≠4, r4c7≠3
singles ==> r5c9=1, r6c9=8
The 4 patterns that will be used:
- Code: Select all
OR4-anti-tridagon[12] for digits 3, 4 and 7 in blocks:
b2, with cells (marked #): r1c4, r2c5, r3c6
b3, with cells (marked #): r1c7, r2c8, r3c9
b5, with cells (marked #): r4c4, r5c5, r6c6
b6, with cells (marked #): r4c9, r5c8, r6c7
with 4 guardians (in cells marked @): n1r1c7 n5r2c5 n8r2c5 n2r4c9
+-------------------------+-------------------------+-------------------------+
! 145 2 347 ! 347# 3457 6 ! 1347#@ 8 9 !
! 458 3578 3478 ! 1 34578#@ 9 ! 2 347# 6 !
! 14689 136789 34789 ! 23478 23478 347# ! 1347 5 347# !
+-------------------------+-------------------------+-------------------------+
! 2456 3567 2347 ! 347# 1 8 ! 56 9 2347#@ !
! 4568 35678 3478 ! 9 347# 2 ! 56 347# 1 !
! 249 379 1 ! 5 6 347# ! 347# 2347 8 !
+-------------------------+-------------------------+-------------------------+
! 3 19 29 ! 247 247 1457 ! 8 6 2457 !
! 7 4 6 ! 238 238 35 ! 9 1 235 !
! 128 18 5 ! 6 9 1347 ! 347 2347 2347 !
+-------------------------+-------------------------+-------------------------+
EL14c30-OR5-relation for digits: 3, 4 and 7
in cells (marked #): (r2c8 r3c5 r3c6 r3c9 r1c3 r1c4 r1c7 r6c6 r6c7 r4c4 r4c9 r5c3 r5c5 r5c8)
with 5 guardians (in cells marked @) : n2r3c5 n8r3c5 n1r1c7 n2r4c9 n8r5c3
+-------------------------+-------------------------+-------------------------+
! 145 2 347# ! 347# 3457 6 ! 1347#@ 8 9 !
! 458 3578 3478 ! 1 34578 9 ! 2 347# 6 !
! 14689 136789 34789 ! 23478 23478#@ 347# ! 1347 5 347# !
+-------------------------+-------------------------+-------------------------+
! 2456 3567 2347 ! 347# 1 8 ! 56 9 2347#@ !
! 4568 35678 3478#@ ! 9 347# 2 ! 56 347# 1 !
! 249 379 1 ! 5 6 347# ! 347# 2347 8 !
+-------------------------+-------------------------+-------------------------+
! 3 19 29 ! 247 247 1457 ! 8 6 2457 !
! 7 4 6 ! 238 238 35 ! 9 1 235 !
! 128 18 5 ! 6 9 1347 ! 347 2347 2347 !
+-------------------------+-------------------------+-------------------------+
EL14c159-OR6-relation for digits: 3, 4 and 7
in cells (marked #): (r4c4 r4c9 r6c6 r6c7 r5c3 r5c5 r5c8 r3c4 r3c9 r2c3 r2c8 r1c3 r1c4 r1c7)
with 6 guardians (in cells marked @) : n2r4c9 n8r5c3 n2r3c4 n8r3c4 n8r2c3 n1r1c7
+-------------------------+-------------------------+-------------------------+
! 145 2 347# ! 347# 3457 6 ! 1347#@ 8 9 !
! 458 3578 3478#@ ! 1 34578 9 ! 2 347# 6 !
! 14689 136789 34789 ! 23478#@ 23478 347 ! 1347 5 347# !
+-------------------------+-------------------------+-------------------------+
! 2456 3567 2347 ! 347# 1 8 ! 56 9 2347#@ !
! 4568 35678 3478#@ ! 9 347# 2 ! 56 347# 1 !
! 249 379 1 ! 5 6 347# ! 347# 2347 8 !
+-------------------------+-------------------------+-------------------------+
! 3 19 29 ! 247 247 1457 ! 8 6 2457 !
! 7 4 6 ! 238 238 35 ! 9 1 235 !
! 128 18 5 ! 6 9 1347 ! 347 2347 2347 !
+-------------------------+-------------------------+-------------------------+
EL10c6s-OR3-relation for digits: 3, 4 and 7
in cells (marked #): (r9c6 r9c7 r9c8 r5c8 r6c6 r6c7 r2c8 r3c6 r3c9 r3c7)
with 3 guardians (in cells marked @) : n1r9c6 n2r9c8 n1r3c7
+----------------------+----------------------+----------------------+
! 145 2 347 ! 347 3457 6 ! 1347 8 9 !
! 458 3578 3478 ! 1 34578 9 ! 2 347# 6 !
! 14689 136789 34789 ! 23478 23478 347# ! 1347#@ 5 347# !
+----------------------+----------------------+----------------------+
! 2456 3567 2347 ! 347 1 8 ! 56 9 2347 !
! 4568 35678 3478 ! 9 347 2 ! 56 347# 1 !
! 249 379 1 ! 5 6 347# ! 347# 2347 8 !
+----------------------+----------------------+----------------------+
! 3 19 29 ! 247 247 1457 ! 8 6 2457 !
! 7 4 6 ! 238 238 35 ! 9 1 235 !
! 128 18 5 ! 6 9 1347#@ ! 347# 2347#@ 2347 !
+----------------------+----------------------+----------------------+
biv-chain[3]: r6n9{c1 c2} - b7n9{r7c2 r7c3} - b7n2{r7c3 r9c1} ==> r6c1≠2
hidden-single-in-a-row ==> r6c8=2
After these first eliminations, the numbers of guardians are reduced:
- Code: Select all
+----------------------+----------------------+----------------------+
! 145 2 347 ! 347 3457 6 ! 1347 8 9 !
! 458 3578 3478 ! 1 34578 9 ! 2 347 6 !
! 14689 136789 34789 ! 23478 23478 347 ! 1347 5 347 !
+----------------------+----------------------+----------------------+
! 2456 3567 2347 ! 347 1 8 ! 56 9 347 !
! 4568 35678 3478 ! 9 347 2 ! 56 347 1 !
! 49 379 1 ! 5 6 347 ! 347 2 8 !
+----------------------+----------------------+----------------------+
! 3 19 29 ! 247 247 1457 ! 8 6 2457 !
! 7 4 6 ! 238 238 35 ! 9 1 235 !
! 128 18 5 ! 6 9 1347 ! 347 347 2347 !
+----------------------+----------------------+----------------------+
At least one candidate of a previous EL10c6s-OR3-relation between candidates n1r9c6 n2r9c8 n1r3c7 has just been eliminated.
There remains an EL10c6s-OR2-relation between candidates: n1r9c6 n1r3c7
At least one candidate of a previous Trid-OR4-relation between candidates n1r1c7 n5r2c5 n8r2c5 n2r4c9 has just been eliminated.
There remains a Trid-OR3-relation between candidates: n1r1c7 n5r2c5 n8r2c5
At least one candidate of a previous EL14c30-OR5-relation between candidates n2r3c5 n8r3c5 n1r1c7 n2r4c9 n8r5c3 has just been eliminated.
There remains an EL14c30-OR4-relation between candidates: n2r3c5 n8r3c5 n1r1c7 n8r5c3
At least one candidate of a previous EL14c159-OR6-relation between candidates n2r4c9 n8r5c3 n2r3c4 n8r3c4 n8r2c3 n1r1c7 has just been eliminated.
There remains an EL14c159-OR5-relation between candidates: n8r5c3 n2r3c4 n8r3c4 n8r2c3 n1r1c7
EL10c6s-OR2-whip[2]: OR2{{n1r3c7 | n1r9c6}} - c1n1{r9 .} ==> r3c2≠1 whip[1]: c2n1{r9 .} ==> r9c1≠1
z-chain[3]: r7n5{c9 c6} - c6n1{r7 r9} - r9n4{c6 .} ==> r7c9≠4
whip[1]: b9n4{r9c9 .} ==> r9c6≠4
z-chain[3]: r7n5{c9 c6} - c6n1{r7 r9} - r9n7{c6 .} ==> r7c9≠7
whip[1]: b9n7{r9c9 .} ==> r9c6≠7
z-chain[4]: r9c1{n8 n2} - r7c3{n2 n9} - r3n9{c3 c2} - r3n6{c2 .} ==> r3c1≠8
EL10c6s-OR2-whip[5]: OR2{{n1r3c7 | n1r9c6}} - c2n1{r9 r7} - b7n9{r7c2 r7c3} - r3n9{c3 c2} - r3n6{c2 .} ==> r3c1≠1 singles ==> r1c1=1, r1c5=5, r3c7=1
- Code: Select all
+-------------------+-------------------+-------------------+
! 1 2 347 ! 347 5 6 ! 347 8 9 !
! 458 3578 3478 ! 1 3478 9 ! 2 347 6 !
! 469 36789 34789 ! 23478 23478 347 ! 1 5 347 !
+-------------------+-------------------+-------------------+
! 2456 3567 2347 ! 347 1 8 ! 56 9 347 !
! 4568 35678 3478 ! 9 347 2 ! 56 347 1 !
! 49 379 1 ! 5 6 347 ! 347 2 8 !
+-------------------+-------------------+-------------------+
! 3 19 29 ! 247 247 1457 ! 8 6 25 !
! 7 4 6 ! 238 238 35 ! 9 1 235 !
! 28 18 5 ! 6 9 13 ! 347 347 2347 !
+-------------------+-------------------+-------------------+
At least one candidate of a previous Trid-OR3-relation between candidates n1r1c7 n5r2c5 n8r2c5 has just been eliminated.
There remains a Trid-OR1-relation between candidates: n8r2c5
Trid-ORk-relation with only one candidate => r2c5=8hidden-single-in-a-column ==> r8c4=8
- Code: Select all
+-------------------+-------------------+-------------------+
! 1 2 347 ! 347 5 6 ! 347 8 9 !
! 45 357 347 ! 1 8 9 ! 2 347 6 !
! 469 36789 34789 ! 2347 2347 347 ! 1 5 347 !
+-------------------+-------------------+-------------------+
! 2456 3567 2347 ! 347 1 8 ! 56 9 347 !
! 4568 35678 3478 ! 9 347 2 ! 56 347 1 !
! 49 379 1 ! 5 6 347 ! 347 2 8 !
+-------------------+-------------------+-------------------+
! 3 19 29 ! 247 247 1457 ! 8 6 25 !
! 7 4 6 ! 8 23 35 ! 9 1 235 !
! 28 18 5 ! 6 9 13 ! 347 347 2347 !
+-------------------+-------------------+-------------------+
At least one candidate of a previous EL14c30-OR4-relation between candidates n2r3c5 n8r3c5 n1r1c7 n8r5c3 has just been eliminated.
There remains an EL14c30-OR2-relation between candidates: n2r3c5 n8r5c3
At least one candidate of a previous EL14c159-OR5-relation between candidates n8r5c3 n2r3c4 n8r3c4 n8r2c3 n1r1c7 has just been eliminated.
There remains an EL14c159-OR2-relation between candidates: n8r5c3 n2r3c4
hidden-triplets-in-a-block: b1{n6 n8 n9}{r3c1 r3c2 r3c3} ==> r3c3≠7, r3c3≠4, r3c3≠3, r3c2≠7, r3c2≠3, r3c1≠4
EL14c159-OR2-whip[3]: OR2{{n2r3c4 | n8r5c3}} - r3c3{n8 n9} - r7c3{n9 .} ==> r7c4≠2hidden-single-in-a-column ==> r3c4=2
- Code: Select all
+-------------------+-------------------+-------------------+
! 1 2 347 ! 347 5 6 ! 347 8 9 !
! 45 357 347 ! 1 8 9 ! 2 347 6 !
! 69 689 89 ! 2 347 347 ! 1 5 347 !
+-------------------+-------------------+-------------------+
! 2456 3567 2347 ! 347 1 8 ! 56 9 347 !
! 4568 35678 3478 ! 9 347 2 ! 56 347 1 !
! 49 379 1 ! 5 6 347 ! 347 2 8 !
+-------------------+-------------------+-------------------+
! 3 19 29 ! 47 247 1457 ! 8 6 25 !
! 7 4 6 ! 8 23 35 ! 9 1 235 !
! 28 18 5 ! 6 9 13 ! 347 347 2347 !
+-------------------+-------------------+-------------------+
At least one candidate of a previous EL14c30-OR2-relation between candidates n2r3c5 n8r5c3 has just been eliminated.
There remains an EL14c30-OR1-relation between candidates: n8r5c3
EL14c30-ORk-relation with only one candidate => r5c3=8S2-tte