## highest number of xy-wings in extra region sudoku?

For fans of Killer Sudoku, Samurai Sudoku and other variants

### highest number of xy-wings in extra region sudoku?

Code: Select all
`#1//B4,JSB..73..5....6..7.........1.8....8..6......9....3......72......94...1.......5...........22.....2222..11..22...1111.2.3..11...33..1.4.3333...44..33..4444.....44.....`

solution:
Hidden Text: Show
Code: Select all
`Solution Path1: 1.2, Hidden Single: R3C4: 5 in block 2: r3c4=52: 1.2, Hidden Single: R1C9: 6 in block 3: r1c9=63: 1.2, Hidden Single: R3C8: 7 in block 3: r3c8=74: 1.2, Hidden Single: R4C7: 4 in block 6: r4c7=45: 1.2, Hidden Single: R4C9: 9 in block 6: r4c9=96: 1.2, Hidden Single: R2C7: 9 in block 3: r2c7=97: 1.2, Hidden Single: R1C5: 9 in block 2: r1c5=98: 1.2, Hidden Single: R7C6: 5 in block 8: r7c6=59: 1.2, Hidden Single: R9C4: 9 in block 8: r9c4=910: 1.5, Hidden Single: R3C3: 3 in row 3: r3c3=311: 1.5, Hidden Single: R6C3: 9 in column 3: r6c3=912: 1.5, Hidden Single: R4C6: 3 in row 4: r4c6=313: 1.5, Hidden Single: R5C2: 6 in extra region 1: r5c2=614: 1.5, Hidden Single: R5C3: 8 in extra region 1: r5c3=815: 1.5, Hidden Single: R4C3: 2 in column 3: r4c3=216: 1.5, Hidden Single: R7C3: 1 in column 3: r7c3=117: 1.0, Hidden Single: R8C3: 4 in column 3: r8c3=418: 2.0, Direct Hidden Pair: Cells R8C1,R9C1: 3,6 in block: r9c1<>7,8, r8c1<>7,8,9, r8c2=919: 1.2, Hidden Single: R3C1: 9 in block 1: r3c1=920: 1.5, Hidden Single: R3C2: 4 in extra region 1: r3c2=421: 2.0, Direct Hidden Pair: Cells R4C1,R4C2: 1,5 in row: r4c1<>7, r4c2<>7, r4c4=722: 1.2, Hidden Single: R5C1: 7 in block 4: r5c1=723: 1.2, Hidden Single: R6C1: 4 in block 4: r6c1=424: 2.6, Pointing: Cells R7C2,R9C2: 8 in block and column: r2c2<>8, r1c2<>825: 2.8, Claiming: Cells R3C5,R3C6: 2 in row and block: r1c6<>2, r2c4<>2, r2c5<>226: 2.8, Claiming: Cells R5C4,R6C4: 2 in column and block: r5c5<>2, r6c6<>2, r6c5<>227: 2.3, Naked Single: R6C6: 1: r6c6=128: 1.2, Hidden Single: R2C5: 1 in block 2: r2c5=129: 1.2, Hidden Single: R5C9: 1 in block 6: r5c9=130: 1.2, Hidden Single: R9C8: 1 in block 9: r9c8=131: 1.5, Hidden Single: R8C9: 5 in column 9: r8c9=532: 2.8, Claiming: Cells R6C4,R7C4: 6 in column and extra region: r7c5<>6, r8c5<>6, r8c6<>633: 2.8, Claiming: Cells R7C5,R8C5: 3 in extra region and block: r9c5<>334: 2.8, Claiming: Cells R7C5,R8C5: 7 in extra region and block: r9c5<>735: 2.8, Claiming: Cells R7C4,R8C6: 8 in extra region and block: r9c6<>836: 3.4, Hidden Pair: Cells R7C5,R8C5: 3,7 in block: r8c5<>237: 3.4, Hidden Pair: Cells R9C2,R9C7: 7,8 in row: r9c7<>2,3,638: 4.2, XY-Wing: Cells R1C6,R1C8,R8C6 on value 2: r8c8<>239: 4.2, XY-Wing: Cells R6C4,R6C7,R7C4 on value 8: r7c7<>840: 4.2, XY-Wing: Cells R8C6,R7C4,R3C6 on value 6: r9c6<>641: 1.5, Hidden Single: R3C6: 6 in column 6: r3c6=642: 1.0, Hidden Single: R3C5: 2 in row 3: r3c5=243: 4.2, XY-Wing: Cells R8C8,R9C7,R8C5 on value 7: r8c7<>744: 1.5, Hidden Single: R8C5: 7 in row 8: r8c5=745: 1.2, Hidden Single: R7C5: 3 in block 8: r7c5=346: 4.2, XY-Wing: Cells R8C8,R9C9,R8C6 on value 2: r9c6<>2, r8c7<>247: 1.2, Hidden Single: R8C6: 2 in block 8: r8c6=248: 1.2, Hidden Single: R5C4: 2 in block 5: r5c4=249: 1.2, Hidden Single: R5C5: 4 in block 5: r5c5=450: 1.2, Hidden Single: R6C5: 5 in block 5: r6c5=551: 1.0, Hidden Single: R6C4: 6 in block 5: r6c4=652: 1.0, Hidden Single: R9C5: 6 in column 5: r9c5=653: 1.2, Hidden Single: R5C8: 5 in block 6: r5c8=554: 1.0, Hidden Single: R5C7: 3 in row 5: r5c7=355: 1.2, Hidden Single: R8C1: 6 in block 7: r8c1=656: 1.2, Hidden Single: R9C1: 3 in block 7: r9c1=357: 1.2, Hidden Single: R9C6: 4 in block 8: r9c6=458: 1.0, Hidden Single: R7C4: 8 in block 8: r7c4=859: 1.0, Hidden Single: R2C4: 4 in column 4: r2c4=460: 1.0, Hidden Single: R1C6: 8 in block 2: r1c6=861: 1.2, Hidden Single: R2C1: 8 in block 1: r2c1=862: 1.2, Hidden Single: R2C2: 5 in block 1: r2c2=563: 1.2, Hidden Single: R1C2: 2 in block 1: r1c2=264: 1.0, Hidden Single: R1C1: 1 in block 1: r1c1=165: 1.0, Hidden Single: R4C1: 5 in column 1: r4c1=566: 1.0, Hidden Single: R4C2: 1 in block 4: r4c2=167: 1.0, Hidden Single: R1C8: 4 in row 1: r1c8=468: 1.2, Hidden Single: R9C2: 8 in block 7: r9c2=869: 1.0, Hidden Single: R7C2: 7 in block 7: r7c2=770: 1.0, Hidden Single: R7C7: 6 in row 7: r7c7=671: 1.2, Hidden Single: R9C9: 2 in block 9: r9c9=272: 1.0, Hidden Single: R2C9: 3 in column 9: r2c9=373: 1.0, Hidden Single: R2C8: 2 in block 3: r2c8=274: 1.0, Hidden Single: R9C7: 7 in row 9: r9c7=775: 1.2, Hidden Single: R6C7: 2 in block 6: r6c7=276: 1.0, Hidden Single: R6C8: 8 in block 6: r6c8=877: 1.0, Hidden Single: R8C7: 8 in column 7: r8c7=878: 1.0, Hidden Single: R8C8: 3 in block 9: r8c8=3`
urhegyi

Posts: 684
Joined: 13 April 2020

### Re: highest number of xy-wings in extra region sudoku?

Like it.
Here is one with some Turbot-fish: 2 SkyScrapers and 1 TurbotCrane and 1 similar for the extra jigsaw regions
Code: Select all
`#1//B4,JSB..26.57.........1................3....5.....4........2..4...8...9...1.......8..4......22.....2222..11..22...1111.2.3..11...33..1.4.3333...44..33..4444.....44.....`

Hajime

Posts: 1197
Joined: 20 April 2018
Location: Fryslân