The New Sudoku Players' Forum

by **Hajime** » Mon Jun 25, 2018 12:19 pm

My own name in a Sudoku puzzle.
5 heavily overlapping normal Sudoku's, overlapping area's are light blue and some cells are part of 3 grids.
The givens are colored light red and green and form my username.

I will ask my mother for an embroidery on my pillow, so I can sleep on it.
Or maybe even print it on my coffee-cup or the back of my T-shirt.

The puzzle itself is (very) easy. It was more difficult to make

An image

: name_calling.PNG (17.59 KiB) Viewed 1175 times

In code:

Hidden Text: Show

by **m_b_metcalf** » Sat Dec 18, 2021 9:17 am

Thanks for drawing attention to this. Here's a much harder puzzle based on your grid.

Regards,

Mike

Code: Select all: . . . . 3 4 . . 9 . . . . . . . . . . . . . 3 4 . 8 . . . . . . . . . . . . . . . . 7 . . . . . 2 . . . . . . . . . . . . . . . 2 . . . . 8 . . . . 3 . . . . . . . . . . . . . 9 7 . 1 . . . . . . . . . . . . . . 9 . . . . . . . . . 9 . . . . . . . . . . . . . 4 . . 7 8 . . . . . 9 . . . . . . . 4 1 . 7 8 . . . . . . 7 . . . . . . . . . . . . . . 6 . . . . 7 . . . . . . . . . . . . . . . . . . . . . . . 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . . . . . . . . . . . . . . . 4 . . . . 7 . . . . . . . . . . . . . . 5 . . . . . . 5 6 . 3 7 . . . . . . . 8 . . . . . 4 5 . . 9 . . . . . . . . . . . . . 3 . . . . . . . . . 1 . . . . . . . . . . . . . . 8 . 7 2 . . . . . . . . . . . . . 8 . . . . 5 . . . . 9 . . . . . . . . . . . . . . . 2 . . . . . 5 . . . . . . . . . . . . . . . . 3 . 6 4 . . . . . . . . . . . . . 6 . . 2 5 . . . . Number of clues 56, rotationally symmetric.

Code: Select all: 000034009034080000700000200020000800000097010090000000000040078041078000000000600 000800003097010000000000009040078000078000000000600007000000000000000000000100000 078000009000000700600007000000000004000000000100000000000400007005000000800000450 000004000000000000000000000400007000000000560000450090300000000000080720800005000 007000000000560370450090000000000010080720000005000090002000005000030640600250000

by **Hajime** » Sat Dec 18, 2021 9:48 am

I cannot paste the above picture. Can you supply the 5 grids in 81-strings?
Ans I cannot recognize your name in the puzzle :lol:

by **m_b_metcalf** » Sat Dec 18, 2021 9:56 am

Hajime wrote:I cannot paste the above picture. Can you supply the 5 grids in 81-strings?

See above. M

by **Hajime** » Sat Dec 18, 2021 10:29 am

m_b_metcalf wrote:Here's a much harder puzzle based on your grid.

Only Naked/Hidden Subsets and Pointing/Claiming needed ?
Possible Solution Path:

Hidden Text: Show

Code: Select all: [1,1] g1r4c8=9 Hidden Single in row 8 [1,2] g1r9c2=7 Hidden Single in col 9 [1,3] g1r8c7=9 Hidden Single in col 8 [1,4] g1r9c9=1 Hidden Single in box 9 [1,5] g1r9c8=4 Hidden Single in box 8 [1,6] g3r1c8=4 Hidden Single in row 8 [1,7] g3r8c1=4 Hidden Single in row 1 [1,8] g3r8c2=6 Hidden Single in row 2 [1,9] g3r3c4=8 Hidden Single in col 3 [1,10] g3r2c8=8 Hidden Single in col 2 [1,11] g3r3c5=9 Hidden Single in box 8 [1,12] g3r9c3=7 Hidden Single in box 9 [1,13] g4r5c9=4 Hidden Single in row 9 [1,14] g4r6c9=7 Hidden Single in row 9 [1,15] g4r6c7=8 Hidden Single in row 7 [1,16] g4r4c9=2 Hidden Single in box 3 [1,17] g4r4c7=3 Hidden Single in box 1 [1,18] g5r1c5=1 Naked Single [1,19] g5r6c5=4 Naked Single [2,20] g1r3c9=4 Hidden Single in row 9 [2,21] g1r3c8=3 Hidden Single in box 8 [2,22] g1r1c8=8 Hidden Single in box 2 [2,23] g2r3c5=6 Hidden Single in col 3 [2,24] g3r7c2=1 Hidden Single in row 2 [2,25] g3r9c2=9 Hidden Single in row 2 [2,26] g3r9c9=3 Hidden Single in box 9 [2,27] g3r7c8=6 Hidden Single in box 2 [2,28] g4r7c8=8 Naked Single [2,29] g5r7c5=7 Naked Single [3,30] g1r2c8=5 Naked Single [3,31] g1r8c8=2 Naked Single [3,32] g1r8c9=3 Naked Single [3,33] g2r4c4=5 Naked Single [3,34] g3r7c3=2 Naked Single [3,35] g4r5c3=3 Hidden Single in col 5 [3,36] g4r7c5=4 Hidden Single in col 7 [3,37] g5r4c9=3 Hidden Single in row 9 [3,38] g5r7c4=4 Hidden Single in row 4 [3,39] g5r7c6=6 Hidden Single in row 6 [3,40] g5r8c9=2 Hidden Single in row 9 [3,41] g5r8c1=5 Hidden Single in row 1 [3,42] g5r8c2=7 Hidden Single in row 2 [3,43] g5r9c3=4 Hidden Single in row 3 [3,44] g5r3c8=2 Hidden Single in col 3 [3,45] g5r5c8=6 Hidden Single in col 5 [3,46] g5r3c9=6 Hidden Single in col 3 [3,47] g5r4c3=6 Hidden Single in box 3 [3,48] g5r6c4=6 Hidden Single in box 7 [4,49] g1r7c2=6 Naked Single [4,50] g1r8c1=5 Naked Single [4,51] g1r8c4=6 Naked Single [4,52] g2r4c7=3 Hidden Single in col 4 [4,53] g3r7c1=3 Naked Single [4,54] g4r7c7=9 Naked Single [4,55] g4r7c9=5 Naked Single [4,56] g5r3c7=1 Naked Single [4,57] g5r5c9=4 Naked Single [4,58] g5r8c4=1 Naked Single [5,59] g1r2c9=6 Hidden Single in col 2 [5,60] g3r2c9=6 Hidden Single in row 9 [5,61] g3r7c6=9 Hidden Single in col 7 [5,62] g3r3c9=5 Hidden Single in col 3 [5,63] g3r1c7=1 Hidden Single in box 1 [5,64] g3r7c5=5 Hidden Single in box 2 [5,65] g3r8c5=8 Hidden Single in box 5 [5,66] g3r7c7=8 Hidden Single in box 1 [5,67] g4r5c6=1 Naked Single [5,68] g4r8c6=9 Naked Single [5,69] g5r1c8=5 Naked Single [5,70] g5r1c9=9 Naked Single [5,71] g5r2c9=8 Naked Single [5,72] g5r5c7=5 Naked Single [5,73] g5r6c9=7 Naked Single [5,74] g5r8c3=8 Naked Single [5,75] g5r8c6=9 Naked Single [5,76] g5r9c6=8 Naked Single [5,77] g5r9c8=3 Naked Single [5,78] g5r9c9=1 Naked Single [6,79] g3r8c4=7 Hidden Single in row 4 [6,80] g4r9c2=9 Hidden Single in row 2 [6,81] g4r7c4=7 Hidden Single in col 7 [6,82] g4r9c3=7 Hidden Single in box 9 [6,83] g5r1c7=4 Naked Single [6,84] g5r4c7=2 Naked Single [6,85] g5r6c7=8 Naked Single [6,86] g5r7c7=9 Naked Single [6,87] g5r7c8=8 Naked Single [6,88] g5r9c2=9 Naked Single [6,89] g5r9c7=7 Naked Single [7,90] g3r8c8=2 Naked Single [7,91] g4r5c4=9 Naked Single [7,92] g5r6c1=2 Hidden Single in row 1 [8,93] g3r3c8=3 Naked Single [8,94] g4r8c4=1 Hidden Single in col 8 [8,95] g4r9c5=3 Hidden Single in col 9 [8,96] g4r9c9=1 Hidden Single in box 9 [8,97] g4r8c9=3 Hidden Single in box 6 [8,98] g5r7c1=3 Naked Single [8,99] g5r7c2=1 Naked Single [9,100] g3r3c7=2 Naked Single [9,101] g4r3c7=1 Hidden Single in row 7 [9,102] g4r2c7=4 Hidden Single in col 2 [9,103] g4r1c7=2 Hidden Single in box 1 [10,104] g3r4c1=2 Hidden Single in row 1 [10,105] g3r5c3=4 Hidden Single in row 3 [10,106] g3r5c1=7 Hidden Single in col 5 [10,107] g4r2c8=7 Hidden Single in row 8 [11,107] Naked/Hidden Pairs,Triplets,Quads | NTriple (235)g1b8e789 => (-2)g1r7c4 (-2)g1r7c6 | NTriple (235)g1r9c456 => (-23)g1r9c1 (-23)g1r9c3 [12,107] Naked/Hidden Pairs,Triplets,Quads | NPair (19)g1r7c46 => (-9)g1r7c1 (-9)g1r7c3 [13,107] Pointing, Claiming | (6)g1r1b1 => (-6)g1r3c3 | (3)g1r4b4 => (-3)g1r5c1 (-3)g1r5c3 (-3)g1r6c1 (-3)g1r6c3 | (6)g1b5r4 => (-6)g1r4c1 (-6)g1r4c3 | (1)g1b4c1 => (-1)g1r1c1 (-1)g1r2c1 | (6)g2b1r1 => (-6)g2r1c7 (-6)g2r1c8 | (2)g2r1b3 => (-2)g2r2c7 (-2)g2r2c8 (-2)g2r2c9 (-2)g2r3c7 (-2)g2r3c8 | (4)g2r7b7 => (-4)g2r9c1 (-4)g2r9c3 | (4)g2b1c1 => (-4)g2r7c1 | (8)g2b1c1 => (-8)g2r7c1 (-8)g2r8c1 (-8)g2r9c1 | (3)g2c2b7 => (-3)g2r7c1 (-3)g2r7c3 (-3)g2r8c1 (-3)g2r8c3 (-3)g2r9c1 (-3)g2r9c3 | (4)g2c7b3 => (-4)g2r1c8 (-4)g2r2c8 (-4)g2r2c9 (-4)g2r3c8 | (7)g2c7b3 => (-7)g2r1c8 (-7)g2r3c8 | (5)g2c8b3 => (-5)g2r1c7 (-5)g2r2c7 (-5)g2r2c9 (-5)g2r3c7 | (8)g2c8b3 => (-8)g2r2c9 [14,108] g2r2c9=6 Naked Single [14,109] g2r4c9=2 Naked Single [14,110] g3r1c5=6 Naked Single [14,111] g4r8c2=6 Hidden Single in col 8 [14,112] g4r7c3=2 Hidden Single in col 7 [14,113] g4r6c3=6 Hidden Single in col 6 [14,114] g4r7c2=1 Hidden Single in box 2 [14,115] g4r8c3=4 Hidden Single in box 6 [14,116] g4r8c1=5 Hidden Single in box 4 [15,117] g2r2c7=4 Naked Single [15,118] g3r9c5=2 Naked Single [15,119] g4r2c2=3 Naked Single [15,120] g4r6c1=1 Naked Single [16,121] g1r5c7=3 Naked Single [16,122] g1r6c7=4 Naked Single [16,123] g2r5c7=5 Naked Single [16,124] g2r7c8=7 Naked Single [16,125] g2r9c8=4 Naked Single [16,126] g3r2c5=1 Naked Single [16,127] g3r2c6=4 Naked Single [16,128] g4r3c5=7 Hidden Single in row 5 [17,129] g1r5c1=4 Hidden Single in row 1 [17,130] g1r5c3=6 Hidden Single in row 3 [17,131] g1r1c1=6 Hidden Single in col 1 [17,132] g1r4c4=4 Hidden Single in col 4 [17,133] g2r7c3=4 Hidden Single in row 3 [17,134] g2r9c1=7 Hidden Single in row 1 [17,135] g2r1c8=2 Hidden Single in col 1 [18,135] Naked/Hidden Pairs,Triplets,Quads | NPair (69)g2r7c67 => (-9)g2r7c1 (-6)g2r7c2 | NPair (69)g3r4c34 => (-6)g3r4c7 (-9)g3r4c8 | NTriple (169)g3r4c348 => (-1)g3r4c6 | NPair (58)g3b5e39 => (-58)g3r5c6 | NSext (123568)g3b6e124679 => (-1)g3r5c8 | NTriple (358)g4r1c348 => (-8)g4r1c9 | NTriple (135)g4r1c458 => (-5)g4r1c3 | 1 (8)g4b1e3 => (-8)g4r3c3 | NPair (19)g4r2c35 => (-9)g4r2c1 (-9)g4r2c9 | 1 (5)g4r3c3 => (-5)g4r3c4 (-5)g4r3c8 | NTriple (356)g4r3c348 => (-6)g4r3c1 (-6)g4r3c9 | NPair (35)g4r3c38 => (-3)g4r3c4 | 1 (3)g4b3e8 => (-3)g4r1c8 | NPair (56)g4c4r23 => (-5)g4r1c4 | 1 (6)g4c4r3 => (-6)g4r2c4 [19,136] g2r7c9=8 Naked Single [19,137] g2r8c9=1 Naked Single [19,138] g2r9c9=5 Naked Single [19,139] g3r4c7=3 Naked Single [19,140] g3r4c8=1 Naked Single [19,141] g3r5c7=5 Naked Single [19,142] g3r5c8=9 Naked Single [19,143] g3r6c7=6 Naked Single [19,144] g4r1c8=5 Naked Single [19,145] g4r3c8=3 Naked Single [20,146] g2r7c5=5 Naked Single [20,147] g2r8c5=8 Naked Single [20,148] g2r9c5=3 Naked Single [20,149] g2r9c6=9 Naked Single [20,150] g2r9c7=2 Naked Single [20,151] g3r4c3=6 Naked Single [20,152] g3r4c4=9 Naked Single [20,153] g3r5c4=6 Naked Single [20,154] g3r5c9=2 Naked Single [20,155] g3r6c9=8 Naked Single [20,156] g4r1c9=6 Naked Single [20,157] g4r2c9=8 Naked Single [20,158] g4r3c9=9 Naked Single [21,159] g2r7c1=1 Naked Single [21,160] g2r7c2=3 Naked Single [21,161] g2r9c3=6 Naked Single [22,162] g1r7c4=9 Naked Single [22,163] g1r7c6=1 Naked Single [22,164] g2r1c3=5 Naked Single [22,165] g2r1c6=7 Naked Single [22,166] g2r1c7=1 Naked Single [22,167] g2r3c7=7 Naked Single [22,168] g2r9c2=8 Naked Single [23,169] g1r4c3=3 Naked Single [23,170] g1r4c5=6 Naked Single [23,171] g1r7c3=2 Naked Single [23,172] g2r3c2=1 Hidden Single in row 2 [23,173] g2r8c3=9 Hidden Single in row 3 [24,174] g1r1c3=5 Naked Single [24,175] g1r3c5=5 Naked Single [24,176] g1r4c1=1 Naked Single [24,177] g1r6c1=8 Naked Single [24,178] g1r6c3=7 Naked Single [24,179] g1r7c1=3 Naked Single [24,180] g1r9c1=9 Naked Single [24,181] g1r9c3=8 Naked Single [24,182] g1r9c5=2 Naked Single [24,183] g1r9c6=3 Naked Single [24,184] g2r3c3=2 Naked Single [24,185] g2r3c6=5 Naked Single [24,186] g2r3c8=8 Naked Single [24,187] g2r6c1=5 Naked Single [24,188] g2r8c1=2 Naked Single [24,189] g2r8c2=5 Naked Single [25,190] g1r1c2=1 Naked Single [25,191] g1r1c7=7 Naked Single [25,192] g1r2c1=2 Naked Single [25,193] g1r2c6=9 Naked Single [25,194] g1r2c7=1 Naked Single [25,195] g1r3c2=8 Naked Single [25,196] g1r3c3=9 Naked Single [25,197] g1r3c4=1 Naked Single [25,198] g1r3c6=6 Naked Single [25,199] g1r5c2=5 Naked Single [25,200] g1r5c4=8 Naked Single [25,201] g1r5c9=2 Naked Single [25,202] g1r6c4=3 Naked Single [25,203] g2r2c8=5 Naked Single [26,204] g1r1c4=2 Naked Single [26,205] g1r2c4=7 Naked Single

This one also needs X-chains and XY-chains:

Code: Select all: #5//B4/E10/H16/K22/N28 8..34...263..2..1........961.........7......5..8......26.4.....7...........7..... ........5.....5.........83.4.................7........1..............2.75........ ........................6..............2.7..............8........................ ........42.7..............7........3.................1.56.........4.....7........ .....3...........1.....1.87......3..4......1.........884........7..3..293...94..5

But my name is gone

by **m_b_metcalf** » Sat Dec 18, 2021 11:14 am

With 5 clues removed to make it minimal, maybe it's a tad harder?

Code: Select all: 800340002630020010000000090100000000070000005008000000260400000000000000000700000 000000005000005000000000030400000000000000000700000000100000000000000207500000000 000000000000000000000000600000000000000207000000000000008000000000000000000000000 000000004207000000000000007000000003000000000000000001056000000000400000700000000 000003000000000001000001007000000300400000010000000008840000000070000029300094005

by **Hajime** » Sat Dec 18, 2021 2:13 pm

It is about the same difficulty; 5 removed clues do not make it much harder (some more Pointing/Claiming)

Code: Select all: Eliminated candidates per Method/Sudoku (Hajime) Eliminated candidates per Method/Sudoku (m_b_metcalf) Method \ Sudoku | SER | 1 2 3 4 5 Method \ Sudoku | SER | 1 2 3 4 5 |-------|------------------------------ |-------|------------------------------ Not counted elims | 0 | 137 87 138 107 77 Not counted elims | 0 | 132 96 146 103 92 Naked Singles | 0.1 | 32 21 24 26 17 Naked Singles | 0.1 | 33 24 32 29 12 Hidden Singles | 0.2 | 52 73 47 53 58 Hidden Singles | 0.2 | 61 53 35 45 72 Naked Single [1] | 2.5 | 7 0 11 2 0 Naked Single [1] | 2.5 | 7 0 0 0 0 Naked Pair [2] | 3 | 4 1 11 8 3 Naked Pair [2] | 3 | 4 1 1 4 4 Naked Triple [3] | 3.6 | 1 16 8 4 0 Naked Triple [3] | 3.6 | 1 0 0 0 0 Naked Quad [4] | 5 | 4 8 12 0 0 Hidden Quad [5] | 5.4 | 4 2 0 9 0 Hidden Quad [5] | 5.4 | 4 2 0 13 0 Pointing/Claiming | 2.8 | 24 56 64 48 6 Hidden Triple [6] | 4 | 0 0 11 0 0 XY-Wing [3] | 4.1 | 3 0 0 0 0 Hidden Pair [7] | 3.4 | 0 0 1 4 0 XY-chain [10] | 7.2 | 0 2 0 0 0 Hidden Single [8] | 2.5 | 0 0 2 1 0 |-------|------------------------------ Pointing/Claiming | 2.8 | 3 8 18 13 3 Eliminated Cand's | 1205 | 269 234 278 238 186 XY-Wing [3] | 4.1 | 3 0 0 0 0 Sum(SER * Cand's) | 791.4 | 149.7 198 192.4 206.9 44.4 XY-chain [10] | 7.2 | 0 2 0 0 0 |-------|------------------------------ Eliminated Cand's | 1137 | 247 218 283 231 158 Sum(SER * Cand's) | 747.8 | 109 164.9 263.9 179.3 30.7 Initial Candidates : 1137 Initial Candidates : 1205 Maximum SER rating : 7.2 <- Approach Maximum SER rating : 7.2 <- Approach Labour rating : 747.8 <- Experimental rating Labour rating : 791.4 <- Experimental rating Time needed : 00:00:01.498 Time needed : 00:00:01.689

by **m_b_metcalf** » Sat Dec 18, 2021 3:36 pm

Hajime wrote:And I cannot recognize your name in the puzzle

Quintuple X-sudoku, very easy:

Code: Select all: 6 8 1 2 3 7 7 5 1 9 5 3 6 4 9 8 5 4 9 5 1 3 6 2 9 2 7 8 3 5 2 4 9 1 2 4 3 2 3 1 7 5 8 9 1 8 4 7 1 9 5 2 6 3 7 4 1 3 8 3 4 2 5 7 1 3 6 5 9 7 8 1 4 2 4 9 6 2 5 8 9 9 7 3 5 2 4 8 1 6

Code: Select all: 6.......812.....377.5...1.95..3.6..44...9...53.......69.......28.......324.....91 3.6..4985.9...5.1......6.2......2.7......3.5.....91243...2...3....1..7.....5.8... ..2.7......3.5.....91243...2...3....1..7.....5.8......91....8477.4...13.3..4..25. .3.......7....................847195...13....4..25.......71.......365978...49.... 84719526313......825.......71.......36597814249.......62.......58......9973524816

With fewer clues, but still easy:

Code: Select all: 1 2 3 7 7 5 1 9 5 3 6 4 8 4 9 5 1 3 6 2 9 2 7 8 3 5 2 4 9 1 2 3 1 7 5 8 9 1 4 7 1 9 5 7 4 3 3 4 5 1 6 5 9 9 2 8 7 3 5 2 4

Code: Select all: .........12.....377.5...1.95..3.6..44...9...53.......69.......28.......324.....91 3.6..4.8..9...5.1......6.2......2.7......3.5.....91......2...3....1..7.....5.8... ..2.7......3.5.....91.4....2...3....1..7.....5.8......91.....477.4....3.3..4...5. .3.......7.....................47195....3....4...5........1........65978....9.... .47195....3........5........1........659......9........2........8........73524...

by **Hajime** » Wed Dec 22, 2021 3:36 pm

Nice, Mike

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