The New Sudoku Players' Forum

by **Hajime** » Mon Feb 11, 2019 11:50 am

A symmetrical Valentine puzzle of 16 overlapping Sudoku's.
702 cells to solve. Should be easy, but it is not. Start at the right side.

Like real love the Sudoku's are heav(i/en)ly entwined.
Some boxes are in 3 Sudoku's.
There are 2x Girandola, 2x SudokuX and 2x SudokuP (disjoint groups).
Between the colorful 2 SudokuP something beautiful will happen. Different but the same.

Have a nice Valentine 2019

Larger image:
https://www.dropbox.com/s/nav09knzothg6bt/Valentine_2019.png?dl=1

Larger image with Pencil Marks:
https://www.dropbox.com/s/lqoq44gwdq209u7/Valentine_2019_PM.png?dl=0

In code:

Code: Select all: #16//Q4/AC4/K10,X/AI10,X/W16,P/H22/AL22/K34/AI34/N40,G/AF40,G/Q46/AC46/T52/Z52/W58,P 050008904200095000904700000000001200000200006000300000000900000000010000000000000 504800030000520009000006802009400000600008000000002000000004000000060000000000000 000000000907000000005100000400000000700000000328400000003010000000030000000000053 000000000000000805000008900000000001000000004000001289000010500000030000450000000 000000000000000000000000000000020000004000700100000008200704001000905000000206000 007003010010000030059000000020900001000065007905300800000000000030000080000000000 010500700030000080000000460300004070400670000008002904000000000060000030000000000 000000007000080060000000400000001002000000000010000000000060000285000000003002000 200000000030060000007000000400600000000000000000000080000050000000000518000400300 001002307000000400000000000060000000000000000002000000100000020000000000025000009 203400600006000000000000000000000050000000000000000400010000003000000000900000740 000000000000000000000000000000020000000000008000009000000000000680000000090000000 000000000000000000000000000000010000900000000000900000000000000000000086000000020 020000000000008000009000000000000000000000000000000000050000000706000000040000000 000000010000900000000000900000000000000000000000000000000000030000000501000000080 000000000000000000000000000000000000000000000000000000000040000400080006000902000

A possible journey to the solution:

Hidden Text: Show

Code: Select all: Step Sol Sudoku Row Column Value Why 1 1 1 2 4 4 row 1 2 2 1 2 2 row 1 3 2 3 8 5 row 1 4 2 6 4 6 col 1 5 2 3 5 4 col 1 6 2 2 7 4 col 1 7 3 9 7 9 row 1 8 4 9 3 6 row 1 9 4 7 2 3 col 1 10 5 9 9 4 col 1 11 6 3 1 3 row 1 12 7 3 9 5 row 1 13 7 6 1 6 row 1 14 7 9 9 7 row 1 15 7 4 5 8 col 1 16 7 5 7 3 col 1 17 8 8 9 6 row 1 18 9 6 2 2 col 1 19 10 8 5 2 girandola 1 20 11 3 6 6 col 1 21 11 8 1 3 box 1 22 14 1 7 9 col 2 23 1 1 4 1 col 2 24 2 6 5 9 row 2 25 2 1 9 6 col 2 26 4 8 3 9 col 2 27 7 1 9 3 row 2 28 7 5 9 8 row 2 29 7 6 2 7 row 2 30 8 7 7 2 row 2 31 11 6 2 3 row 2 32 11 9 5 3 col 2 33 12 3 6 6 col 3 34 2 1 6 9 row 3 35 4 7 3 2 col 3 36 7 2 9 9 row 3 37 10 6 8 3 row 3 38 11 5 8 3 girandola 4 39 4 7 1 7 row 4 40 4 3 9 2 col 4 41 7 1 8 2 naked single 4 42 7 2 7 1 box 4 43 14 8 2 3 col 5 44 2 1 7 7 col 5 45 4 8 1 8 col 6 46 2 1 5 1 naked single 6 47 2 2 8 1 naked single 6 48 4 8 2 1 naked single 6 49 4 5 5 8 diagonal 7 50 4 9 4 8 row 7 51 4 7 9 8 col 8 52 4 7 4 9 naked single 9 53 4 9 5 2 naked single 9 54 4 9 8 9 row 9 55 4 2 2 9 diagonal 10 56 4 9 6 7 naked single 10 57 4 8 8 2 row 10 58 4 9 7 1 row 10 59 7 5 3 2 row 10 60 7 6 5 1 col 11 61 4 8 4 5 naked single 11 62 4 9 9 3 naked single 11 63 7 4 4 9 naked single 11 64 7 6 4 3 naked single 11 65 7 6 8 5 naked single 11 66 7 5 8 1 row 11 67 7 4 3 1 box 11 68 7 5 6 5 box 12 69 2 4 7 6 naked single 12 70 4 4 6 5 diagonal 12 71 7 4 2 5 naked single 12 72 7 5 2 9 naked single 13 73 4 1 9 7 naked single 13 74 4 5 8 5 col 13 75 4 8 9 6 col 14 76 4 7 8 4 naked single 14 77 4 8 6 4 naked single 14 78 4 7 6 6 row 14 79 4 8 7 7 row 14 80 4 4 8 7 col 15 81 4 4 4 4 naked single 15 82 4 1 7 4 col 15 83 4 3 3 7 diagonal 15 84 7 8 5 5 naked single 15 85 7 8 4 4 row 16 86 2 6 8 4 naked single 16 87 7 7 4 8 naked single 16 88 7 8 3 9 naked single 16 89 7 8 7 8 row 16 90 7 9 4 2 col 16 91 9 2 4 2 row 17 92 2 5 2 4 row 17 93 2 9 9 4 col 17 94 4 2 5 4 row 17 95 7 7 2 4 naked single 17 96 7 8 9 1 naked single 17 97 7 9 1 1 naked single 17 98 7 8 6 7 row 17 99 7 9 2 8 row 17 100 7 7 1 7 col 17 101 9 8 4 9 naked single 17 102 11 8 9 9 col 18 103 2 8 1 4 row 18 104 2 4 9 5 col 18 105 2 9 7 5 box 18 106 4 2 4 7 row 18 107 4 6 5 7 col 18 108 7 7 8 9 naked single 18 109 7 9 6 9 naked single 18 110 7 7 6 1 row 18 111 7 9 8 4 row 18 112 9 7 4 8 naked single 18 113 9 3 2 4 row 18 114 11 8 7 1 col 19 115 2 9 8 6 naked single 19 116 2 8 2 8 row 19 117 2 4 1 2 col 19 118 2 8 6 5 col 19 119 2 8 8 7 col 19 120 2 7 9 8 col 19 121 2 5 5 5 box 19 122 2 4 8 8 box 19 123 4 1 5 9 naked single 19 124 4 2 8 6 row 19 125 4 3 5 5 row 19 126 4 6 4 3 row 19 127 5 8 2 4 row 19 128 5 8 7 2 col 19 129 9 8 3 4 row 19 130 11 7 7 2 col 19 131 13 2 5 8 col 20 132 2 7 8 2 naked single 20 133 2 5 7 2 row 20 134 2 9 5 8 row 20 135 4 4 5 6 naked single 20 136 4 3 4 6 row 20 137 4 4 1 9 row 20 138 4 5 6 9 col 20 139 9 8 6 2 row 20 140 9 4 2 8 col 20 141 9 5 6 8 col 20 142 11 9 9 5 box 20 143 11 8 5 4 girandola 21 144 2 8 4 9 row 21 145 4 2 6 3 naked single 21 146 4 4 7 3 naked single 21 147 4 5 4 2 naked single 21 148 4 2 3 1 row 21 149 4 5 7 6 row 21 150 4 1 4 1 col 21 151 4 1 6 2 col 21 152 9 5 5 2 col 21 153 9 6 6 4 col 21 154 11 5 5 6 girandola 22 155 2 6 7 3 naked single 22 156 2 8 9 3 naked single 22 157 2 8 7 1 row 22 158 2 8 3 2 row 22 159 2 9 4 2 col 22 160 2 4 6 1 box 22 161 4 1 8 3 naked single 22 162 4 3 8 1 row 22 163 9 8 1 7 naked single 22 164 9 1 8 6 row 22 165 9 3 1 6 col 23 166 2 9 2 1 row 23 167 2 7 4 1 col 23 168 7 7 9 2 naked single 23 169 7 9 5 3 naked single 23 170 7 7 3 3 row 23 171 7 9 7 6 row 23 172 7 4 9 6 col 23 173 9 3 6 5 row 23 174 9 5 2 7 col 24 175 1 7 8 1 box 24 176 2 6 2 5 naked single 24 177 2 7 1 3 naked single 24 178 2 9 1 9 row 24 179 2 3 2 9 col 24 180 5 9 3 1 row 24 181 5 4 7 1 col 24 182 5 8 5 1 box 24 183 7 4 7 2 naked single 24 184 7 7 7 5 naked single 24 185 9 4 6 1 naked single 24 186 9 4 9 3 row 24 187 13 7 8 7 col 25 188 2 7 5 7 naked single 25 189 2 9 3 7 naked single 25 190 2 7 3 5 row 25 191 2 9 6 3 row 25 192 2 4 5 3 col 25 193 5 4 1 9 col 25 194 9 6 9 5 naked single 25 195 9 4 8 2 row 25 196 9 4 3 5 row 25 197 9 9 5 1 col 26 198 2 2 6 7 naked single 26 199 2 4 2 7 naked single 26 200 2 5 3 3 naked single 26 201 2 5 4 7 naked single 26 202 2 7 2 6 naked single 26 203 2 2 2 3 col 26 204 2 2 3 6 col 26 205 2 3 4 3 col 26 206 5 9 1 7 col 26 207 5 5 9 9 col 26 208 5 6 6 9 sudokuP 26 209 9 1 3 9 naked single 26 210 9 6 4 3 naked single 26 211 9 1 2 5 row 26 212 9 5 4 5 row 26 213 9 9 1 5 col 26 214 9 7 2 1 col 27 215 1 8 8 9 box 27 216 2 2 1 8 naked single 27 217 2 3 3 1 naked single 27 218 2 3 1 7 row 27 219 2 6 3 8 col 27 220 5 1 5 9 row 27 221 5 8 8 7 row 27 222 5 7 3 9 col 27 223 9 9 2 9 naked single 27 224 9 9 3 8 row 27 225 9 2 1 8 col 27 226 11 7 5 5 col 27 227 11 7 6 9 col 27 228 13 2 4 5 col 27 229 13 2 6 1 col 28 230 1 5 6 9 row 28 231 2 6 1 1 naked single 28 232 5 7 7 6 row 28 233 5 9 8 9 row 28 234 5 6 5 7 col 28 235 5 4 8 4 sudokuP 28 236 5 4 2 7 sudokuP 28 237 9 2 3 1 naked single 28 238 9 7 1 3 naked single 28 239 9 9 8 7 naked single 28 240 9 9 9 2 row 28 241 9 7 3 2 col 28 242 11 6 3 2 row 28 243 11 8 6 7 col 29 244 5 6 7 5 naked single 29 245 5 8 9 3 naked single 29 246 5 4 4 5 row 29 247 5 6 4 4 row 29 248 5 3 5 4 col 29 249 5 9 7 8 col 29 250 5 4 9 6 col 29 251 5 8 3 6 sudokuP 29 252 9 5 3 3 naked single 29 253 9 9 6 6 naked single 29 254 9 7 6 7 row 29 255 11 9 3 8 naked single 29 256 11 9 6 1 naked single 29 257 11 6 1 7 row 30 258 1 8 9 7 naked single 30 259 1 7 7 4 box 30 260 5 1 4 8 naked single 30 261 5 7 8 5 naked single 30 262 5 8 1 8 naked single 30 263 5 9 5 3 naked single 30 264 5 3 2 8 row 30 265 5 6 2 6 row 30 266 5 9 2 5 row 30 267 5 3 3 5 col 30 268 5 2 5 5 col 30 269 5 7 5 8 col 30 270 5 5 6 8 sudokuP 30 271 11 8 3 5 naked single 30 272 11 3 1 8 row 30 273 11 7 3 7 row 30 274 14 1 8 8 col 31 275 1 7 9 2 naked single 31 276 1 9 4 6 naked single 31 277 3 6 5 5 row 31 278 5 2 6 1 naked single 31 279 5 4 6 3 naked single 31 280 5 5 5 6 naked single 31 281 5 6 8 2 naked single 31 282 5 7 2 3 naked single 31 283 5 1 6 7 row 31 284 5 3 6 2 row 31 285 5 4 3 8 row 31 286 5 5 4 1 row 31 287 5 5 1 5 row 31 288 5 6 3 3 row 31 289 5 5 2 2 col 31 290 5 5 8 3 col 31 291 11 3 3 9 naked single 31 292 11 3 4 1 row 31 293 11 3 2 5 row 31 294 11 7 1 4 row 31 295 11 2 1 1 col 31 296 11 4 3 4 col 31 297 13 4 7 8 row 31 298 15 1 3 5 row 32 299 1 9 7 3 naked single 32 300 1 8 7 6 box 32 301 3 6 6 6 row 32 302 5 3 4 6 row 32 303 9 5 1 9 naked single 32 304 9 6 5 7 naked single 32 305 9 5 7 1 row 32 306 9 6 7 9 row 32 307 9 4 5 9 col 32 308 10 7 7 6 naked single 32 309 11 1 2 7 naked single 32 310 11 2 2 4 naked single 32 311 11 4 1 6 naked single 32 312 11 7 8 6 naked single 32 313 11 4 2 9 row 32 314 11 8 8 8 row 33 315 5 2 4 3 naked single 33 316 9 4 7 7 naked single 33 317 9 5 8 4 naked single 33 318 9 7 7 6 naked single 33 319 9 5 9 6 row 33 320 9 7 8 9 row 33 321 10 9 5 6 col 33 322 15 8 8 9 col 34 323 9 7 9 4 naked single 34 324 10 1 1 6 girandola 34 325 14 8 8 2 naked single 35 326 10 8 3 6 row 35 327 14 8 7 8 naked single 35 328 15 6 1 2 row 36 329 12 9 3 2 row 36 330 14 8 9 4 naked single 36 331 14 2 9 2 row 36 332 14 5 9 8 row 37 333 11 8 2 6 naked single 37 334 11 8 4 2 row 37 335 11 9 2 2 col 37 336 14 7 6 4 row 37 337 14 4 7 4 box 38 338 11 9 4 6 naked single 38 339 13 7 5 5 naked single 38 340 13 7 7 4 row 38 341 15 2 2 4 row 38 342 15 7 9 4 row 39 343 10 7 9 4 box 39 344 13 7 9 3 naked single 39 345 13 9 9 5 col 39 346 15 2 1 7 row 39 347 15 1 6 6 col 39 348 15 9 9 2 col 40 349 10 8 8 1 naked single 40 350 10 8 9 3 col 40 351 10 9 8 7 box 40 352 14 3 4 4 col 40 353 15 6 2 5 row 40 354 16 6 2 2 row 41 355 10 8 7 5 naked single 41 356 10 9 7 8 naked single 41 357 10 9 1 4 row 41 358 10 8 4 4 col 41 359 12 8 5 9 naked single 41 360 12 6 9 2 row 41 361 12 9 1 5 row 41 362 14 6 9 9 row 41 363 14 9 7 5 col 41 364 16 6 1 8 row 42 365 8 8 6 4 row 42 366 10 4 8 4 col 42 367 12 5 3 7 row 42 368 12 6 8 5 row 42 369 13 9 7 9 row 42 370 14 9 3 1 naked single 42 371 14 7 3 8 row 43 372 12 9 6 7 naked single 43 373 12 2 5 5 col 43 374 13 8 7 1 naked single 43 375 14 9 1 9 naked single 43 376 14 7 1 2 row 44 377 10 5 9 8 row 44 378 10 2 5 8 girandola 44 379 12 2 4 2 col 44 380 13 8 4 2 naked single 44 381 14 7 8 9 col 44 382 15 9 5 9 row 45 383 10 4 9 1 naked single 45 384 10 1 8 8 row 45 385 12 3 8 2 col 45 386 13 2 2 9 col 45 387 16 2 1 2 row 45 388 16 2 9 9 row 45 389 16 8 3 2 sudokuP 46 390 10 3 7 1 row 46 391 12 8 6 5 naked single 46 392 12 7 6 2 row 46 393 13 8 6 3 naked single 46 394 13 7 6 9 row 46 395 14 4 6 9 col 47 396 12 7 7 5 row 47 397 13 9 6 6 naked single 47 398 14 8 6 5 col 47 399 14 3 7 3 col 48 400 16 9 9 5 row 48 401 16 7 6 5 col 49 402 15 7 5 5 row 49 403 15 3 6 5 col 49 404 16 8 2 5 row 49 405 16 2 7 5 col 50 406 13 1 2 5 row 50 407 16 8 7 9 row 50 408 16 5 2 9 col 50 409 16 7 1 9 box 51 410 12 5 8 6 naked single 51 411 12 5 7 9 row 51 412 14 8 4 1 naked single 52 413 12 7 5 6 row 52 414 14 5 7 6 naked single 52 415 14 7 7 1 col 52 416 15 5 2 1 row 53 417 12 9 5 8 naked single 53 418 12 7 8 8 row 53 419 12 8 3 1 row 53 420 14 3 8 6 naked single 53 421 14 3 9 1 row 53 422 15 8 5 6 row 53 423 16 8 6 1 row 53 424 16 9 5 6 box 54 425 10 9 6 3 naked single 54 426 10 9 4 1 row 54 427 10 2 6 1 col 54 428 12 7 4 1 row 54 429 13 7 1 6 row 54 430 13 7 4 8 row 54 431 13 1 1 8 col 54 432 13 3 2 6 col 54 433 15 7 4 8 col 54 434 16 7 2 6 col 54 435 16 3 1 6 sudokuP 55 436 10 7 5 5 naked single 55 437 12 7 3 4 naked single 55 438 12 1 9 6 row 55 439 13 1 3 7 naked single 55 440 13 9 4 1 naked single 55 441 14 7 9 6 row 55 442 14 9 6 6 col 55 443 15 7 6 2 row 55 444 15 1 4 2 col 55 445 16 7 7 2 col 56 446 8 6 9 4 col 56 447 8 9 8 4 box 56 448 12 1 3 5 row 56 449 12 3 9 5 col 56 450 13 2 1 3 naked single 56 451 13 4 2 3 naked single 56 452 13 7 3 1 naked single 56 453 13 2 3 2 row 56 454 13 7 2 2 row 56 455 13 3 1 1 col 56 456 15 7 7 7 naked single 56 457 15 9 7 6 row 56 458 15 9 4 1 col 57 459 8 4 8 9 naked single 57 460 8 4 5 4 box 57 461 8 8 8 1 box 57 462 10 6 2 1 row 57 463 12 1 7 8 row 57 464 12 3 7 1 row 57 465 12 2 9 4 col 57 466 13 3 3 4 naked single 57 467 13 5 3 8 naked single 57 468 13 5 2 1 row 57 469 13 9 3 3 row 57 470 15 9 6 4 row 57 471 15 8 4 3 col 57 472 16 7 8 1 row 58 473 8 4 7 5 naked single 58 474 8 8 5 3 naked single 58 475 8 9 4 5 row 58 476 12 9 9 1 naked single 58 477 12 9 4 3 row 58 478 13 9 2 8 row 58 479 14 9 9 7 naked single 58 480 14 9 8 3 row 58 481 14 4 9 3 col 58 482 15 8 6 7 naked single 58 483 16 8 4 7 naked single 58 484 16 8 8 3 row 58 485 16 7 4 3 col 58 486 16 7 9 8 col 58 487 16 9 1 3 sudokuP 58 488 16 2 3 3 sudokuP 58 489 16 9 3 8 sudokuP 59 490 8 7 8 3 row 59 491 10 7 3 3 row 59 492 12 4 9 7 naked single 59 493 12 8 4 4 naked single 59 494 12 9 8 4 naked single 59 495 12 4 8 1 row 59 496 12 8 8 7 row 59 497 12 7 1 3 col 59 498 14 4 8 7 naked single 59 499 14 7 4 7 naked single 59 500 14 7 5 3 row 59 501 14 1 4 3 col 59 502 16 7 3 7 naked single 59 503 16 3 7 7 row 59 504 16 9 2 1 row 60 505 8 6 8 7 naked single 60 506 10 7 2 7 row 60 507 12 1 8 9 naked single 60 508 12 2 7 7 naked single 60 509 12 7 2 7 naked single 60 510 12 1 4 7 row 60 511 12 2 8 3 row 60 512 13 6 1 4 naked single 60 513 13 8 2 4 naked single 60 514 13 9 5 4 naked single 60 515 13 6 2 7 row 60 516 13 8 5 7 row 60 517 16 9 7 4 naked single 60 518 16 9 8 7 naked single 61 519 8 8 7 9 naked single 61 520 8 8 4 7 row 61 521 8 3 5 7 col 61 522 8 5 6 7 col 61 523 8 9 7 7 col 61 524 10 6 7 9 naked single 61 525 10 8 2 8 col 62 526 6 8 4 7 col 62 527 8 9 9 8 naked single 62 528 8 1 5 2 col 62 529 8 1 7 8 col 62 530 10 7 4 8 naked single 62 531 10 8 1 9 naked single 62 532 10 7 6 9 row 63 533 6 4 8 5 col 63 534 6 5 8 9 col 63 535 8 1 8 5 naked single 63 536 8 7 4 8 naked single 63 537 8 2 7 1 col 63 538 8 3 8 2 col 63 539 8 7 6 9 box 64 540 6 8 9 5 naked single 64 541 6 7 1 5 row 64 542 8 6 6 8 naked single 64 543 8 2 9 3 row 65 544 6 7 2 7 row 65 545 6 4 1 7 col 65 546 8 3 9 9 naked single 66 547 6 7 3 8 row 66 548 6 9 2 9 row 66 549 6 6 6 7 col 67 550 6 6 5 1 row 68 551 6 6 9 2 row 68 552 6 8 5 2 col 68 553 6 5 4 2 box 69 554 6 7 4 4 col 70 555 6 8 6 9 naked single 70 556 6 8 7 4 box 70 557 8 7 1 1 naked single 71 558 6 5 7 3 naked single 71 559 6 7 5 3 naked single 71 560 6 7 7 9 row 71 561 6 3 4 1 col 71 562 6 6 8 4 box 72 563 1 5 2 8 naked single 72 564 3 9 5 6 naked single 72 565 3 5 6 1 col 72 566 6 4 7 6 naked single 72 567 6 6 2 6 naked single 72 568 6 7 9 6 naked single 72 569 6 9 5 5 naked single 72 570 6 9 7 1 naked single 72 571 6 4 3 3 row 72 572 6 7 6 1 row 72 573 6 9 9 3 row 72 574 8 4 2 7 naked single 72 575 8 4 1 3 row 73 576 1 2 3 8 box 73 577 3 2 4 6 row 73 578 3 5 4 3 box 73 579 3 1 9 5 diagonal 73 580 8 4 3 8 naked single 73 581 8 7 2 4 naked single 73 582 8 7 3 7 row 73 583 8 3 1 8 col 74 584 1 4 4 8 naked single 74 585 1 5 3 1 naked single 74 586 1 8 3 2 naked single 74 587 1 8 6 3 row 74 588 1 1 3 3 col 74 589 1 8 4 5 col 74 590 3 2 6 5 row 74 591 3 5 7 8 row 74 592 3 3 7 6 diagonal 74 593 6 9 6 6 naked single 74 594 6 4 6 8 col 74 595 8 5 3 4 row 75 596 1 1 1 7 naked single 75 597 1 7 6 7 naked single 75 598 1 8 2 4 naked single 75 599 1 4 5 6 row 75 600 1 6 2 2 row 75 601 1 7 1 5 row 75 602 1 7 5 8 row 75 603 1 9 1 1 col 75 604 1 7 3 6 col 75 605 1 3 5 3 col 75 606 1 3 6 6 col 75 607 3 2 2 4 naked single 75 608 3 5 5 9 naked single 75 609 3 2 5 2 row 75 610 3 2 7 3 row 75 611 3 5 2 5 row 75 612 3 8 8 1 diagonal 75 613 3 4 6 2 diagonal 75 614 6 4 5 4 naked single 75 615 8 6 3 2 naked single 75 616 8 5 4 2 row 76 617 1 1 5 2 naked single 76 618 1 3 2 1 naked single 76 619 1 4 1 4 naked single 76 620 1 6 6 4 naked single 76 621 1 7 2 3 naked single 76 622 1 1 8 6 row 76 623 1 3 8 2 row 76 624 1 2 2 6 col 76 625 1 9 6 2 col 76 626 3 3 1 8 naked single 76 627 3 5 3 6 naked single 76 628 3 8 2 7 naked single 76 629 3 8 1 6 row 76 630 3 8 6 9 row 76 631 3 1 1 2 col 76 632 3 1 2 6 col 76 633 3 4 3 9 col 76 634 3 1 4 9 col 76 635 3 7 8 6 col 76 636 3 7 2 9 box 76 637 8 6 4 3 naked single 76 638 8 5 7 3 row 76 639 10 2 9 5 naked single 76 640 10 3 9 2 row 77 641 1 3 9 8 naked single 77 642 1 4 2 7 naked single 77 643 1 9 5 4 naked single 77 644 1 3 7 5 row 77 645 1 4 9 9 row 77 646 1 5 8 4 row 77 647 1 9 2 9 col 77 648 1 6 3 9 box 77 649 3 1 3 1 naked single 77 650 3 3 2 3 naked single 77 651 3 4 2 1 naked single 77 652 3 7 1 5 naked single 77 653 3 7 7 7 naked single 77 654 3 8 7 2 naked single 77 655 3 9 2 8 naked single 77 656 3 1 6 3 row 77 657 3 7 4 2 row 77 658 3 8 4 5 row 77 659 3 8 9 8 row 77 660 3 9 4 7 row 77 661 3 4 4 8 col 77 662 3 3 5 4 col 77 663 6 1 1 6 row 77 664 6 2 1 8 row 77 665 6 8 3 6 col 77 666 8 5 5 9 naked single 77 667 8 6 7 6 naked single 77 668 8 5 1 5 row 77 669 8 6 5 5 col 77 670 10 2 8 6 row 78 671 1 4 8 3 naked single 78 672 1 5 7 7 naked single 78 673 1 6 9 1 naked single 78 674 1 9 3 7 naked single 78 675 1 5 5 5 row 78 676 1 6 7 8 row 78 677 1 6 8 5 col 78 678 1 2 9 3 col 78 679 3 1 5 8 naked single 78 680 3 3 6 7 naked single 78 681 3 4 5 7 naked single 78 682 3 7 9 4 naked single 78 683 3 8 3 4 naked single 78 684 3 9 6 4 naked single 78 685 3 7 6 8 row 78 686 3 9 3 2 row 78 687 6 1 2 4 naked single 78 688 6 8 1 1 naked single 78 689 6 2 3 2 row 78 690 6 5 2 8 row 78 691 6 9 1 2 col 78 692 6 5 3 1 col 78 693 8 5 2 6 naked single 78 694 8 6 1 9 naked single 78 695 8 9 1 6 col 78 696 8 9 2 9 col 78 697 10 3 8 9 naked single 79 698 1 2 7 1 naked single 79 699 1 2 8 7 naked single 79 700 1 6 5 7 naked single 79 701 6 5 1 4 naked single 79 702 6 9 3 4 naked single

The solution:
https://www.dropbox.com/s/4h3t9879142urqz/Valentine_2019_solution.png?dl=0

Edit: url's and images redirected to dropbox

by **enxio27** » Mon Feb 11, 2019 2:19 pm

i love it! I'm looking forward to working this one.

by **Mathimagics** » Mon Feb 11, 2019 2:34 pm

Wow! A Sudoku Magical Mystery Tour …

Excel/VBA must get a little sluggish when solving Gattai's of this size? But I suppose it is mostly singles so perhaps not so long ...

One suggestion - the diagonal marking spoils the appearance somewhat. Why not simply color the diagonals with the same color that you use for the Girandola extra house? Or any color at all, really.

by **Hajime** » Tue Feb 12, 2019 8:42 am

Mathimagics wrote:Excel/VBA must get a little sluggish when solving Gattai's of this size? But I suppose it is mostly singles so perhaps not so long ...

Exactly 1 minute to solve the puzzle, indeed singles only...
1.5 hours to generate the puzzle with the solution as input

Mathimagics wrote:One suggestion - the diagonal marking spoils the appearance somewhat

I agree. Not so aesthetic. The diagonal lines look like roses with thorns. Now it is pastel all over.

by **Mathimagics** » Tue Feb 12, 2019 12:09 pm

Nice!

by **Hajime** » Wed Feb 14, 2024 6:38 pm

Could not resist after 5 years. Another Symmetrical Singles Only Valentine 2024

Hidden Text: Show

The New Sudoku Players' Forum

Valentine 2019

Valentine 2019

Re: Valentine 2019

Re: Valentine 2019

Re: Valentine 2019

Re: Valentine 2019

Re: Valentine 2019 - 2024