Some Sudoku Puzzles
LEVEL 1	1xxxx4xxxxx2x1x3 1xxx2xxxx14x3xxxxxx5xx3x4xxxx2xx65xx 12xx4xx3xxx2x1xxxxxx4xx5xxxxxx3x24x1 x89xxx51x2xxxxxxx9x3xxxxx2xxx35x87xxxxx6x9xxxxx73x21xxx9xxxxx4x6xxxxxxx5x58xxx26x
LEVEL 4	79xxxx3xxxxxxx69xx8xxx3xx76xxxxx5xx2xx54187xx4xx7xxxxx61xx9xxx8xx23xxxxxxx9xxxx54 2x41xxxxxxxx5x36x7xxx9xx4xx9xx4xxx1x65xx1xx74x2xxx8xx9xx9xx5xxx5x23x1xxxxxxxx41x2 xx8xx65xxxx91xx2xx8xx5x7x9xxxxxxx9xx53x4x17xx4xxxxxxx5x2x9xx3xx9xx75xxxx76xx2xx5 xx89xxxx17xx1x3x98xx3xxxx6xxxxx481xxx17xxx64xxx521xxxxx2xxxx8xx68x5x1xx75xxxx63xx x4xx69x582x6xxxxx7xx8xxxxxx3x9xx8x2x5xx1xx3xx8xx6xxx4xx8xxxx1x9xxxx8xx6x6xx475xxx
LEVEL 5	xxxx9x4x3xx3x1xx962xx64xxx74xx5xxx6xxx1xxx8xxx6xxx1xx21xxx74xx582xx6x7xx7x4x5xxxx 76xxxxxx53xxxx8xxxxxx3xx6xxxx392xxxxxxxx1xx8x2xx5xxx9x892xxxxxxx7xx562xxxxxxxxxx7
LEVEL 6	xxxxxxx3x5xxxx2x9xxxx4xx267xxxx9xx26xxx1x4xxx76xx3xxxx482xx3xxxx3x8xxxx9x1xxxxxxx x517xxxx9x6xxx3xxxxxx6xx7xx3xxxx61xxx8xxxxx6xxx79xxxx8xx6xx7xxxxxx2xxx4x8xxxx935x
LEVEL 7	xx4xxxx2x3x1xxx5xxx6x35xxxxxx36xx8xxx4xxxxx9xxx7xx42xxxxxx75x1xxx8xxx4x9x5xxxx6xx 5xxxxxx9xxxxxx237xxxxx83xx1xx2xxxxxxx693x482xxxxxxx6xx6xx97xxxxx318xxxxxx7xxxxxx5 xx19x8xx5xxxx5xxx9x2xxxxx3xxxx5x3x8xxx3x8x4xxx1x6x9xxxx8xxxxx2x3xxx2xxxx9xx3x41x8 8xxxx45xxx5283xxxxxxx9xxxx73xxxxxx2xx1x6x3x8xx7xxxxxx51xxxx8xxxxxxx4167xxx45xxxx8
LEVEL 10	xxxxx15xx6xx8xxxxx41xx3x2xxxx7xxx691xxxx2xxxx365xxx8xxxx1x5xx38xxxxx9xx7xx47xxxxx 9xx1x3x548xxx9x2xxxxxxxxx7xxxx5xx34xxxxxxxxxxx49xx7xxxx5xxxxxxxxx7x6xxx246x7x8xx9
LEVEL 12	x8xxx235x9xx6x5xxx6xxx7x2xxxx6xx1x7x5xxxxxxx4x7x5xx1xxxx4x3xxx9xxx2x9xx7x697xxx3x x8xx561xxxx572xxxx7xxxxxx96514x7xxx3xxxxxxxxx6xxx3x45224xxxxxx5xxxx972xxxx721xx4x x4x2385xxxx9xxx43xxxxxx9xxx56xxxxx2x93xx5xxx62xxx4xx5x176xxxxxx4xxxxxx68xx2xx7xx5
LEVEL 13	x13xxxxx8xx8x2xxxx76xxxx1xxx9x21xxx3xxx7x6xxx4xxx35x6xxx5xxxx31xxxx7x6xx1xxxxx85x
LEVEL 14	7xxx8xxx9xxx59xx1xxxxxx32xxx8x42xxxx4x7xxxxxxx658xxxxxxxxxxx32x9xxx317x4x2xxx8xxx x9xx4xx3xxx78xx41xxxxxx6xxxx1853xx9xxxxxxxxxxx3xx1782xxxx4xxxxxx76xx91xxx4xx2xx5x
LEVEL 15	x9xx2xxxxx8x5xxx91xx2x18x7xxx3xxxxx9xx5xxx6xx9xxxxx5xxx6x45x9xx43xxx7x5xxxxx6xx8x x93xxxxxx8xx5x36xxxxx7xxxx461xxxx35xxx8xxx1xxx49xxxx781xxxx2xxxxx69x8xx1xxxxxx48x
LEVEL 20
UNUSUALLY DIFFICULT (not much can be solved with deductions)	7xx98xxx5xxxxx2xx3xx6x7xxxxx1xx3x5x4x4xxxxx3x3x9x2xx1xxxxx4x2xx8xx1xxxxx5xxx69xx8
NASTIEST I'VE EVER SEEN but still solvable with deductions	xxxxx6xx24x57xx8xxxxx8x47x3xxxxxx4xx6x9xxx1x5xx1xxxxxx5x49x7xxxxx2xx83x99xx6xxxxx
IS THERE ONE SOLUTION (???)	xx4xxxx2x3x1xxx5xxx6x35xxxxxx36xx8xxx4xxxxx9xxx7xx42xxxxxx75x1xxx8xxx4x95xxxxx6xx 3xx1xx4xxx6xxxxx1xxxxxx9x632x9xxxxx5xxxx37xxxxx78xxxx6xx2xxx1xx14xxxxx2xxxxxx68xx
MADE UP and unsolvable	2xx5x4x3xxx6xxxxx88x9xxx2xxx2xx18xxxxxxxx7xxx1xxxxxxx43xxx2xx8xxx8x3xxx9x5xxxxxx7 x4x2x8xxxxx9xxx43xxxxxx9xxx56xxxxx2x9xxx5xxx62xxx4xx5xx76xxxxxx4xxxxxx68xx2xx7xx5

Make your own
2 x 2
3 x 2
3 x 3