Hard Puzzles
These are the "hard" puzzles, midway in difficulty between the
Standard Puzzles and the
Advanced Puzzles. Like the advanced puzzles,
you need to apply an "advanced" technique, but not to the same extent as
the advanced puzzles.
The puzzles are available in printable form as PDF files.
Each file contains 100 puzzles, with 2 puzzles per page.
If you really enjoy these puzzles, consider making a contribution to support
the continued existence of this web site. Click on the "Contribute to boldts.net"
icon at the left to make a $10 payment via PayPal. Think of how much you have to pay
for Sudoku books in the store. And think about how many puzzles you can download from
this site.
Index
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Answers
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#100
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#102
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#104
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#106
#107
#108
#109
#110
#111
#112
#113
#114
#115
#116
#117
#118
#119
#120
#121
#122
#123
#124
#125
#126
#127
#128
#129
#130
#131
#132
#133
#134
#135
#136
#137
#138
#139
#140
#141
#142
#143
#144
#145
#146
#147
#148
#149
#150
#151
#152
#153
#154
#155
#156
#157
#158
#159
#160
#161
#162
#163
#164
#165
#166
#167
#168
#169
#170
#171
#172
#173
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#175
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#177
#178
#179
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#181
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#184
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#192
#193
#194
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#197
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#200
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