SudokuGT
Greater-than sudoku: inequality signs instead of givens.
Greater-than sudoku: no givens, only inequality signs between neighbouring cells. Fill in 1–N per row, column and box so every inequality holds.
1<∧4<∧5∧2<∧6<∨8∨7>∨3<∧9∨8<∨9>∨6∨3<∧4<∧7∨2<∧5>∨1∧7>2<39>5>18>4<63<∧5<∧7∨4<∧9>∨6∨1<∧2<∧8∨9>∨6>∧1∧8>∨2<∨3∧5<∧7>∧4∨2<8>47>1<56<9>36<∨7>∨2∧1<∧3<∧4∧9>∨8>∨5∨4>∧1<∧8∧5<∧7<∧9∨3<∧6>∨2∧5>3<96<8>24>1<7