Pencilwork: Hard Logic Puzzles

Pencilwork is a no-ads logic puzzle collection for people who solve with pencil marks: Killer Sudoku, Kakuro, Loop, Bridges and big Nonograms, each graded by the techniques it needs, with hints that name the technique. FIVE TYPES, FOUR LEVELS • Killer Sudoku: 9×9 Sudoku with sums in dashed cages • Kakuro: crossword-style sums with the digits 1 to 9 (also known as cross sums), 8×8 to 11×11 • Loop: draw one closed loop; each number counts the sides of its square the loop uses. 8×8 to 15×15 • Bridges: join every island into one group; each number says how many bridges meet it. 9×9 to 15×15 • Nonogram: big boards from 15×15 to 25×25, with hidden pictures and symmetric patterns Every type comes in Easy, Medium, Hard and Expert. GRADED BEFORE YOU START Each puzzle is graded by the hardest technique its solution needs, plus a score. A start card shows the grade before the clock runs, for…