Pips : October 20, 2026

1. R1: less 2 · r1c4
2. R2: sum 7 · r2c3, r2c4
3. R3: less 3 · r3c1
4. R4: equals · r3c2, r3c3
5. R5: equals · r4c2, r4c3, r5c3
6. R6: empty · r5c4

sum = target total; equals = same value; unequal = all different values; less = total below target; greater = total above target; empty = no constraint. D labels identify dominoes; R labels identify regions.

Rows and columns below start at 1, from the top left.

1. 3–4: row 3, column 3 → row 2, column 3
2. 1–1: row 4, column 2 → row 4, column 3
3. 4–1: row 5, column 4 → row 5, column 3
4. 0–3: row 1, column 4 → row 2, column 4
5. 3–1: row 3, column 2 → row 3, column 1

1. R1: sum 5 · r1c1, r2c1
2. R2: sum 6 · r1c2
3. R3: sum 0 · r1c3
4. R4: empty · r1c4
5. R5: sum 7 · r2c2, r2c3, r3c3
6. R6: empty · r2c4
7. R7: sum 3 · r3c1
8. R8: equals · r3c2, r4c2, r4c3
9. R9: greater 4 · r3c4

sum = target total; equals = same value; unequal = all different values; less = total below target; greater = total above target; empty = no constraint. D labels identify dominoes; R labels identify regions.

Rows and columns below start at 1, from the top left.

1. 2–6: row 1, column 1 → row 1, column 2
2. 2–0: row 1, column 4 → row 1, column 3
3. 4–3: row 2, column 4 → row 2, column 3
4. 0–3: row 3, column 2 → row 3, column 1
5. 0–0: row 4, column 2 → row 4, column 3
6. 1–3: row 2, column 2 → row 2, column 1
7. 3–5: row 3, column 3 → row 3, column 4

1. R1: sum 3 · r1c1
2. R2: greater 8 · r1c2, r1c3
3. R3: greater 4 · r1c5
4. R4: empty · r1c8
5. R5: sum 5 · r2c1
6. R6: equals · r2c5, r3c5, r4c5
7. R7: greater 2 · r2c8
8. R8: sum 8 · r3c1, r4c1
9. R9: sum 0 · r3c2
10. R10: equals · r3c8, r4c7, r4c8
11. R11: empty · r4c6
12. R12: empty · r5c1
13. R13: greater 1 · r6c3
14. R14: sum 10 · r6c7, r7c7, r8c7
15. R15: less 2 · r7c3
16. R16: sum 3 · r8c3
17. R17: greater 2 · r9c3
18. R18: sum 4 · r9c4
19. R19: sum 3 · r9c5
20. R20: sum 0 · r9c7
21. R21: sum 5 · r9c8, r9c9

sum = target total; equals = same value; unequal = all different values; less = total below target; greater = total above target; empty = no constraint. D labels identify dominoes; R labels identify regions.

Rows and columns below start at 1, from the top left.

1. 5–3: row 2, column 1 → row 1, column 1
2. 4–1: row 4, column 1 → row 5, column 1
3. 6–2: row 2, column 8 → row 1, column 8
4. 0–4: row 3, column 2 → row 3, column 1
5. 6–5: row 1, column 5 → row 2, column 5
6. 0–3: row 9, column 7 → row 8, column 7
7. 2–1: row 6, column 3 → row 7, column 3
8. 3–4: row 9, column 5 → row 9, column 4
9. 2–5: row 7, column 7 → row 6, column 7
10. 5–5: row 3, column 5 → row 4, column 5
11. 4–5: row 1, column 2 → row 1, column 3
12. 3–3: row 8, column 3 → row 9, column 3
13. 2–3: row 9, column 8 → row 9, column 9
14. 1–1: row 3, column 8 → row 4, column 8
15. 1–0: row 4, column 7 → row 4, column 6