Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 29°C. We apply continuously 170°C heat to the field 9x8
What is the temperature (rounded to whole numbers) in the field 9x8 after 72 iterations according to the Gauss-Seidel iteration

Field in the beginning

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

Field after 4 iterations (rounded after 4th iteration)

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	20	22	22	22	19	15	8
9	16	20	23	24	25	24	22	17	9
10	17	22	24	26	26	26	23	18	10
10	17	22	25	26	27	27	24	21	15
10	17	22	24	26	27	26	28	32	31
9	15	19	22	23	24	26	36	58	79
7	11	15	17	18	19	24	43	93	230
3	6	8	9	9	10	14	25	47	69

Temperature in field 9x8 after 72 iterations:

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	20	22	22	22	19	15	8
9	16	20	23	24	25	24	22	17	9
10	17	22	24	26	26	26	23	18	10
10	17	22	25	26	27	27	24	21	15
10	17	22	24	26	27	26	28	32	31
9	15	19	22	23	24	26	36	58	79
7	11	15	17	18	19	24	43	93	230
3	6	8	9	9	10	14	25	47	69

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	20	22	22	22	19	15	8
9	16	20	23	24	25	24	22	17	9
10	17	22	24	26	26	26	23	18	10
10	17	22	25	26	27	27	24	21	15
10	17	22	24	26	27	26	28	32	31
9	15	19	22	23	24	26	36	58	79
7	11	15	17	18	19	24	43	93	230
3	6	8	9	9	10	14	25	47	69

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	20	22	22	22	19	15	8
9	16	20	23	24	25	24	22	17	9
10	17	22	24	26	26	26	23	18	10
10	17	22	25	26	27	27	24	21	15
10	17	22	24	26	27	26	28	32	31
9	15	19	22	23	24	26	36	58	79
7	11	15	17	18	19	24	43	93	230
3	6	8	9	9	10	14	25	47	69