19th International Solving Contest (ISC)
29th January 2023
Results & Statistics
We had 38 tournaments in 26 countries and 601 solvers (+15 unofficial solvers in cat-3) – 181 solvers in cat-1, 172 solvers in cat-2 and 248 solvers in cat-3. Thank you to all local controllers for their excellent work and good cooperation and congratulations to the winners. If you find any mistakes in the tables (e.g. wrong written names, wrong gender, …) please let me know. I will correct such mistakes.
Special thanks to Borislav Gadjanski for his daily updates of the results on the MatPlus-website, to Miodrag Mladenovic who entered all results from those local controllers who did not use STM for this and also to Luc Palmans and Ivan Denkovski who helped a lot with the selection of the problems.– Axel Steinbrink, Central Controller of ISC 2023
Final results
Category 1 (181 solver) | Category 2 (172 solvers) | Category 3 (248 solvers)
Statistics ISC 2023 | ISC 2023 Studies-Analysis | ISC 2023 Winners | ISC 2023 TOP 100
Problems CAT1 – CAT2 – CAT3 | Solutions CAT1 – CAT2 – CAT3
ISC 2023 Winners
ISC 2023 winner
ISC 2023 Statistics
| Category | Category 1 | Category 2 | Category 3 | Total |
|---|---|---|---|---|
| Juniors (<23) | 36 | 90 | 248 | 374 |
| Seniors (>59) | 56 | 35 | 0 | 91 |
| Women | 6 | 27 | 62 | 95 |
| all | 181 | 172 | 248 | 601 |
| Oldest solver | Ioan Zaharie (ROU) | age 86 |
| Youngest solver | Samarth Kashyap P. (IND) | age 5 |
| Country | Tournaments | Category 1 | Category 2 | Category 3 | Total ISC 2023 |
|---|---|---|---|---|---|
| Belgium | 1 | 3 | 3 | 0 | 6 |
| Brazil | 1 | 1 | 2 | 0 | 3 |
| Czech Rep. | 1 | 8 | 5 | 6 | 19 |
| Denmark | 1 | 2 | 0 | 0 | 2 |
| Finland | 1 | 9 | 2 | 0 | 11 |
| France | 1 | 2 | 1 | 0 | 3 |
| Georgia | 1 | 4 | 0 | 0 | 4 |
| Germany | 1 | 5 | 3 | 0 | 8 |
| Great Britain | 2 | 4 | 1 | 0 | 5 |
| Greece | 2 | 6 | 9 | 4 | 19 |
| India | 2 | 20 | 47 | 89 | 156 |
| Israel | 1 | 9 | 7 | 3 | 19 |
| Japan | 1 | 14 | 2 | 2 | 18 |
| Latvia | 1 | 4 | 7 | 3 | 14 |
| Lithuania | 1 | 14 | 0 | 0 | 14 |
| Mongolia | 1 | 9 | 0 | 3 | 12 |
| Netherlands | 1 | 8 | 5 | 1 | 14 |
| North Macedonia | 1 | 6 | 12 | 3 | 21 |
| Poland | 3 | 8 | 21 | 14 | 43 |
| Romania | 3 | 13 | 24 | 9 | 46 |
| Russia | 4 | 0 | 0 | 90 | 90 |
| Serbia | 2 | 5 | 6 | 6 | 17 |
| Slovakia | 2 | 6 | 7 | 1 | 14 |
| Slovenia | 1 | 5 | 0 | 0 | 5 |
| Switzerland | 1 | 11 | 1 | 0 | 12 |
| Ukraine | 1 | 5 | 7 | 14 | 26 |
| Total | 38 | 181 | 172 | 248 | 601 |
BEL 
BEL 
BRA 
DEN 
GRE 
GRE 
IND-Bangalore 
IND-Chennai 
IND-Chennai 
ISR 
JPN 
JPN 
LAT 
LAT 
LTU 
LTU 
MGL 
POL-Wroclaw 
ROU-Cluj 
ROU-Cugir 
RUS-Arkhangelsk 
RUS-Moscow 
RUS-Moscow 
RUS-Tula 
SRB 
SUI 
UKR