You can try solving tricks in Janggi against the computer.
It contains 300 problems each for the 5th, 7th, 9th, 11th, 13th, 15th, and 17th moves, and 100 problems for the 19th move, for a total of 2,200 extended group problems.
You can check the answers by selecting the player against the computer.
For reference, in Janggi, there is a rule called "Big Jang," where if a king is in a "Daegung" (a situation where two kings are facing each other on the same line without any pieces), the king captures the king, resulting in a draw.
The images of the Janggi pieces and board are from https://github.com/Kadagaden/chess-pieces and are used under the CC-BY-4.0 license (https://github.com/Kadagaden/chess-pieces?tab=CC-BY-4.0-1-ov-file#readme).