Solution:
google/gemini-2.5-flash-lite
Guess
Reasoning
By systematically checking all dominoes from a double-six set, it is found that the 1-3 domino is the only one not present on the board.
Incorrect
openai/gpt-5.6-luna
Guess
Reasoning
Systematically checking the pip combinations from 0 through 6, every double-six domino appears except the 0-4 domino, which is absent from the board.
Correct