Solution:
google/gemini-2.5-flash-lite
Guess
Reasoning
After systematically listing all visible dominoes and comparing them to a complete double-six set, the domino [0, 5] is the only one not present on the board.
Incorrect
openai/gpt-5.6-luna
Guess
Reasoning
After cataloging the 27 dominoes on the board and comparing them with all 28 combinations in a double-six set, every pair appears except the 1-5 domino.
Correct
meta/muse-spark-1.2-contributor
Guess
Reasoning
The board shows 27 dominoes. Counting the 0-value (blank) halves there are only 7 instead of the 8 required for a complete double-six set (0-0 contributes 2), s...
Incorrect
qwen/qwen3.8-flash
Guess
Reasoning
By systematically scanning the board and listing all the dominoes present, we can identify the missing one. The board contains all combinations of pips from 0 t...
Incorrect