Does participating in an online game of guessing the future constitute fortune-telling and divination? And does it prevent the acceptance of prayers for forty days, knowing that it was only for entertainment?

Claiming to know a person's future profession from their picture is a form of sorcery and divination, which is forbidden in Islamic law. Knowledge of the unseen belongs only to Allah Almighty, as He says: ﴿Say: None in the heavens and earth knows the unseen except Allah, nor do they perceive when they will be resurrected.﴾

Consulting diviners is forbidden, for the Prophet, peace and blessings be upon him, said: «Whoever comes to a diviner and asks him about something, his prayer will not be accepted for forty nights.» And if one believes him, he has disbelieved in what was revealed to Muhammad, peace and blessings be upon him. This is considered minor disbelief unless one believes that the diviner knows the unseen. Repentance from this is obligatory.

Sheikh Ibn Uthaymeen elaborated on the ruling of consulting diviners, categorizing it into sections: 1. Mere questioning: Forbidden. 2. Questioning with belief: Disbelief; because it contradicts Allah's saying: ﴿Say: None in the heavens and earth knows the unseen except Allah.﴾ 3. Questioning for testing: There is no harm in it. 4. Questioning to expose their inability and lies: This may be obligatory or desirable.

The meaning of prayer not being accepted is the loss of its reward, even though it suffices in fulfilling the obligation, as clarified by An-Nawawi.

One must be wary of modern forms of divination widespread under the guise of "personal analysis" through face reading, or palmistry and signature analysis.