AL-FATTAAH-The Opener, The Judge The Supreme Solver

The One who opens all the doors of mercy, profit and sustenance to His slaves. The gate of the solution of every difficut can be easily opened by Him. He makes clear what is unclear. Al-Fattaah is the One who judges between His slaves with perfect justice. The One who opens for His slaves the closed worldly and religious matters.
Allah, Exalted be He, says, “And He is the All-Knowing Superb Arbiter.” (Surat Saba’, 34:26)
Al-Fattaah means the One who judges between His servants and “opens the doors of sustenance and mercy” as well as the One who “opens the hearts and minds” of His servants to the truth. This name also means the One who grants victory.
This He can do (1) through His decree pertaining to His universal will, which relates to whatever He decides His slaves should experience and go through, such as good and harm and richness and poverty, all in accordance with His foreknowledge and wisdom; (2) through His religious decree, which consists in the laws He has sent down to His Messengers; and (3) through His decree pertaining to reward and punishment, whereby He grants His righteous servants victory over their enemies and judges among His slaves on the Day of Judgement.

Benefits of belief in this name include the following:

Loving Allah and being attached to none but Him, for He is the One in whose Hand is the dominion of everything. Allah, Exalted be He, says, “Whatever Allah grants to men of His mercy, there is none to withhold it…” (Surat Faatir, 35:2)
Being assured of Allah’s victory and support which He grants His righteous servants.
Rejoicing that Allah has completed and perfected our religion and striving hard to strictly adhere to it.
Relying on Allah, submitting our will completely to Him and entrusting all our affairs to Him, for He is the One who can grant victory to His righteous servants through His decree pertaining to His universal will, whereby He gives them all that is good and keep them away from harm.
Fearing the day when we stand before Allah for the final judgement and avoiding wronging ourselves by disobeying Allah and wronging others.

The One who is the judge and revealer. The One who opens what is closed. The One who is the judge of what shall be opened.

The One by whose guidance that which was closed is opened and the unclear is made clear. The One who lifts veils and who opens the heart.

The One who unties the knots, and softens that which was hardened. The One who continually offers goodness and mercy. 

The One who gives victory. The One who opens the door to success. The One who holds the keys to victory and success. The One who reveals the solution to all problems.

From the root f-t-h  which has the following classical Arabic connotations

to open, unlock, unfold
to make victorious
to reveal, inform, explain, make clear
to judge, decide
to grant, permit

This name is used in the Qur’ān. For example, see 34:26

The name of first chapter of the Qur’ān, al-Fātiha, is based on this same root, and is generally translated as The Opener, or The Opening.

The Arabic word miftāhī, translated as key, meaning that which opens or unlocks, is also based on this same root.