Logic Masters Deutschland e.V.

Intro

At the end of 2020, the CTC Discord Server had it's first "Secret Santa" event, and after receiving the name "Stéphane", I Santa was excited to create a special puzzle for this pillar of the crazy sudoku ruleset community.  It's be a while since then, but I think the puzzle still holds up, so I wanted to share it as a bit of "Christmas in July".

Puzzle Rules

Place the digits 1-9 in each of the eight regions so that no digits repeat along any of the three axes, unless separated by the central open space.
For example, digits cannot repeat anywhere in row 3, but might repeat in the "e" and "t" regions of row 4.

Where an arrow appears in a cell with value N, the value of the adjacent cell in front of the arrow is 'shot' in that direction N spaces, bouncing against borders as it goes. When a digits impacts a wall dead-on (r1c1 affecting r2c2 in the example), it bounces straight back (180 degrees), otherwise it rebounds at a 60 degree angle. See example, where cells shaded in the same color must always contain the same value.

All possible arrows are given.

Each region contains an invisible thermometer which corresponds to the letter given in the region. See diagram for exact thermo shapes. This thermometer may exist anywhere within the region, with any rotation (but not reflection). Digits along this thermometer must increase from the bulb(s) to the tip(s).

Special notes on thermometers:

• The "é" region has a 1 cell thermomenter, which does not limit the digits of that cell, but must fit in a valid cell on the board, in proper orientation to the rest of the letter.
• In the "p" region themo, the cell on the right of the bulb must be less than the cell below the bulb.
• In the "a" region thermo, the cell immediately below the bulb acts as a valve. It must be greater than the bulb and its two adjacent thermo cells, but has no effect on the two 'legs' of the A.

Solve on Penpa+ (includes answer check, which checks numbers only)

Example (Penpa+ link)