You are playing the Regex Pattern Matcher game against o1 - (high).

Game history:
Turn 1: o1 - (high) proposed text with target items: ["alice.smith+tag@sub.domain.co.uk","bob@domain.com","(123) 456-7890","+1 234 567 8901","123-456-7890","2023-06-15","06/15/2023","15.06.2023","192.168.1.1","127.0.0.1","#FF5733","#F3A","www.example.com","sub.domain.co.uk"]
Current turn: 1 of 10
You are the SOLVER.

Your opponent has provided the following challenge:

Text: "Welcome to the ultimate regex challenge!

1) Valid Emails:
 - alice.smith+tag@sub.domain.co.uk
 - bob@domain.com

2) Invalid Emails:
 - d@.com
 - some@@domain.com

3) Valid Phone Numbers:
 - (123) 456-7890
 - +1 234 567 8901
 - 123-456-7890

4) Invalid Phone Numbers:
 - (12)3-456-7890
 - 123456789
 - +1 2345 678 901 23

5) Valid Dates:
 - 2023-06-15
 - 06/15/2023
 - 15.06.2023

6) Invalid Dates:
 - 29-02-2023 (not a leap year)
 - 13/13/2023
 - 0000-00-00

7) Valid IPv4 Addresses:
 - 192.168.1.1
 - 127.0.0.1

8) Invalid IPv4 Addresses:
 - 256.100.100.100
 - 192.168.1
 - 10.20.30.999

9) Valid Hex Color Codes:
 - #FF5733
 - #F3A

10) Invalid Hex Color Codes:
 - #ZZ1234
 - #12345

11) Valid Domain Names:
 - www.example.com
 - sub.domain.co.uk

12) Invalid Domain Names:
 - domain..com
 - http://.com

Good luck, you'll need it!"

You need to create a regular expression pattern that matches EXACTLY these items in the text:
[
  "alice.smith+tag@sub.domain.co.uk",
  "bob@domain.com",
  "(123) 456-7890",
  "+1 234 567 8901",
  "123-456-7890",
  "2023-06-15",
  "06/15/2023",
  "15.06.2023",
  "192.168.1.1",
  "127.0.0.1",
  "#FF5733",
  "#F3A",
  "www.example.com",
  "sub.domain.co.uk"
]

Rules:
1. Your regex must match ALL of the target items in the text.
2. Your regex must NOT match anything else in the text.
3. The pattern should be a valid JavaScript regular expression.
4. Do not include the leading and trailing slashes or flags in your pattern.

You'll use the "make_move" function to submit your solution with:
1. reasoning: Your reasoning for this regex pattern
2. move: The regex pattern as a simple string

Example of what the function parameters should include:
- reasoning: "This pattern matches email addresses by using..."
- move: "[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}"

IMPORTANT:
- The regex pattern should be a simple string.
- Do NOT use raw regex notation with slashes like /pattern/.
- Do NOT escape characters unless they need to be escaped in the regex itself.
- For example, to match parentheses, use "\(\)" not "\\(\\)".
- When your pattern contains backslashes, each backslash itself in the string should be a single backslash, not doubled.

Think carefully and test your pattern mentally before submitting.