#2 · Monday, 8 December 2025

Ladder answer

• ENTER 5 letters
• INTEGER 7 letters — adds two letters to the rung below
• ENERGETIC 9 letters — adds two letters to the rung below

ENTER sits inside INTEGER, which sits inside ENERGETIC — the two letters added at each rung are the whole puzzle. Scrambles shown that day: ETREN · ETIRNEG · CGEENERTI.

LockCode answer: 4729

The clues and what each one tells you:

1. 9712: 1 in the right place, 2 in the wrong place — 3 of 9, 7, 1, 2 are in the code.
2. 1789: 2 in the right place, 0 in the wrong place — 2 of 1, 7, 8, 9 are in the code.
3. 1079: 1 in the right place, 1 in the wrong place — 2 of 1, 0, 7, 9 are in the code.
4. 4056: 1 in the right place, 0 in the wrong place — 1 of 4, 0, 5, 6 are in the code.
5. After all clues, 3 codes remain possible.

With 3 candidates left, a good second guess splits them by feedback so the third guess is forced. Read the LockCode strategy guide for the method.