(Taken from this post in the ENWorld forum thread)

Here are the skills from the d20 SRD and their Microlite20 equivalents:

Simple one-on-one example
Here’s our thief Alex (HP 19, Melee +4 for 1d10+3, AC 15) sneaking up on an Orc wearing studded leather and wielding a falchion (HP 1d8+1=3, Melee +1 for 2d4+4, AC 13).

Alex tries to sneak up to the Orc: Roll 1d20+sub+DEX. 1+5+2 = 8. Not good. The Orc has to beat only 8 to spot him. He rolls 1d20+sub+MIND (1 from his 1 HD, 0 for MIND bonus) for 11+1 = 12, easily noticing Alex’s attempt to be a shadow.

But what do you expect when you roll a natural 1…

Let’s create a thief! Name: Alex. Class: Rogue. Race: Human. Level: 1. That was easy.

Roll 4d6: 5, 5, 2, 4. Drop 2 for a total of 14. Assuming this is above average, let’s assign this to DEX.

Roll another 4d6: 5, 2, 5, 6. Drop 2 for a total of 16. Damn! Should have used this for DEX. Doesn’t matter, however. We’ll use it for STR. This is going to be a master assassin!

Roll the last 4d6: 5, 5, 3, 3. Drop 3 for a total of 13. This must be my lucky day. Use it for MIND.

The 1st level adventurers have just completed a dungeon adventure, and defeated 5 EL1 encounters, an EL2 trap and the EL3 leader. That’s a total of EL10, so they all advance to level 2. They need to defeat another 20 Encounter Levels to reach Level 3.