Du teamoj konkurencas en ĉi tiu tabulludo.

Because du means two, and nouns after numbers normally take the plural ending -j:

• teamo = a team
• teamoj = teams

So du teamoj = two teams.

It is not teamos because -os is a verb ending for the future tense, not a noun ending.

It is not teamojn here because -n marks the direct object, and du teamoj is the subject of the sentence, not the object.

The ending -j marks the plural in Esperanto.

Examples:

• tabulo = board
• tabuloj = boards
• teamo = team
• teamoj = teams

So teamoj simply means teams.

Konkurencas is the present-tense form of the verb konkurenci or konkuri-type meaning to compete. In Esperanto, present-tense verbs end in -as.

So:

• konkurencas = compete / are competing

Esperanto verbs do not change depending on the subject:

• mi konkurencas = I compete
• vi konkurencas = you compete
• ili konkurencas = they compete

That makes verb conjugation much simpler than in English.

It can mean either, depending on context.

Esperanto present tense -as often covers both:

• a general present: compete
• an action happening now: are competing

So Du teamoj konkurencas could mean:

• Two teams compete
• Two teams are competing

The surrounding context tells you which sounds best in English.

En usually means in.

Here it links the action to the game:

• konkurencas en ĉi tiu tabulludo = compete in this board game

So en is being used much like English in.

Ĉi tiu means this.

It is built from:

• tiu = that / that one
• ĉi = a particle that brings the meaning closer, giving this

So:

• tiu = that
• ĉi tiu = this

You may also see the reversed order:

• tiu ĉi

Both mean the same thing, though ĉi tiu is very common.

Because the phrase is the object of the preposition en, not a direct object of the verb.

After a preposition like en, nouns normally do not take the accusative -n just because they follow the preposition.

So:

• en ĉi tiu tabulludo = in this board game

You would use -n only in certain special cases, such as motion toward something or when grammar specifically requires it.

It is a compound word:

• tabulo = board
• ludo = game

Together, tabulludo means board game.

Esperanto often combines roots this way to make clear compound words.

In Esperanto compounds, the main roots are often joined directly, and the final grammatical ending of the first word is usually removed.

So:

• tabulo
  • ludo
• becomes tabul-ludo
• written as tabulludo

The l gets doubled because the first root ends in l and the second root begins with l.

This is normal and not a special extra rule just for this word.

The letter ĉ is pronounced like ch in church.

So:

• ĉi sounds roughly like chee
• tiu sounds roughly like tee-oo

Together, ĉi tiu is approximately chee TEE-oo.

A few helpful pronunciation points:

• ĉ = ch
• j sounds like English y
• u sounds like oo

Esperanto word order is fairly flexible, but this sentence uses a very natural, straightforward order:

• Du teamoj = subject
• konkurencas = verb
• en ĉi tiu tabulludo = prepositional phrase

So the sentence follows a pattern similar to English:

Two teams compete in this board game.

You could sometimes move parts around for emphasis, but the given order is the most neutral and beginner-friendly.

Yes, teamo can mean a team in a broad sense, including a sports team or a team in a game.

Its exact meaning depends on context.

In this sentence, because of tabulludo (board game), it clearly means the teams or sides within the game.

Because du already makes the noun specific enough in the basic sense: two teams.

Esperanto has only one article, la, meaning the, and it is used when something is definite.

Here, du teamoj works naturally without la, just like English two teams. If you said la du teamoj, that would mean the two teams, referring to specific teams already known from context.