Completely new to the game. I don't understand the scoring on cosumi.net

Hi, I don’t understand why I lose so high. I played it several times and don’t get it. I don’t understand why my oponent gets so much points. I lose by 26, like he wins the entire field.
Do I not own a territory? Can someone explain me, why the bot gets so much points?

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(;GM[1]FF[4]PB[You]PW[COSUMI]SZ[5]KM[0]RE[W+26]
;B[cc];W[dc];B[dd];W[cd];B[db];W[bc];B[ec];W[cb];B[dc];W[be]
;B[ad];W[ba];B[ce];W[bd];B[da];W[de];B[ed];W[ca];B[ee];W[ce]
;B[ab];W[bb];B[aa];W[ac];B[ab];W;B)

Black is dead everywhere, they cannot prevent White 5-1, Black 5-2, White 5-1 to capture the Black dragon

Playing against people on 9x9 or larger boards will both give more interesting games, and give you the chance to learn from your opponent

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thanks got it.

While this may be a specific case, you would do well to read up on the general concept of FALSE EYES

The short version is - your groups need 2 eyes to be unconditionally alive.

In your example above, white is unconditionally alive because it can capture the two threatening black stones and still retain liberties. Whereas (as Samkaru pointed out above) if white plays on either of black’s 2 remaining liberties, black can capture, reduce themselves down to 1 last remaining liberty, and then get captured completely.

False eyes are often tricky and difficult to spot. Check out all the various examples on the senseis.xmp.net page - it will take a while to get used to this aspect of the game, because you can run into lots of situations where you think you have plenty of room left to make two eyes, and then your opponent makes a couple of forcing moves and suddenly those options disappear.

Good luck!

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Before looking at False eyes, look at Two Eyes at Sensei's Library

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Also, games on a 5x5 board get a little bit crazy: in such a confined space, it’s hard to see what’s going on. You might have an easier time on 9x9.

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thanks a lot.