2/2 trample deathtouch blocked by 2/2 caused player damage
Had a 1/1 tiny bones pickpocket (w/ +1/+1 counter) given trample by bear mount blocked by a 2/2 Stubborn Burrowfiend.
Should have blocked completely and no player damage triggered however the Tiny Bones action triggered after combat.
Should not have triggered player damage. Lost a draft game because of it.
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DAC169#34537 commented
Deathtouch means any damage it deals will kill a creature, so only 1 damage is needed.
Trample means any excess damage dealt by attacking creature to defending creature(s) continues on to targeted player/planeswalker/battle.
So a 2power creature with both deathtouch and trample being blocked by 1 creature will deal 1 damage to the creature which kills it, then the 1 extra damage will be dealt to the player.