I think you are confusing blundering with tactics.
Nope. Both were sacrificial exchanges that gives black great compensation.
See, if you notice, if black didn't use the sac to check white's king, then white would simply win the exchanges.
But the tactic of setting up the double attacks paid off for black because of the use of the check to keep the initiative needed to win the queen and later, the rook.
Howdy Chess Friends,
Here's a quickie example of how you can use a sneaky little tactical combination to stack the deck of the material, the position and ultimately...the entire game in your favor.
I was more than happy to execute this particular three move combination in the game once in a tight spot to win my opponent's queen when I needed it.
Then, when the very same combo worked again later in the game to win my opponent's rook with just two moves this time, I knew I was "onto something" and should share this one just in case you believe you can begin to look for opportunities to use it in your own games.
This should be particularly helpful for newer players or someone looking to break through the 1200 rating barrier by adding this tactical weapon to your middle game strategy repetoire.
(If you're above that level, then it should only be review of something you know.)
Just the two tactical shots I just described here were enough to lead to the "mate in 2" that ended the game for me.
1st Combo: Check out moves 14,15 and 16.
2nd Combo: Check out moves 27 and 28.
If this is a tactic you haven't used yet and you'd like to begin to use it in your own games, It may be a good idea to play through the two combos over and over until you're confident you know them well enough to use them in your own games.
Again, I don't expect anyone over the 1200 rating barrier to find this useful for anything but review, but I do hope it helps the newer player looking to improve.
Enjoy!