First post, still learning, always learning

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Gibbouslife

Oct 20, 2016

As the title suggests, this is my first post. Please excuse me as I'm learning and suspect I'll be learning the rest of my life. lol I suck, I know...maybe some more of the experienced players will get a kick out of our horrid play... So, I'm trying to figure out why a couple of my moves were considered blunders. My guess is the computer thinks they were dumb, and the ONLY reason it worked was because my opponent was a little more...inexperienced than I...??? The rest of the blunders/mistakes I understand. Moves 15 and 17 specifically. I had a plan... whereas he was concentrating on other things. Chess Game on Android - Chess.com [Event "wamgoham vs. Gibbouslife"] [Site " Chess.com"] [Date "Oct 20, 2016"] [White "wamgoham"] [Black "Gibbouslife"] [Result "0-1"] [WhiteElo "879"] [BlackElo "875"] [TimeControl "1 in 0 day"] [Termination "Gibbouslife won by checkmate"] 1. e3 c5 2. Qf3 d6 3. Bc4 e6 4. Ngh3 Nf6 5. g4 Nc6 6. g5 Nd7 7. Rg1 Nde5 8. Qf4 g6 9. Qe4 Bg7 10. Nf4 O-O 11. h4 Bd7 12. h5 Na5 13. b3 d5 14. Bxd5 exd5 15. Nxd5 Bb5 16. hxg6 fxg6 17. Rh1 Qxg5 18. f4 Qg4 19. Nc7 Qe2# 0-1

notmtwain

Oct 21, 2016

Gibbouslife wrote:

You will have more luck getting comments if you post your games using the Game Editor (the little chessboard icon in the comment box)

WIthout seeing the computer analysis, it's tough to tell exactly why it thought your moves 15 and 17 were blunders.

Normally, the computer judges blunders by comparing its evaluation of the position based on its suggestions for the best moves with your actual moves. The computer probably just thought that your moves threw away better opportunities. It usually judges moves assuming that the opponent would also play with purpose and wouldn't ignore your moves, the way your opponent did.

My computer says your move 15 ...Bb5 doesn't lose but the computer gives the position as -2.07 for black after the move whereas it evaluated its preferred move of 15 ...Bf5 as -5.11 for black. It compares the two and says that your move threw away that opportunity. Hence, it was judged a blunder.

On the other hand, my computer liked 17.. Qxg5 , evaluating the position as -9 for black. I can't imagine that the chess.com computer would have judged the move to be a blunder.

Perhaps you meant move 18, where the computer sees a mate in 4 (evaluation -99.99) with the best move 18.. Qg3+ but your move 18..Qg4 lets white off the hook with moves like Ne7+ and Nc3 stopping the immediate mate. That resulted in the evaluation dropping to -6.39, still winning but far worse than taking advantage of the mate in 4. Hence, blunder.

I don't know the exact cuttoff but the rule would be that a move that results in a negative evaluation change of 3 points or more is a blunder.