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Analysis: cyyypp vs erivera90

Date: 2026.03.27 | Event: Live Chess | Site: Chess.com
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Evaluation

-8 -4 +0 +4 +8 1 5 10 15 20 Nf6 (+3.4) Blunder Nd4 (+100.0) Blunder
Your moves Opponent moves

Found 2 crucial moments.

Moment 1 — Blunder MAJOR ↗

Positional 
r . b q k . n r
p p . p p p b p
. . . . . . p .
. . p . n . N .
. . . . P . . .
. B N . . . . .
P P P P . P P P
R . B Q K . . R
FEN: r1bqk1nr/pp1pppbp/6p1/2p1n1N1/4P3/1BN5/PPPP1PPP/R1BQK2R b KQkq - 5 6
You Played: Nf6
Engine Best: h6
Eval Swing: -350 cp
Variation: h6 Nf3 Nc6 d3
Refutation: f4 Neg4 Bxf7+ Kf8

Coach Explanation

Nf6 is a mistake due to the refutation f4 Neg4 Bxf7+ Kf8. h6 is superior because it avoids this tactical sequence and leads to a more balanced position after Nf3 Nc6 d3.

Moment 2 — Blunder CRITICAL ↗

Back-Rank Mate 
r . b . . . k .
p p . . . . b p
. . . q n . p .
. . p N p . . .
. . . . P . . .
. . . P . Q B .
P P P . . . P P
. . K R . R . .
FEN: r1b3k1/pp4bp/3qn1p1/2pNp3/4P3/3P1QB1/PPP3PP/2KR1R2 b - - 1 18
You Played: Nd4
Engine Best: Ng5
Eval Swing: -9602 cp
Variation: Ng5 Qe3 Nf7 Kb1
Refutation: Qf7+ Kh8 Qe8+ Bf8

Coach Explanation

Nd4 is a blunder because it allows immediate checkmate. After Qf7+ Kh8 Qe8+ Bf8, White mates in 4. Ng5 is superior as it threatens the queen and forces White to deal with the threat, maintaining a playable position.

Recurring Patterns


This game highlights a continuation of tactical oversights present in erivera90's play. Previously, pin situations were a common error type; while not explicitly present, the missed defensive resource after Nf6 shows a similar miscalculation of tactical sequences. The blunder in this game with Nd4 is also a new tactical error. This game contributes to the increasing blunder rate seen across the most recent matches, demonstrating some backsliding.

Annotated PGN

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[Event "Live Chess"] [Site "Chess.com"] [Date "2026.03.27"] [White "cyyypp"] [Black "erivera90"] [Result "1-0"] 1. e4 {+0.36} c5 {+0.36} 2. Nf3 {+0.34} Nc6 {+0.48} 3. Nc3 {+0.23} g6 {+0.46} 4. Bc4 {-0.06} Bg7 {-0.04} 5. Ng5 {-0.85} Ne5 {-0.09} 6. Bb3 {-0.10} Nf6 $4 {+3.35 Positional · f4} 7. f4 {+3.54} O-O {+4.62} 8. fxe5 {+4.99} Ne8 {+5.11} 9. Nxf7 {+4.00} Rxf7 {+4.06} 10. Bxf7+ {+4.18} Kxf7 {+4.20} 11. Qf3+ {+4.17} Kg8 {+4.41} 12. Rf1 {+3.66} Nc7 {+4.03} 13. d3 {+3.31} e6 {+4.54} 14. Bf4 {+4.18} d6 {+5.36} 15. exd6 {+5.66} e5 {+6.81} 16. Bg3 {+4.53} Ne6 {+5.12} 17. O-O-O {+4.64} Qxd6 {+6.51} 18. Nd5 {+4.12} Nd4 $4 {#4 Back-Rank Mate · Qf7+} 19. Qf7+ {#3} Kh8 {#3} 20. Qe8+ {#2} Bf8 {#2} 21. Rxf8+ {+18.10} Qxf8 {#1} 22. Qxf8# {#-0} 1-0