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Analysis: sio382 vs erivera90

Date: 2026.03.29 | Event: Live Chess | Site: Chess.com
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Evaluation

-8 -4 +0 +4 +8 1 5 10 15 20 25 30 35 40 45 50 f5 (+3.5) Blunder Rde8 (+6.4) Blunder
Your moves Opponent moves

Found 2 crucial moments.

Moment 1 — Blunder MINOR ↗

Pin 
r n . q n r k .
p p p . p p b .
. . . . . . p p
. . . . P . . .
. . P . . . . .
. . N B . Q . .
P P . . . P P P
R . B . R . K .
FEN: rn1qnrk1/ppp1ppb1/6pp/4P3/2P5/2NB1Q2/PP3PPP/R1B1R1K1 b - - 0 11
You Played: f5
Engine Best: Nc6
Eval Swing: -209 cp
Variation: Nc6 Bf4 e6 Rad1
Refutation: exf6 Nxf6

Coach Explanation

f5 weakens the pawn structure and allows exf6 Nxf6, opening lines for the opponent's attack. Nc6 is superior as it develops a piece, prepares to challenge the center with e6, and the refutation line after Nc6 ends at Rad1, indicating a more solid position. The pin of the Knight on f6 is not considered in the evaluation.

Moment 2 — Blunder MAJOR ↗

Discovered Attack 
. . . r . r k .
p p . . . . b .
. . . . . p p p
. . P N . n . .
. . B . . . . .
. . . . . P . .
P P . . . P . P
R . . . R . K .
FEN: 3r1rk1/pp4b1/5ppp/2PN1n2/2B5/5P2/PP3P1P/R3R1K1 b - - 1 19
You Played: Rde8
Engine Best: Nh4
Eval Swing: -467 cp
Variation: Nh4 Re3 Kh8 b4
Refutation: Nc7+ Kh7 Rxe8 Rxe8

Coach Explanation

Rde8 is a mistake because after Nc7+ Kh7 Rxe8 Rxe8 White wins material. Nh4 is superior, creating a discovered attack and threatening Re3, while also allowing time for Kh8 and b4.

Recurring Patterns


Across the last few games, erivera90 continues to struggle with tactical oversights. This game features errors related to pawn structure weakness and missed discovered attacks, which have been recurring themes. Based on the cross-game history, vulnerabilities to pins, positional understanding, and hanging pawns are the most frequent problem areas. The blunder in this game involving a pin is consistent with past performance.

Annotated PGN

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[Event "Live Chess"] [Site "Chess.com"] [Date "2026.03.29"] [White "sio382"] [Black "erivera90"] [Result "1-0"] 1. d4 {+0.29} Nf6 {+0.25} 2. c4 {+0.28} g6 {+0.41} 3. Nc3 {+0.28} Bg7 {+0.56} 4. e4 {+0.54} d6 {+0.46} 5. Nf3 {+0.46} h6 {+0.95} 6. Bd3 {+0.62} O-O {+0.87} 7. e5 {-0.02} dxe5 {-0.12} 8. dxe5 {-0.25} Ne8 {+1.10} 9. O-O {+0.37} Bg4 {+0.34} 10. Re1 {+0.16} Bxf3 {+1.39} 11. Qxf3 {+1.34} f5 $4 {+3.54 Pin · exf6} 12. exf6 {+3.79} exf6 {+4.93} 13. Bf4 {+2.98} Nd6 {+5.14} 14. c5 {+4.50} Nf5 {+5.62} 15. Nd5 {+3.35} Nc6 {+4.66} 16. Bxc7 {+2.27} Ncd4 {+3.62} 17. Bxd8 {+2.76} Nxf3+ {+2.67} 18. gxf3 {+2.65} Raxd8 {+3.31} 19. Bc4 {+1.88} Rde8 $4 {+6.39 Discovered Attack · Nc7+} 20. Nc7+ {+6.38} Rf7 {+9.52} 21. Nxe8 {+8.25} Bf8 {+8.88} 22. Bxf7+ {+6.50} Kxf7 {+6.58} 23. Nd6+ {+6.78} Kg8 {+8.60} 24. Nxf5 {+9.20} Bxc5 {+10.15} 25. Nxh6+ {+9.56} Kg7 {+10.16} 26. Ng4 {+10.39} f5 {+10.53} 27. Ne5 {+9.84} Kf6 {+12.39} 28. Nd7+ {+12.76} Kf7 {+13.06} 29. Nxc5 {+14.26} b6 {+14.31} 30. Nd3 {#7} b5 {#7} 31. Rad1 {+14.08} a5 {#5} 32. b3 {+13.63} b4 {#5} 33. f4 {+18.55} Kf6 {+40.86} 34. Rc1 {#6} Kg7 {#4} 35. Rc5 {#6} Kf6 {#5} 36. Rxa5 {#5} g5 {#5} 37. fxg5+ {#14} Kxg5 {#5} 38. Nxb4 {#6} Kf4 {#6} 39. Nd3+ {#5} Kf3 {#2} 40. Re3+ {#3} Kg4 {#3} 41. Rxf5 {#9} Kxf5 {#9} 42. a4 {#8} Kg4 {#7} 43. a5 {#7} Kf5 {#7} 44. a6 {#6} Kf6 {#6} 45. a7 {#5} Kf7 {#5} 46. a8=Q {#4} Kf6 {#3} 47. Qf8+ {#2} Kg5 {#2} 48. Rg3+ {#1} Kh4 {#1} 49. Rg8 {#2} Kh3 {#1} 50. Qh6# {#-0} 1-0