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Analysis: erivera90 vs Makar8avs

Date: 2026.04.02 | 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 Nf3 (-4.8) Blunder Be3 (+0.1) Missed Qxd8+ (+4.2) Missed Ra8+ (+0.1) Missed Kf2 (-3.4) Blunder
Your moves Opponent moves

Found 5 crucial moments (2 blunders, 3 missed opportunitys).

Moment 1 — Blunder MAJOR ↗

Pin 
r . b . k b . r
p p p . . p p p
. . . p . q . .
. . . P p . . .
. . . n P . . .
. . . . . . P .
P P . P . P B P
R . B Q K . N R
FEN: r1b1kb1r/ppp2ppp/3p1q2/3Pp3/3nP3/6P1/PP1P1PBP/R1BQK1NR w KQkq - 1 8
You Played: Nf3
Engine Best: d3
Eval Swing: -486 cp
Variation: d3 c5 Be3 Be7
Refutation: Bg4 Kf1 Bxf3 Bxf3

Coach Explanation

Nf3 is a mistake because of the immediate Bg4, followed by Kf1 Bxf3 Bxf3, losing material. d3 is superior as it prevents Bg4.

Moment 2 — Missed Opportunity MINOR ↗

Missed Skewer 
. . . . . b . r
p . . . k p . .
. . . p . q . .
. . . Q p . p .
. . . . P . P .
. . . P . b . p
P P . . . P . P
R . B . . R K .
FEN: 5b1r/p3kp2/3p1q2/3Qp1p1/4P1P1/3P1b1p/PP3P1P/R1B2RK1 w - - 0 18
You Played: Be3
You Could Have Played: Qb7+
Eval Swing: -217 cp
Variation: Qb7+ Ke8 Qc8+ Ke7
You could have played: Qb7+ Ke8 Qc8+ Ke7

Coach Explanation

You had a chance to play Qb7+, forcing the Black King to Ke8. Then, with Qc8+ the King is forced to Ke7. This skewer wins the undefended Rook on h8.

Moment 3 — Missed Mate CRITICAL ↗

Missed Back-Rank Mate 
Q . . q k b . .
p . R . . p . .
. . . p . . . .
. . . . p . p .
. . . . P . P r
. . . P B . . p
P P . . . P b P
R . . . . . K .
FEN: Q2qkb2/p1R2p2/3p4/4p1p1/4P1Pr/3PB2p/PP3PbP/R5K1 w - - 8 22
You Played: Qxd8+
You Could Have Played: Qc6+
Eval Swing: -9575 cp
Variation: Qc6+ Qd7 Qxd7#
You could have played: Qc6+ Qd7 Qxd7#

Coach Explanation

You had a chance to force a checkmate with Qc6+. Black would have been forced to play Qd7, and then you could have delivered checkmate with Qxd7#. You were very close to an elegant back-rank mate!

Moment 4 — Missed Opportunity MAJOR ↗

Missed back_rank_weakness 
. . . k . b . .
R . . . . p . .
. . . p . . . .
. . . . p . p .
. . . . P . r .
. . . P B . . p
P P . . . P b P
R . . . . . K .
FEN: 3k1b2/R4p2/3p4/4p1p1/4P1r1/3PB2p/PP3PbP/R5K1 w - - 0 24
You Played: Ra8+
You Could Have Played: f3
Eval Swing: -486 cp
Variation: f3 Bxf3+ Kf1 Bg2+
You could have played: f3 Bxf3+ Kf1 Bg2+

Coach Explanation

You had a chance to exploit Black's back rank weakness more decisively. While Ra8+ is a safe check, f3 immediately increases the pressure. If Black responds with Bxf3+, you could continue with Kf1 Bg2+, furthering your attack. This sequence offers a stronger advantage than simply checking on a8.

Moment 5 — Blunder MAJOR ↗

Skewer 
R . . . . b . .
. . . . k p . .
. . . p . . . .
. . . . p . p .
. . . . P . r .
. . . P B b . p
P P . . . . . P
R . . . . . K .
FEN: R4b2/4kp2/3p4/4p1p1/4P1r1/3PBb1p/PP5P/R5K1 w - - 0 26
You Played: Kf2
Engine Best: Kf1
Eval Swing: -348 cp
Variation: Kf1 Rg2 Rc1 Bg7
Refutation: Rg2+

Coach Explanation

King Kf2 is a mistake because it allows Rg2+, skewering the king and rook on a1. Kf1 is superior, leading to Kf1 Rg2 Rc1 Bg7.

Recurring Patterns


The most prominent error types continue to be positional miscalculations and failures to recognize pinning opportunities. This game contains missed skewers (24x total), missed checkmates (positional, 24x total), and tactical oversights related to back-rank weaknesses. These patterns align with previous games, where positional understanding and pins are the most frequently missed tactical opportunities. This game reinforces the established trend rather than deviating from it.

Annotated PGN

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[Event "Live Chess"] [Site "Chess.com"] [Date "2026.04.02"] [White "erivera90"] [Black "Makar8avs"] [Result "1-0"] 1. c4 {+0.06} d6 {+0.36} 2. Nc3 {+0.39} Nc6 {+0.78} 3. g3 {+0.27} Nf6 {+0.49} 4. Bg2 {+0.37} e5 {+0.37} 5. e4 {+0.09} Nd4 {+0.29} 6. Nd5 {-0.45} Nxd5 {-0.36} 7. cxd5 {-0.43} Qf6 {+0.02} 8. Nf3 $4 {-4.79 Pin · Bg4} Bg4 {-4.74} 9. O-O {-5.00} Nxf3+ {-4.86} 10. Bxf3 {-4.91} Bxf3 {-3.20} 11. Qa4+ {-3.30} c6 {-2.06} 12. dxc6 {-2.04} bxc6 {+3.20} 13. Qxc6+ {+3.37} Ke7 {+3.38} 14. Qxa8 {+2.92} g5 {+3.85} 15. Qd5 {+2.38} h5 {+3.31} 16. d3 {+2.51} h4 {+2.60} 17. g4 {+2.10} h3 {+2.34} 18. Be3 $6 {+0.09 Missed Skewer · best: Qb7+} Bg2 {+4.31} 19. Rfc1 {+4.13} Rh4 {#4} 20. Rc7+ {#3} Ke8 {#2} 21. Qa8+ {#2} Qd8 {#2} 22. Qxd8+ $4 {+4.25 Missed Mate in ? · best: Qc6+} Kxd8 {+4.47} 23. Rxa7 {+4.31} Rxg4 {+4.73} 24. Ra8+ $6 {+0.10 Missed back_rank_weakness · best: f3} Ke7 {+0.25} 25. f3 {+0.03} Bxf3+ {+0.07} 26. Kf2 $4 {-3.40 Skewer · Rg2+} Bg2 {+3.40} 27. Rg1 {+2.69} Ke6 {+4.84} 28. b4 {+3.74} d5 {+3.98} 29. Rxf8 {+4.06} dxe4 {+4.23} 30. dxe4 {+4.17} f5 {+5.57} 31. exf5+ {+5.84} Kd5 {+7.92} 32. b5 {+5.99} Re4 {+7.94} 33. b6 {+6.57} Rxe3 {+9.11} 34. Kxe3 {+10.29} Be4 {+34.24} 35. b7 {+40.39} g4 {#5} 36. b8=Q {#4} g3 {#3} 37. Rxg3 {#4} Bh1 {#2} 38. Rxh3 {#4} Kc4 {#3} 39. Rc8+ {#2} Kd5 {#2} 40. Qb5+ {#2} Kd6 {#2} 41. Qb6+ {#2} Ke7 {#1} 42. Rc7+ {#1} Kd8 {#1} 43. Qb8# {#-0} 1-0