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fabianocaruana vs MagnusCarlsen
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Game Snapshot
Nimzo-Indian Defense: St. Petersburg Variation
Crucial Positions
| move # | position | classification | ||
|---|---|---|---|---|
|
Move #:
36
Move:
Ba4
missed opportunity
Midgame missed stronger move (gap 173cp)
|
36 | Ba4 | missed opportunity | Midgame missed stronger move (gap 173cp) |
WHAT HAPPENED Move Played: Ba4 White played Ba4, moving the bishop from c2 to a4. The move neither defended the b2 pawn nor the h2 pawn, both of which were under direct rook threats (b8‑b2 and h8‑h2). White's own threats on d6 and f6 remained unchanged. Black immediately exploited the hanging b2 pawn with 36...Rxb2+, winning material and forcing the white king to move. WHY IT'S BETTER Engine suggested: Qe2 Engine suggested 36.Qe2. Qe2 simultaneously shields the h2 pawn (queen covers h2 along the second rank) and keeps the bishop on c2 where it continues to guard b2. The queen also stays active on the central files, preserving material balance and preparing counter‑play. By addressing the most urgent threats, Qe2 prevents the losing tactic that Ba4 allowed. KEY PRINCIPLE Defend immediate threats before launching your own ideas. |
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|
Move #:
39
Move:
Nc3
missed opportunity
Midgame missed stronger move (gap 173cp)
|
39 | Nc3 | missed opportunity | Midgame missed stronger move (gap 173cp) |
WHAT HAPPENED Move Played: Nc3 White played Nc3, shifting the knight from e4 to c3. This move did not stop Black's attacks on the c4 pawn, the d6 knight, nor the h2 pawn. The knight on c3 remained far from the critical squares, leaving the d6 knight vulnerable and the h2 pawn still under rook pressure. Black retained the initiative and later captured material. WHY IT'S BETTER Engine suggested: Nb5 Engine recommended 39.Nb5 (knight from d6 to b5). Nb5 retreats the attacked knight to a safe outpost while simultaneously creating counter‑threats against Black's c7 pawn and limiting Black's piece activity. It eliminates the immediate danger to the d6 knight, unlike Nc3 which left it hanging. KEY PRINCIPLE When a piece is under attack, retreat to a safe, active square that creates a counter‑threat. |
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|
Move #:
40
Move:
Rxf6
mistake
Midgame error compounded existing disadvantage
|
40 | Rxf6 | mistake | Midgame error compounded existing disadvantage |
WHAT HAPPENED Move Played: Rxf6 White captured on f6 with Rxf6, taking the black bishop. Although the capture wins a piece, it places the rook on f6 directly in line with Black's queen on b8 and rook on b2. Black responded with 40...Rb1+, delivering a back‑rank check that wins material. The move also left the d6 knight and e3 queen undefended, and did nothing to address Black's threats on c4 and d6. WHY IT'S BETTER Engine suggested: Bb5 Engine advised 40.Bb5, moving the bishop from a4 to b5. This keeps the rook on f1, preserving the back‑rank defense, while the bishop threatens key squares (c6, d7) and helps protect the c4 pawn. By maintaining piece coordination and avoiding exposure to a back‑rank check, White keeps material equality and retains defensive resources. KEY PRINCIPLE Never expose your back‑rank rook to a check; keep pieces coordinated before grabbing material. |
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Master Lens
What The GM Did Well By Phase
Opening
Middlegame