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EloCoach Experiments · Chess.com · blitz

gmbenjaminbok (3120) vs demon64fields (2968)

1 October 2026 · gmbenjaminbok played white and won · Kings Indian Defense Fianchetto Debrecen Classical Main Line 8.e4 · game on Chess.com

Ratings here exceed 2600, Maia’s ceiling: its odds read these moves as a 2600 player would.

20...Nxd5

great · 20...Nxd5

Played
cxd5
Stockfish best
cxd5
Maia, played
46.2%
Maia, best
46.2%
Something wrong on this move? Report it
White’s winning chancesStockfish 19

Apollo’s review · unedited


Opening

Sound. Black stepped out of main book theory with 8...b6, allowing the central transformation 9.dxe5 dxe5.

The structure settled into an open d-file with symmetrical central pawns. White maintained harmonious piece placement, connecting the rooks and contesting key central squares without creating unnecessary structural targets.

9.dxe5 clarifies the central tension and opens the d-file for White's major pieces. (position after 9.dxe5)

Middlegame

The critical strategic decisions unfolded around the d5-square. After Black anchored a knight on d4, White accepted structural asymmetry to retain the initiative.

Move 21 — Structural Transformation

On move 21, Black captured on d5 with 20...Nxd5. Recapturing with 21.cxd5 applied the principle that pawn structure dictates plans. Rather than resolving tension passively, the capture created a protected passed pawn on d5 and opened the c-file.

21.cxd5 establishes a protected passed pawn and opens the c-file for counterplay. (position after 21.cxd5)

Black responded with 21...Ba6 and invaded on the dark squares with 22...Ne2+ and 23...Nc3. Rather than contorting to save the exchange, White recognized that a piece is worth what it can do, not its nominal value. White allowed the fork and played 24.Qb2, accepting the capture 24...Nxd1 25.Rxd1.

This exchange sacrifice surrendered material to eliminate Black's active knight while preserving the protected passed pawn, dark-square control, and the bishop pair.

25.Rxd1 accepts the exchange sacrifice in return for positional control and a passed pawn. (position after 25.Rxd1)

Move 29 — Fixing the Queenside

When Black sought counterplay on the kingside with 27...f5, White mobilized the knight to c4. After 28...Bxc4, White retook with 29.bxc4, reinforcing the d5-pawn, locking down the queenside, and depriving Black of light-square targets.


Turning Point

Black attempted to generate counterplay along the f-file with 30...Rf8 and 32...Rf6, but left their own back rank and queenside pieces without organic coordination.

Move 38 — Tactical Opportunism

After 36...Qf7 37.Bxe5 Bxe5, White played 38.Qxe5, restoring material parity while exposing Black's loose pieces.

38.Qxe5 attacks the e5-bishop and x-rays the undefended rook on b8. (position after 38.Qxe5)

The Queen on e5 exercised a dual threat: it reclaimed the minor piece and targeted the undefended rook on b8 along the b8-h2 diagonal. The only continuation preserving equality was 38...Re8, challenging the queen and protecting the back rank. Instead, Black committed the decisive blunder with 38...Kh7.

loose pieces drop off. The rook on b8 stood completely undefended, with no friendly piece covering the square. White immediately punished the oversight with 39.Qxb8, winning a full rook and terminating Black's resistance.

39.Qxb8 captures the hanging rook on b8 and settles the outcome. (position after 39.Qxb8)

Endgame & Conversion

Black launched a final tactical effort with 39...Rf2+ 40.Kg1 Qf3, threatening mate on g2.

White defended before counterattacking. 41.Qf4 offered a queen trade, shielding the king and neutralizing the attack. After 41...Qd3 42.Qxf2 Qxb1+ 43.Bf1 Qxe4 44.Qf7+, Black resigned. White remained a full rook ahead while Black's king had no safe shelter.


Strengths

  • Dynamic compensation: Surrendering the exchange on d1 demonstrated high-level positional judgment, valuing the d5 passed pawn and central bind over nominal point values.
  • Punishing loose pieces: The tactical sequence beginning with 37.Bxe5 and concluding with 39.Qxb8 capitalized immediately on Black's uncoordinated piece placement.

Areas to Work On

  • Prophylaxis against central invasion: Allowing Black's knight to settle on d4 and route to c3 required precise calculation to stay balanced. Restricting Black's active pieces earlier prevents conceding material concessions.

Coach's Verdict

A controlled performance at master level. The game was effectively decided when Black's tactical attempt on move 38 neglected the undefended rook on b8, though the foundation was laid on moves 21 through 25, where White secured sufficient long-term compensation to absorb Black's pressure.

The coach asks

When calculating 24.Qb2, did you evaluate the exchange sacrifice as an objective necessity against Black's knight invasion, or did you actively favor the resulting structure with the protected d5-pawn?

  • I evaluated it as dynamic compensation
  • Review the move 24 alternatives

Stockfish 19 at depth 12 and Maia-3 analysed every move on a phone. One Apollo coach call (google/gemini-3.8-flash) wrote the review above, which is published unedited. A script checked its board claims against every position in the game.

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