A mobile front is more than a pawn count

Korchnoi - Szabo, 1963

Complete legal positionLoading progress…

Decision position · White to move

Pawn structure and mobility

White occupies d5 with pawns and controls d4, d5 with pawn attacks; Black occupies e5 with pawns and controls d4, e5 with pawn attacks. White has 10 legal pawn move choices in this position. Pawn control is geometric, including pinned pawns; legal mobility accounts for king safety. Neither count is an engine evaluation.

White

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: d5 by d6
Pawn chains: c4–d5; e3–f2; g4–h3

Black

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: b7 by b6, d6 by d5, f7 by f6
Pawn chains: c7–d6–e5; g7–h6

White's legal pawn moves: c5, g5, e4, h4, a3, a4, b3, b4, f3, f4

Identify the chain's support

White's pawn chain on c4, d5 has c4 at its base. Test whether pressure on that support changes the advanced pawns' stability; piece placement and tactics determine whether a break works.

Study this pawn idea

Count legal pawn choices

White can currently move 7 of its 8 pawns legally (10 advance choices and 0 capture choices, counting promotion choices separately). More pawn moves do not by themselves mean a better position.

Study this pawn idea

Learn the plans behind these pawn structures →

Think before revealing

After exf4, which original pawn now occupies f4, and why is that useful?

Diagnose → choose → calculate → explain the transformation. Consider the opponent’s best resistance, not just the move you want them to make.

Your reasoning

What is the pawn situation?Your candidate and intended improvementOpponent’s reply; what changes after the final recapture?

4 · Reflect & return

Can you explain the gain, the concession and the opponent’s plan without reading the notes? Self-rate your understanding to schedule another look. This is a learning record, not an engine grade.

Sources & teaching context

Adapted from the supplied Pawn Play Atlas and Central Pawn Play materials. Unknown historical details remain unknown; illustrations are distinguished from full games.

Historical score / source 1

Transfer the idea

Try it in a different setting.

Study as a curriculum →

A mobile front is more than a pawn count

Korchnoi - Szabo, 1963

Complete legal positionLoading progress…

Decision position · White to move

Pawn structure and mobility

White

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: d5 by d6
Pawn chains: c4–d5; e3–f2; g4–h3

Black

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: b7 by b6, d6 by d5, f7 by f6
Pawn chains: c7–d6–e5; g7–h6

White's legal pawn moves: c5, g5, e4, h4, a3, a4, b3, b4, f3, f4

Identify the chain's support

White's pawn chain on c4, d5 has c4 at its base. Test whether pressure on that support changes the advanced pawns' stability; piece placement and tactics determine whether a break works.

Study this pawn idea

Count legal pawn choices

White can currently move 7 of its 8 pawns legally (10 advance choices and 0 capture choices, counting promotion choices separately). More pawn moves do not by themselves mean a better position.

Study this pawn idea

Learn the plans behind these pawn structures →

Think before revealing

After exf4, which original pawn now occupies f4, and why is that useful?

Diagnose → choose → calculate → explain the transformation. Consider the opponent’s best resistance, not just the move you want them to make.

Your reasoning

What is the pawn situation?Your candidate and intended improvementOpponent’s reply; what changes after the final recapture?

4 · Reflect & return

Can you explain the gain, the concession and the opponent’s plan without reading the notes? Self-rate your understanding to schedule another look. This is a learning record, not an engine grade.

Sources & teaching context

Adapted from the supplied Pawn Play Atlas and Central Pawn Play materials. Unknown historical details remain unknown; illustrations are distinguished from full games.

Historical score / source 1

Transfer the idea

Try it in a different setting.

Study as a curriculum →