A fixed chain can be supported by an active king

Tigran Petrosian — Boris Spassky · World Championship, Moscow · 1966.04.13

Complete legal positionLoading progress…

Decision position · Black to move

Pawn structure and mobility

White occupies none of d4, e4, d5, e5 with pawns and controls d4 with pawn attacks; Black occupies d5 with pawns and controls d4, e4 with pawn attacks. Black has 7 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: a2 by a3
Pawn chains: e3–f2; g2–h3

Black

Isolated pawns: a4
Doubled files: None
Passed pawns: None
Blocked ahead: a4 by a3
Pawn chains: g7–h6

Black's legal pawn moves: f6, f5, g6, g5, h5, c4, d4

Identify the chain's support

White's pawn chain on e3, f2 has f2 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

Black can currently move 5 of its 6 pawns legally (7 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

Once Black plays ...c4 and queens are exchanged, what compensates for the pair’s reduced flexibility?

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

Open narrated assignment →

Transfer the idea

Try it in a different setting.

Study as a curriculum →

A fixed chain can be supported by an active king

Tigran Petrosian — Boris Spassky · World Championship, Moscow · 1966.04.13

Complete legal positionLoading progress…

Decision position · Black to move

Pawn structure and mobility

White

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: a2 by a3
Pawn chains: e3–f2; g2–h3

Black

Isolated pawns: a4
Doubled files: None
Passed pawns: None
Blocked ahead: a4 by a3
Pawn chains: g7–h6

Black's legal pawn moves: f6, f5, g6, g5, h5, c4, d4

Identify the chain's support

White's pawn chain on e3, f2 has f2 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

Black can currently move 5 of its 6 pawns legally (7 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

Once Black plays ...c4 and queens are exchanged, what compensates for the pair’s reduced flexibility?

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

Open narrated assignment →

Transfer the idea

Try it in a different setting.

Study as a curriculum →