Pin
Core Lesson Objective: Before rushing active piece maneuvers or pawn promotions, apply Pin to extinguish the opponent's counterplay first.
Position 1: Pinning Black's Rook with Bc5! vs. the f5?! Misstep
Position 1 / 6
Mainline (9 Moves)
White plays Bc5!, applying the Pin principle by pinning Black's d6-rook along the a3-f8 diagonal against the e7-king, completely paralyzing the rook so Black cannot play Rd2+.
Black steps the king to d7 to unpin and defend the d6-rook.
White captures the rook with Bxd6!, removing the only piece protecting Black's advanced c3-pawn.
Black recaptures with Kxd6.
White slides the rook to c1!, directly attacking Black's isolated c3 passed pawn.
Black moves the king to c5 to defend the c3-pawn.
White captures the passed pawn with Rxc3+!, eliminating Black's counterplay with check.
Black steps the king to b4, attacking White's c3-rook and a5-pawn.
White plays Rc6!, defending the a5-pawn while attacking Black's a6-pawn and e6-bishop to secure a completely winning rook endgame up the exchange.
Alternative Path Available — Consider: Played in the Game: f5?!
In the game, the player blundered with f5?!. White was thinking about the standard rule of attacking a pinned piece with a pawn—using f5 to pile up on Black's e6-bishop, which is pinned to the e7-king along the e-file by White's e1-rook—but wasn't thinking about Black's unpinned d6-rook invading immediately with 38... Rd2+!, which drives White's king back and lets Black's c3-pawn march to the seventh rank.
Black strikes immediately with Rd2+!, invading the second rank with check to clear the path for the c3-pawn.
White steps the king out of check to g3.
Black captures on f5 with gxf5!, opening the kingside while keeping White's pieces tied down.
White recaptures with gxf5.
Black pushes c2!, advancing the passed pawn to the brink of promotion.
White retreats the bishop to e3 out of necessity to stop Black's c2-pawn from promoting and attack the d2-rook—even though placing the bishop on e3 blocks White's e1-rook and breaks White's own pin on Black's e6-bishop.
Black plays Rd3!, pinning White's e3-bishop against the g3-king while keeping the c2-pawn protected—and now that White's e3-bishop has broken the e-file pin, Black's e6-bishop is completely free to capture on f5 next!
White retreats the king to f2 to step out of the pin along the third rank.
Black captures the f5-pawn with Bxf5! Even though moving the bishop off e6 walks into a discovered attack (and even a double check from White's e3-bishop and e1-rook), Black has calculated that none of White's discovered or double checks can win a piece or stop the c2-pawn—the most White can get is a single pawn on h6.
White plays Bxh6+, using the discovered check from the e1-rook to grab the h6-pawn, since even double checks like Bg5+ or Bc5+ only force Black's king to step to d7 without winning any material.
Black steps the king out of check to d7, leaving Black with an unstoppable c2 passed pawn and a completely winning endgame.
Position 2: Pinning the Bishop on the g-File with Rg1! vs. the Nf4?! Blindspot
Position 2 / 6
Mainline (3 Moves)
White plays Rg1!, applying the Pin principle by pinning Black's g2-bishop along the open g-file against the g8-king. Because the bishop is pinned to the king and has no pawn or piece to defend it on g2, White wins the bishop by force.
Black pushes f5 to create breathing room for the king.
White captures the pinned bishop with Rxg2+!, emerging a full knight ahead with a completely winning endgame.
Alternative Path Available — Consider: Played in the Game: Nf4?!
In the game, the player blundered with Nf4?!. Despite having 2 minutes and 0.9 seconds remaining on a 3-minute clock, White spent just 1.8 seconds on this move (clock dropping from 2:00.9 to 1:59.1), instantly chasing the g2-bishop with the knight and overlooking the immediate g-file pin with Rg1!—which gives Black the time to trade off White's rook with checks and rescue the bishop.
Black plays Rc8+!, seizing the open file with check before White can capture on g2.
White steps the king to d2.
Black plays Rd8+!, checking the king on the d-file to force the trade of rooks.
White retreats the king to e1 so the king can recapture on d1.
Black trades rooks with Rxd1+.
White recaptures with Kxd1.
Black retreats the bishop safely to b7!, saving the piece and achieving complete equality.
Position 3: Relative Pin on the e-File with Qe2! vs. the Bf2?! Retreat
Position 3 / 6
Mainline (5 Moves)
White slides the queen to e2!, applying the Pin principle by pinning Black's e5-bishop along the e-file against Black's undefended e6-queen, while simultaneously adding a second attacker (queen and g3-bishop) to e5.
Black pushes a6, as Black cannot unpin the e5-bishop without leaving either the e6-queen or e5-bishop en prise (and if 37... Bxg3, White wins the queen with 38. Qxe6+).
White captures the pinned bishop with Qxe5!, winning a full piece.
Black trades queens with Qxe5.
White recaptures with Bxe5!, emerging a full bishop ahead in a completely winning endgame.
Alternative Path Available — Consider: Played in the Game: Bf2?!
In the game, the player blundered with Bf2?!. White was thinking about retreating the g3-bishop out of Black's reach and eyeing the a7-pawn, but wasn't thinking about how retreating the bishop releases all pressure on e5 and allows Black to push d4 with tempo.
Black advances d4!, creating a protected passed pawn and unpinning Black's central pieces.
White pushes a6, trying to create a passed pawn on the queenside.
Black repositions the bishop to c7, blockading the queenside dark squares and guarding a5.
White brings the queen to b4, attacking the d4-pawn.
Black centralizes the queen to e5!, defending the d4-pawn and threatening check on h2 to achieve complete equality.
Position 4: Absolute Pin on the f-File with Rf1! vs. the Bb4?! Retreat
Position 4 / 6
Mainline (7 Moves)
White plays Rf1!, applying the Pin principle by pinning Black's f5-knight along the f-file against the f6-king. Because the knight is absolutely pinned to the king, Black cannot move the knight and cannot defend it without losing the a2-rook's attack on a3.
Black captures the bishop with Rxa3, as stepping the king out of the pin with 37... Kg6 allows 38. Rxf5! Rxa3 39. Rxg5+ winning two pawns while keeping the extra piece.
White captures the pinned knight with Rxf5+!, regaining the piece immediately with check.
Black steps the king to e6 to attack the f5-rook.
White captures on g5 with Rxg5, winning Black's kingside pawn and creating a passed g-pawn.
Black captures on c3 with Rxc3.
White captures on b5 with Rxb5!, emerging two connected passed pawns ahead (d4 and g3) in a completely winning rook endgame.
Alternative Path Available — Consider: Played in the Game: Bb4?!
In the game, the player blundered with Bb4?!. White was thinking one-sidedly about retreating the attacked a3-bishop to safety, but wasn't thinking about how leaving Black's f5-knight unpinned lets Black coordinate the rook and knight against White's exposed king on g4.
Black plays Rf2!, cutting off White's king and preparing a mating net with Nh6+ and g4+.
White activates the rook to e4 to guard the fourth rank.
Black leaps in with Nh6+!, driving White's king onto the h-file.
White steps the king to h3, the only legal square.
Black pushes g4+!, forcing White to give up the rook for the pawn because stepping the king to h4 is met by Rh2#.
White is forced to capture with Rxg4, or be mated immediately after 40. Kh4 Rh2#.
Black recaptures with Nxg4.
White recaptures with Kxg4, eliminating the knight.
Black centralizes the king to g6, reaching a dead-drawn endgame where Black's active rook easily holds against White's bishop and pawns.
Position 5: Pinning the Bishop to the Back-Rank Rook with Re2! vs. the Ng6+?! Check
Position 5 / 6Mainline (5 Moves)
White slides the rook to e2!, applying the Pin principle by pinning Black's e5-bishop along the open e-file against Black's undefended e8-rook. Because moving the e5-bishop would allow Rxe8+ winning a full rook, Black's bishop cannot move to capture the f4-knight!
Black steps the king to h7 so the back rank is no longer a checkmate square.
White plays Nd3!, retreating the knight to attack the pinned e5-bishop a second time (with both knight and rook).
Black slides the rook to b8 to counterattack White's b3-pawn, as the pinned e5-bishop cannot be saved.
White captures the pinned bishop with Rxe5!, winning a full piece and securing a completely winning endgame.
Alternative Path Available — Consider: Played in the Game: Ng6+?!
In the game, the player blundered with Ng6+?!. White was thinking that evacuating the attacked f4-knight with check would attack the e5-bishop and force a favorable trade, but wasn't thinking about the fact that trading the knight for the bishop lets Black recapture with the rook and completely escape the e-file pin.
Black steps the king out of check to h7, attacking the g6-knight.
White captures the bishop with Nxe5.
Black recaptures with Rxe5!, activating the rook in the center of the board with material completely equal.
White retreats the rook to c3 to defend the b3-pawn.
Black centralizes the rook to e4, achieving complete equality in the pure rook endgame.
Position 6: Inducing an Absolute Pin with Qh8+! vs. the Rc4?! Rook Attack
Position 6 / 6Mainline (3 Moves)
White strikes with Qh8+!, applying the Pin principle by checking Black's h6-king along the h-file and forcing Black's g7-rook onto h7, where it is pinned to the king and deflected from defending the d4-queen.
Black is forced to interpose with Rh7, stepping into an absolute pin along the h-file and abandoning the defense of d4.
White captures the undefended queen with Qxd4!, winning Black's queen for nothing and securing an easily winning position.
Alternative Path Available — Consider: Played in the Game: Rc4?!
In the game, the player blundered with Rc4?!. White was thinking about attacking Black's d4-queen with the rook to drive it off its central square, but wasn't thinking about Black's immediate checking resources on d1 and d6, which let the queen escape with tempo and step the king out of the h-file pin.
Black plays Qd1+!, escaping the c4-rook's attack by delivering check on the back rank.
White steps the king out of check to h2.
Black follows up with Qd6+!, delivering a second check to buy time for the king to unpin.
White blocks the check with g3.
Black steps the king safely to h7!, stepping off the h6-square so Qh8+ is no longer possible and achieving complete equality.
All 6 positions and 86 board frames in Pin (1400-1599 ELO bracket • Tactician / Attacker archetype) have been verified with Stockfish at a minimum depth of 20 plies to illustrate the core theme of Pin: "Before rushing active piece maneuvers or pawn promotions, apply Pin to extinguish the opponent's counterplay first." Developed and verified by David Phillips.
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