# ChessMinds (chessminds.app)

> Pocket Grandmaster Chess Coach, 10-Tier Evidence-Verified Game Review, On-Device Stockfish 19, and Interactive Chess Encyclopedia for iPhone (iOS 27.0+), iPad (iPadOS 27.0+), and Mac (macOS 27.0+).

Last Updated: 2026-10-26
App Store: https://apps.apple.com/app/chessminds-chess-coach/id6782306460
Full Machine-Readable Chess Corpus: https://chessminds.app/llms-full.txt
XML Sitemap Index (1,314 Canonical URLs): https://chessminds.app/sitemap.xml

## Product Overview & Grounded AI Architecture
- **Companion Mentor**: Coach Otto (sea-otter chess mentor & sparring rival).
- **Local Engine**: On-device Stockfish 19 native neural evaluation (instant offline Multi-PV analysis on Apple Silicon).
- **Zero-Hallucination Coaching**: Every move is classified across 10 tiers (Book, Brilliant !!, Great !, Best, Excellent, Good, Inaccuracy ?!, Mistake ?, Miss, Blunder ??) using verified board evidence—material balance, pawn-structure geometry, tactical threats, and win-probability turning points—so the AI coach never invents illegal variations.
- **Four Offline Training Labs**:
  1. **The Master's Path**: 6 Worlds × 73 Chapters = 365 Levels (21,900 offline tactical puzzles).
  2. **Opening Codex**: 5 Classical Pillars × 24 Volumes × 96 Chapters × 4 Stages = 384 Stages (3,865 ECO lines).
  3. **Endgame Crown**: 5 Endgame Sanctums × 25 Canonical Halls × 4 Acts = 100 Levels / 300 Bouts.
  4. **Play Otto**: Zero-config 60:00 classical chess with adaptive strength and 1-tap post-game review.

## Canonical Multilingual Entry Points (9 Languages)
- English (Default): https://chessminds.app/
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- Russian (Русский): https://chessminds.app/ru
- Japanese (日本語): https://chessminds.app/ja
- Arabic (العربية · RTL): https://chessminds.app/ar

## Interactive Chess Encyclopedia Hubs
- [Opening Codex Encyclopedia (24 Volumes · 96 Chapters · 3,865 ECO Lines)](https://chessminds.app/openings)
- [Endgame Crown Atlas (25 Canonical Theoretical Endgame Halls)](https://chessminds.app/endgames)
- [Grandmaster Style & Masterpiece Atlas (20 World Champions & Chess Legends)](https://chessminds.app/players)
- [Privacy Policy](https://chessminds.app/privacy-policy)

## 24 Flagship Opening Codex Volumes (with 96 Interactive Chapter Guides)
- **Vol.01 [Italian Game](https://chessminds.app/openings/italian-game)** (C50–C59 · `1. e4 e5 2. Nf3 Nc6 3. Bc4` · 187 ECO lines · Eval +0.27): [Ch.1 Giuoco Piano & Pianissimo](https://chessminds.app/openings/italian-game), [Ch.2 Classical & Greco Variations](https://chessminds.app/openings/italian-classical-greco), [Ch.3 Two Knights Defense](https://chessminds.app/openings/fried-liver-attack), [Ch.4 Evans & Italian Gambits](https://chessminds.app/openings/evans-gambit)
- **Vol.02 [Ruy Lopez](https://chessminds.app/openings/ruy-lopez)** (C60–C99 · `1. e4 e5 2. Nf3 Nc6 3. Bb5` · 235 ECO lines · Eval +0.21): [Ch.1 Morphy Defense Mainlines](https://chessminds.app/openings/ruy-lopez), [Ch.2 Berlin & Classical Defenses](https://chessminds.app/openings/berlin-defense), [Ch.3 Open & Exchange Variations](https://chessminds.app/openings/ruy-lopez-exchange), [Ch.4 Closed & Marshall Attack](https://chessminds.app/openings/marshall-attack)
- **Vol.03 [Scotch & Four Knights Game](https://chessminds.app/openings/scotch-game)** (C44–C49 · `1. e4 e5 2. Nf3 Nc6 3. d4 / 3. Nc3` · 109 ECO lines · Eval +0.24): [Ch.1 Scotch Classical & Mieses](https://chessminds.app/openings/scotch-game), [Ch.2 Scotch & Göring Gambits](https://chessminds.app/openings/scotch-gambit), [Ch.3 Four Knights Spanish & Italian](https://chessminds.app/openings/four-knights-game), [Ch.4 Four Knights Scotch & Belgrade](https://chessminds.app/openings/four-knights-scotch)
- **Vol.04 [Petrov & Philidor Defense](https://chessminds.app/openings/petrov-defense)** (C40–C43 · `1. e4 e5 2. Nf3 Nf6 / 2...d6` · 132 ECO lines · Eval +0.16): [Ch.1 Petrov Classical & Nimzowitsch](https://chessminds.app/openings/petrov-defense), [Ch.2 Petrov Modern, Stafford & Latvian](https://chessminds.app/openings/petrov-modern-attack), [Ch.3 Philidor Hanham & Lion](https://chessminds.app/openings/philidor-defense), [Ch.4 Philidor Exchange & Countergambits](https://chessminds.app/openings/philidor-exchange)
- **Vol.05 [King's Gambit & Vienna Game](https://chessminds.app/openings/vienna-gambit)** (C25–C39 · `1. e4 e5 2. f4 / 2. Nc3` · 247 ECO lines · Eval -0.21): [Ch.1 King's Gambit Accepted: Knight](https://chessminds.app/openings/kings-gambit), [Ch.2 Bishop's Gambit & Muzio](https://chessminds.app/openings/bishops-gambit-muzio), [Ch.3 Falkbeer & Gambit Declined](https://chessminds.app/openings/falkbeer-countergambit), [Ch.4 Vienna Game & Vienna Gambit](https://chessminds.app/openings/vienna-gambit)
- **Vol.06 [Center, Danish & Bishop's Opening](https://chessminds.app/openings/danish-gambit)** (C20–C24 · `1. e4 e5 2. d4 / 2. Bc4 / 3. c3` · 123 ECO lines · Eval +0.14): [Ch.1 Center Game Mainlines](https://chessminds.app/openings/center-game), [Ch.2 Danish Gambit Accepted & Declined](https://chessminds.app/openings/danish-gambit), [Ch.3 Bishop's Opening & Urusov Gambit](https://chessminds.app/openings/bishops-opening), [Ch.4 Ponziani & King's Pawn Sidelines](https://chessminds.app/openings/ponziani-opening)
- **Vol.07 [Sicilian: Open Mainlines](https://chessminds.app/openings/sicilian-najdorf)** (B32–B99 · `1. e4 c5 2. Nf3 ... 3. d4 cxd4` · 224 ECO lines · Eval +0.25): [Ch.1 Najdorf Variation (5...a6)](https://chessminds.app/openings/sicilian-najdorf), [Ch.2 Dragon & Accelerated Dragon](https://chessminds.app/openings/sicilian-dragon), [Ch.3 Classical, Rauzer & Sveshnikov](https://chessminds.app/openings/sveshnikov-sicilian), [Ch.4 Scheveningen, Kan & Taimanov](https://chessminds.app/openings/taimanov-scheveningen-sicilian)
- **Vol.08 [Sicilian: Anti-Sicilian Systems](https://chessminds.app/openings/alapin-sicilian)** (B20–B55 · `1. e4 c5 2. c3 / 2. Nc3 / 3. Bb5+` · 170 ECO lines · Eval +0.15): [Ch.1 Alapin Variation (2. c3)](https://chessminds.app/openings/alapin-sicilian), [Ch.2 Closed Sicilian & Grand Prix](https://chessminds.app/openings/grand-prix-attack), [Ch.3 Smith-Morra & Wing Gambits](https://chessminds.app/openings/smith-morra-gambit), [Ch.4 Rossolimo, Moscow & O'Kelly](https://chessminds.app/openings/rossolimo-sicilian)
- **Vol.09 [French Defense](https://chessminds.app/openings/french-defense)** (C00–C19 · `1. e4 e6 2. d4 d5` · 212 ECO lines · Eval +0.32): [Ch.1 Advance, Exchange & King's Indian](https://chessminds.app/openings/french-defense), [Ch.2 Tarrasch (3. Nd2) & Rubinstein](https://chessminds.app/openings/french-tarrasch), [Ch.3 Winawer Variation (3. Nc3 Bb4)](https://chessminds.app/openings/french-winawer), [Ch.4 Classical & Steinitz (3...Nf6)](https://chessminds.app/openings/french-classical)
- **Vol.10 [Caro-Kann Defense](https://chessminds.app/openings/caro-kann-defense)** (B10–B19 · `1. e4 c6 2. d4 d5` · 110 ECO lines · Eval +0.15): [Ch.1 Classical, Karpov & Tartakower](https://chessminds.app/openings/caro-kann-classical), [Ch.2 Advance Variation (3. e5)](https://chessminds.app/openings/caro-kann-defense), [Ch.3 Exchange & Panov Attack](https://chessminds.app/openings/panov-botvinnik-attack), [Ch.4 Two Knights & Fantasy Sidelines](https://chessminds.app/openings/caro-kann-two-knights)
- **Vol.11 [Scandinavian, Alekhine & Pirc](https://chessminds.app/openings/scandinavian-defense)** (B00–B09 · `1. e4 d5 / 1...Nf6 / 1...d6` · 250 ECO lines · Eval +0.18): [Ch.1 Scandinavian Defense (1...d5)](https://chessminds.app/openings/scandinavian-defense), [Ch.2 Alekhine Defense (1...Nf6)](https://chessminds.app/openings/alekhine-defense), [Ch.3 Pirc & Modern Defense (1...d6/g6)](https://chessminds.app/openings/pirc-defense), [Ch.4 Nimzowitsch (1...Nc6) & Owen (1...b6)](https://chessminds.app/openings/nimzowitsch-owen-defense)
- **Vol.12 [Queen's Gambit Declined](https://chessminds.app/openings/queens-gambit)** (D30–D69 · `1. d4 d5 2. c4 e6` · 180 ECO lines · Eval +0.27): [Ch.1 Orthodox, Tartakower & Lasker](https://chessminds.app/openings/queens-gambit), [Ch.2 QGD Exchange & Harrwitz](https://chessminds.app/openings/qgd-exchange-variation), [Ch.3 Ragozin, Vienna & Cambridge](https://chessminds.app/openings/ragozin-defense), [Ch.4 Albin Countergambit & Chigorin](https://chessminds.app/openings/albin-countergambit)
- **Vol.13 [Queen's Gambit Accepted & Tarrasch](https://chessminds.app/openings/queens-gambit-accepted)** (D20–D34 · `1. d4 d5 2. c4 dxc4 / 3...c5` · 117 ECO lines · Eval +0.22): [Ch.1 QGA Classical & Normal (3. Nf3)](https://chessminds.app/openings/queens-gambit-accepted), [Ch.2 QGA Central & Accelerated (3. e4)](https://chessminds.app/openings/qga-central-variation), [Ch.3 Tarrasch Defense (3...c5)](https://chessminds.app/openings/tarrasch-defense), [Ch.4 Semi-Tarrasch Defense (4...c5)](https://chessminds.app/openings/semi-tarrasch-defense)
- **Vol.14 [Slav & Semi-Slav Defense](https://chessminds.app/openings/slav-defense)** (D10–D19 · `1. d4 d5 2. c4 c6` · 130 ECO lines · Eval +0.21): [Ch.1 Slav Mainline (Czech) & Quiet](https://chessminds.app/openings/slav-defense), [Ch.2 Slav Exchange, Geller & Gambits](https://chessminds.app/openings/slav-exchange-geller), [Ch.3 Semi-Slav Meran & Accelerated](https://chessminds.app/openings/semi-slav-meran), [Ch.4 Botvinnik, Moscow & Anti-Meran](https://chessminds.app/openings/botvinnik-semi-slav)
- **Vol.15 [London, Torre & Colle Systems](https://chessminds.app/openings/london-system)** (D00–D05 · `1. d4 ... 2. Bf4 / 3. Bf4 / 3. Bg5` · 93 ECO lines · Eval +0.04): [Ch.1 London System Classical](https://chessminds.app/openings/london-system), [Ch.2 Jobava London & Veresov Attack](https://chessminds.app/openings/jobava-london), [Ch.3 Torre Attack (Bg5)](https://chessminds.app/openings/torre-attack), [Ch.4 Colle, Zukertort & Rubinstein](https://chessminds.app/openings/colle-system)
- **Vol.16 [Trompowsky & Queen's Pawn Gambits](https://chessminds.app/openings/trompowsky-attack)** (A40–A45 · `1. d4 Nf6 2. Bg5 / 1. d4 d5 2. e4` · 117 ECO lines · Eval +0.10): [Ch.1 Trompowsky & Levitsky Attacks](https://chessminds.app/openings/trompowsky-attack), [Ch.2 Blackmar-Diemer Gambit Accepted](https://chessminds.app/openings/blackmar-diemer-gambit), [Ch.3 Blackmar-Diemer Declined & Vienna](https://chessminds.app/openings/blackmar-diemer-declined), [Ch.4 Mason, Chigorin & Anti-Englund](https://chessminds.app/openings/englund-gambit)
- **Vol.17 [King's Indian Defense](https://chessminds.app/openings/kings-indian-defense)** (E60–E99 · `1. d4 Nf6 2. c4 g6 3. Nc3 Bg7` · 119 ECO lines · Eval +0.40): [Ch.1 Orthodox, Petrosian & Bayonet](https://chessminds.app/openings/kings-indian-defense), [Ch.2 Fianchetto Variation (g3 + Bg2)](https://chessminds.app/openings/kings-indian-fianchetto), [Ch.3 Sämisch Variation (5. f3)](https://chessminds.app/openings/kings-indian-samisch), [Ch.4 Averbakh & Four Pawns Attack](https://chessminds.app/openings/four-pawns-attack)
- **Vol.18 [Grünfeld & Benoni Defense](https://chessminds.app/openings/grunfeld-defense)** (D70–D99 · `1. d4 Nf6 2. c4 g6 3. Nc3 d5 / 2...c5` · 206 ECO lines · Eval +0.18): [Ch.1 Grünfeld Exchange Variation](https://chessminds.app/openings/grunfeld-defense), [Ch.2 Grünfeld Russian & Neo-Grünfeld](https://chessminds.app/openings/neo-grunfeld-russian), [Ch.3 Modern Benoni & Pterodactyl](https://chessminds.app/openings/modern-benoni), [Ch.4 Benko Gambit & Blumenfeld](https://chessminds.app/openings/benko-gambit)
- **Vol.19 [Nimzo-Indian & Queen's Indian](https://chessminds.app/openings/nimzo-indian-defense)** (E11–E59 · `1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 / 3. Nf3 b6` · 208 ECO lines · Eval +0.16): [Ch.1 Nimzo-Indian Rubinstein (4. e3)](https://chessminds.app/openings/nimzo-indian-defense), [Ch.2 Nimzo Classical (4. Qc2) & Sämisch](https://chessminds.app/openings/nimzo-indian-classical), [Ch.3 Queen's Indian Mainlines](https://chessminds.app/openings/queens-indian-defense), [Ch.4 Bogo-Indian & Delayed Queen's Indian](https://chessminds.app/openings/bogo-indian-defense)
- **Vol.20 [Dutch, Budapest & Old Indian](https://chessminds.app/openings/dutch-leningrad)** (A80–A99 · `1. d4 f5 / 1. d4 Nf6 2. c4 e5` · 97 ECO lines · Eval +0.18): [Ch.1 Dutch Leningrad Variation (g6 + Bg7)](https://chessminds.app/openings/dutch-leningrad), [Ch.2 Dutch Stonewall & Classical](https://chessminds.app/openings/dutch-stonewall), [Ch.3 Dutch Staunton Gambit & Anti-Dutch](https://chessminds.app/openings/staunton-gambit), [Ch.4 Budapest Gambit & Old Indian Defense](https://chessminds.app/openings/budapest-gambit)
- **Vol.21 [Catalan Opening](https://chessminds.app/openings/catalan-opening)** (E00–E09 · `1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2` · 66 ECO lines · Eval +0.26): [Ch.1 Open Catalan (4...dxc4)](https://chessminds.app/openings/catalan-opening), [Ch.2 Closed Catalan Mainlines](https://chessminds.app/openings/closed-catalan), [Ch.3 Catalan Classical & Bogo-Catalan](https://chessminds.app/openings/bogo-catalan), [Ch.4 Agincourt & Neo-Catalan Transpositions](https://chessminds.app/openings/neo-catalan)
- **Vol.22 [English Opening](https://chessminds.app/openings/english-opening)** (A10–A39 · `1. c4 e5 / 1...c5 / 1...Nf6` · 161 ECO lines · Eval +0.26): [Ch.1 King's English (1...e5)](https://chessminds.app/openings/kings-english), [Ch.2 Symmetrical Variation (1...c5)](https://chessminds.app/openings/english-opening), [Ch.3 Anglo-Indian & Anglo-Grünfeld](https://chessminds.app/openings/anglo-indian-defense), [Ch.4 Agincourt, Caro-Kann & Mikenas](https://chessminds.app/openings/english-mikenas-attack)
- **Vol.23 [Réti & King's Indian Attack](https://chessminds.app/openings/reti-opening)** (A04–A09 · `1. Nf3 d5 2. c4 / 2. g3` · 117 ECO lines · Eval +0.20): [Ch.1 Réti Opening Mainlines](https://chessminds.app/openings/reti-opening), [Ch.2 Réti Anglo-Slav & Fianchetto](https://chessminds.app/openings/reti-anglo-slav), [Ch.3 King's Indian Attack](https://chessminds.app/openings/kings-indian-attack), [Ch.4 Zukertort & Hypermodern Setups](https://chessminds.app/openings/zukertort-opening)
- **Vol.24 [Bird, Nimzo-Larsen & Flank Openings](https://chessminds.app/openings/bird-opening)** (A00–A03 · `1. f4 / 1. b3 / 1. b4 / 1. Nc3` · 138 ECO lines · Eval +0.08): [Ch.1 Bird's Opening & From's Gambit (1. f4)](https://chessminds.app/openings/bird-opening), [Ch.2 Nimzo-Larsen Attack (1. b3)](https://chessminds.app/openings/nimzo-larsen-attack), [Ch.3 Polish / Sokolsky Opening (1. b4)](https://chessminds.app/openings/polish-opening), [Ch.4 Dunst (1. Nc3) & Hungarian (1. g3)](https://chessminds.app/openings/dunst-opening)

## All 25 Canonical Chess Endgame Halls
- **T01 [Ladder Mate (Lawnmower Checkmate)](https://chessminds.app/endgames/ladder-mate)** (`Q+R / 2R vs K` · Theoretical Win · Key Move `Qf3!`): Assign each heavy piece its own rank or file—one holds the invisible fence while its partner steps past to shrink the enemy King's corridor.
- **T02 [King & Queen vs King Checkmate](https://chessminds.app/endgames/queen-checkmate)** (`K+Q vs K` · Theoretical Win · Key Move `Kd4!`): Clamp the lone King with knight-distance Queen geometry, then freeze your Queen once the enemy King hits the rim and march your own King in for the kiss-of-death mate.
- **T03 [King & Rook vs King Box Checkmate](https://chessminds.app/endgames/rook-checkmate)** (`K+R vs K` · Theoretical Win · Key Move `Rd1!`): Shrink the lone King's rectangular box whenever your Rook can tighten a file or rank safely, and walk your King in whenever the box pauses.
- **T04 [Two Bishops Checkmate (K+2B vs K)](https://chessminds.app/endgames/two-bishops-checkmate)** (`K+2B vs K` · Theoretical Win · Key Move `Bg2+!`): Stand your two Bishops side by side on adjacent files or ranks to weave an impenetrable double-color diagonal wall, then march your King in to drive the lone monarch into ANY corner.
- **T05 [Bishop & Knight Checkmate (W-Maneuver)](https://chessminds.app/endgames/bishop-and-knight-checkmate)** (`K+B+N vs K` · Theoretical Win · Key Move `Nb3+!`): Checkmate ONLY exists in the two corners matching your Bishop's color—use the Knight's W-path along the third file/rank to herd the enemy King out of the wrong corner.
- **T06 [Rule of the Square in Pawn Endgames](https://chessminds.app/endgames/rule-of-the-square)** (`K+P vs K` · Theoretical Win · Key Move `a4!`): Project a diagonal from the passed pawn to the promotion rank—if the defending King cannot step inside that square on its turn, the pawn queens by force.
- **T07 [Direct & Distant Opposition in Pawn Endgames](https://chessminds.app/endgames/king-and-pawn-opposition)** (`K+P vs K` · Theoretical Win · Key Move `Kf5!`): Lead with your King in front of the pawn and seize opposition so the defending monarch must step aside from the queening square.
- **T08 [Key Squares & King Outflanking](https://chessminds.app/endgames/key-squares-and-outflanking)** (`K+P vs K` · Theoretical Win · Key Move `Ke5!`): Keep your pawn back while your King outflanks the defender to occupy any one of the three key squares two ranks ahead of the pawn.
- **T09 [Rook-Pawn & Stalemate Corner Draws](https://chessminds.app/endgames/rook-pawn-draws)** (`K vs K+a/h-P` · Theoretical Draw · Key Move `Kf6!`): Against an enemy rook pawn, race straight for the corner OR lock the attacking King onto the edge file by oscillating on the adjacent bishop-file's 7th and 8th ranks.
- **T10 [Outside Passed Pawn & Wing Freeze](https://chessminds.app/endgames/outside-passed-pawn)** (`K+Ps vs K+Ps` · Theoretical Win · Key Move `g5!`): Freeze the opponent's wing majority first so they cannot manufacture a fast counter-passer, then use your outside passed pawn as a decoy to abandon and raid the opposite flank.
- **T11 [Triangulation, Spare Tempos & Zugzwang](https://chessminds.app/endgames/triangulation-and-zugzwang)** (`K+Ps vs K+Ps` · Theoretical Win · Key Move `Kf5!`): Never burn reserve pawn tempos prematurely—use a three-step King triangle or a withheld rear pawn to hand the move back in identical geometry and trigger zugzwang.
- **T12 [Philidor Position: 3rd-Rank Rook Cutoff](https://chessminds.app/endgames/philidor-position)** (`K+R vs K+R+P` · Theoretical Draw · Key Move `Rc6!`): Patrol your 3rd rank (6th rank for Black) to bar the enemy King from advancing; the instant the pawn steps onto that rank, drop your Rook to the far end for relentless rear checks.
- **T13 [Lucena Position: Building the 4th-Rank Bridge](https://chessminds.app/endgames/lucena-position)** (`K+R+P vs K+R` · Theoretical Win · Key Move `Re1+!`): Check the defending King one file farther away first, lift your Rook to the 4th rank, and zigzag your King out until your Rook interposes to build the bridge.
- **T14 [Long-Side Rook Checks & Short-Side King](https://chessminds.app/endgames/long-side-rook-defense)** (`K+R vs K+R+P` · Theoretical Draw · Key Move `Ra1!`): Tuck your King on the short side of the passed pawn and park your Rook on the farthest long-side file—three empty files between Rook and pawn prevent the enemy King from approaching.
- **T15 [Vančura Position: Lateral 6th-Rank Defense](https://chessminds.app/endgames/vancura-position)** (`K+R vs K+R+a-P` · Theoretical Draw · Key Move `Rf5+!`): Before an enemy rook pawn reaches the 7th rank, station your Rook actively on the f-file behind the 6th rank—attacking a6 horizontally whenever the King hides and checking laterally whenever it emerges.
- **T16 [Tarrasch Rule & Active Rook Coordination](https://chessminds.app/endgames/tarrasch-rule)** (`K+R+Ps vs K+R+Ps` · Theoretical Win · Key Move `Kg5!`): Station Rooks behind passed pawns whenever possible—and when converting extra connected pawns, lead with your King and use active Rook interpositions to neutralize flank checks.
- **T17 [7th-Rank Pigs: Doubled Rooks & Blind Swine Mate](https://chessminds.app/endgames/doubled-rooks-seventh-rank)** (`2R vs R+Ps` · Theoretical Win · Key Move `Rxg7+!`): Once two Rooks link up on the 7th rank, sweep the g7 and h7 shield pawns in succession to lock the enemy King into an inescapable two-square mating treadmill.
- **T18 [Same-Colored Bishops: Good vs Bad Bishop](https://chessminds.app/endgames/good-bishop-vs-bad-bishop)** (`K+B+P vs K+B+P` · Theoretical Win · Key Move `Be5+!`): Fix your opponent's pawns onto the same square color as their Bishop while keeping your own pawns mobile, turning the ending into an extra-piece power play.
- **T19 [Opposite-Colored Bishops Fortress](https://chessminds.app/endgames/opposite-colored-bishops)** (`K+B vs K+B+2P` · Theoretical Draw · Key Move `Bc8!`): Blockade enemy pawns strictly on squares matching YOUR Bishop's color—since the rival Bishop travels on the opposite complex, it can never challenge your fortress.
- **T20 [Bishop vs Knight: Two-Wing Domination](https://chessminds.app/endgames/bishop-vs-knight-endgames)** (`K+B+P vs K+N+2P` · Theoretical Win · Key Move `Kg3!`): When play spans both wings, centralize the Bishop to police both flanks at once while using your King to strip the short-legged Knight of safe jumps.
- **T21 [Knight vs Rook Pawn: The Saving Barrier Circuit](https://chessminds.app/endgames/knight-vs-rook-pawn)** (`K+N vs K+h-P` · Theoretical Draw · Key Move `Ng4!`): Against an enemy rook pawn on h3 (or a3), steer your Knight immediately into the four-square loop g4–h2–f1–e3 so every King approach walks straight into check.
- **T22 [Queen vs 7th-Rank Pawn: Staircase Technique](https://chessminds.app/endgames/queen-vs-seventh-rank-pawn)** (`K+Q vs K+P (7th)` · Theoretical Win · Key Move `Qf4+!`): Zigzag your Queen closer with alternating checks and pins to force the defending King IN FRONT of its 7th-rank pawn, winning one free tempo to bring your own King in.
- **T23 [Queen Endgames: Checks & X-Ray Skewers](https://chessminds.app/endgames/queen-and-pawn-endgames)** (`K+Q vs K+Q+P` · Theoretical Draw · Key Move `Qa1+!`): Centralize or maximize checking distance with your Queen—and hunt constantly for rank, file, and diagonal X-ray skewers through the enemy King onto the rival Queen.
- **T24 [Queen vs Rook: Breaking the R+P Fortress](https://chessminds.app/endgames/queen-vs-rook-fortress)** (`K+Q vs K+R+P` · Theoretical Win · Key Move `Qg2+!`): Never let the defender's Rook settle onto its pawn-protected 3rd-rank perch—invade behind their camp with tempo checks first to sever King-and-Rook harmony.
- **T25 [Underpromotion (=R / =N) & Stalemate Traps](https://chessminds.app/endgames/underpromotion-and-fortresses)** (`Underpromotion Study` · Theoretical Win · Key Move `f8=R!`): Pause for two seconds before every edge or f/c-pawn promotion—when a new Queen sweeps the lone King's last diagonal breath, underpromoting to a Rook wins cleanly.

## All 20 Grandmaster Style & Masterpiece Profiles
- **[Magnus Carlsen](https://chessminds.app/players/magnus-carlsen)** (NOR · Peak 2882 FIDE · 16th World Champion (2013–2023)): *2016 World Championship Tiebreak Queen Sacrifice* (2016, `50. Qh6+!!`)
- **[Garry Kasparov](https://chessminds.app/players/garry-kasparov)** (RUS · Peak 2851 FIDE · 13th World Champion (1985–2000)): *Kasparov's Immortal · King Hunt Across the Whole Board* (1999, `24. Rxd4!!`)
- **[Bobby Fischer](https://chessminds.app/players/bobby-fischer)** (USA · Peak 2785 FIDE · 11th World Champion (1972–1975)): *The Game of the Century · 13-Year-Old Fischer's Queen Offer* (1956, `17... Be6!!`)
- **[Mikhail Tal](https://chessminds.app/players/mikhail-tal)** (LAT · Peak 2705 FIDE · 8th World Champion (1960–1961)): *Candidates Decider · Tal's Classic 16. Nd5!! Sicilian Sacrifice* (1965, `16. Nd5!!`)
- **[José Raúl Capablanca](https://chessminds.app/players/jose-raul-capablanca)** (CUB · Peak 8 yrs Unbeaten · 3rd World Champion (1921–1927)): *New York 1924 Rook Endgame · The Immortal King March* (1924, `35. Kg3!!`)
- **[Paul Morphy](https://chessminds.app/players/paul-morphy)** (USA · Peak 19th-C #1 · Uncrowned World #1 (1858–1859)): *The Opera Game · Textbook Development & 16. Qb8+!! Mate* (1858, `10. Nxb5!!`)
- **[Anatoly Karpov](https://chessminds.app/players/anatoly-karpov)** (RUS · Peak 2780 FIDE · 12th World Champion (1975–1985)): *Nice Olympiad 1974 · The Famous 24. Ba7!! Boa Constrictor Seal* (1974, `24. Ba7!!`)
- **[Viswanathan Anand](https://chessminds.app/players/viswanathan-anand)** (IND · Peak 2817 FIDE · 15th World Champion (2000–2002, 2007–2013)): *Anand's Immortal · 16...Nde5!! Semi-Slav Counterattack* (2013, `16... Nde5!!`)
- **[Vladimir Kramnik](https://chessminds.app/players/vladimir-kramnik)** (RUS · Peak 2817 FIDE · 14th World Champion (2000–2007)): *London 2000 WCh Game 2 · Dethroning Kasparov without a Loss* (2000, `24. e5!`)
- **[Mikhail Botvinnik](https://chessminds.app/players/mikhail-botvinnik)** (RUS · Peak 3× World Champ · 6th World Champion (1948–1963, 3 Reigns)): *AVRO 1938 Masterpiece · 30. Ba3!! Deflection vs Capablanca* (1938, `30. Ba3!!`)
- **[Alexander Alekhine](https://chessminds.app/players/alexander-alekhine)** (FRA · Peak 17 yrs Champ · 4th World Champion (1927–1935, 1937–1946)): *Baden-Baden 1925 · The 12-Move 26...Re3!! Combination vs Réti* (1925, `26... Re3!!`)
- **[Tigran Petrosian](https://chessminds.app/players/tigran-petrosian)** (ARM · Peak Iron Tigran · 9th World Champion (1963–1969)): *1966 World Championship G10 · Double Exchange Sac & 30. Qh8+!!* (1966, `30. Qh8+!!`)
- **[Judit Polgár](https://chessminds.app/players/judit-polgar)** (HUN · Peak 2735 · World #8 · World #8 Overall · Beat 11 World Champions): *Dos Hermanas 1999 · Crushing Anand in the Sicilian Najdorf* (1999, `23. Be6!!`)
- **[Hikaru Nakamura](https://chessminds.app/players/hikaru-nakamura)** (USA · Peak 2816 FIDE · #2 · World #2 Classical (2816) · Speed Chess Legend): *Barcelona 2007 · 21...Qxf2+!! Queen Sacrifice King Walk to h4* (2007, `21... Qxf2+!!`)
- **[Fabiano Caruana](https://chessminds.app/players/fabiano-caruana)** (USA · Peak 2844 FIDE · #3 All-Time · 2844 FIDE (#3 All-Time) · 12-Draw Classical WCh Tie): *2021 Candidates R8 · The 18. Bc4!! Poisoned-Pawn Lab Bomb* (2021, `18. Bc4!!`)
- **[Gukesh Dommaraju](https://chessminds.app/players/gukesh-dommaraju)** (IND · Peak 2794 · Champ at 18 · 18th World Champion (2024–Present, Age 18)): *2024 Singapore WCh Game 11 · High-Wire Queenside Squeeze* (2024, `28. Rdb1!`)
- **[Ding Liren](https://chessminds.app/players/ding-liren)** (CHN · Peak 2816 · 100-Game Unbeaten · 17th World Champion (2023–2024)): *2023 Astana WCh Tiebreak G4 · The Immortal 46...Rg6!! Self-Pin* (2023, `46... Rg6!!`)
- **[Wei Yi](https://chessminds.app/players/wei-yi)** (CHN · Peak 2763 · Youngest 2700 · Youngest Ever to 2700 (Age 15) · Tata Steel Champion): *Wei Yi's 21st-Century Immortal · 22. Rxf7!! King Walk to h3* (2015, `22. Rxf7!!`)
- **[Ju Wenjun](https://chessminds.app/players/ju-wenjun)** (CHN · Peak 5× Women's World Champ · 5× Women's World Champion (2018–Present)): *2024 Tata Steel Masters · Endgame Masterclass vs Firouzja* (2024, `53. Nxe4!`)
- **[Hou Yifan](https://chessminds.app/players/hou-yifan)** (CHN · Peak 2686 · Champ at 16 · 4× Women's World Champion · GM at 14, Champ at 16): *Gibraltar 2012 Historic Clash · Defeating Judit Polgár* (2012, `24. Nxe6!!`)