CHAPTER 38: Correspondence Chess - The Ultimate Training Ground

Rating Range: 1600-2200

"In correspondence chess, there are no excuses. You have days to think, engines to consult, and databases at your fingertips. Every mistake is a choice. Every brilliant move is earned." - IM Arno Nickel, correspondence chess champion

What You'll Learn

By the end of this chapter, you will:

  • Understand what correspondence chess is and why it's the ultimate training format
  • Learn how to use engines LEGALLY and effectively in correspondence play
  • Master the deep analysis methodology that correspondence chess demands
  • Discover how correspondence training transforms your over-the-board play
  • Get started with your first correspondence games on ICCF or Lichess
  • Experience chess at a depth most players never reach

There's a form of chess where you have DAYS to think about a single move. Where engines are your allies, not your crutches. Where the quality of play reaches heights that over-the-board games rarely touch. Welcome to correspondence chess.

What Is Correspondence Chess?

Correspondence chess is chess played with extended time controls - typically 3 to 10 days per move. It began in the 18th century with postal chess, where players literally mailed their moves on postcards. Today, it's played on servers like ICCF (International Correspondence Chess Federation) and Lichess.

Here's what shocks most players: In official ICCF correspondence chess, using engines is completely legal.

This isn't cheating. This is the format.

But before you think "Oh, so the engine just plays for you," understand this: correspondence chess with engines is HARDER than over-the-board chess, not easier. Here's why:

What Engines CAN'T Do:

  • Understand long-term positional plans
  • Consider your opponent's psychological tendencies
  • Navigate complex endgames at shallow depth
  • Make strategic decisions in closed positions
  • Know when to deviate from the "best" move for practical reasons

What YOU Must Do:

  • Choose which positions to analyze deeply
  • Decide when engines disagree
  • Understand WHY a move is strong
  • Create plans that engines can't see
  • Outthink your opponent's human+engine team

Correspondence chess is human+engine vs. human+engine. The human part is what wins.

Why Correspondence Chess Matters

Think about how you learn chess normally:

Over-the-Board:

  • Play a game in 1-3 hours
  • Make 40 moves
  • Analyze afterward with an engine
  • Realize you missed 20 tactics
  • Feel frustrated

Correspondence:

  • Spend days on a single position
  • Calculate 15-20 moves deep BEFORE committing
  • Compare multiple engine suggestions
  • Make moves you UNDERSTAND, not moves you hope work
  • Build calculation habits that transform your OTB play

Correspondence chess is like practicing basketball by doing 1000 free throws vs. playing pickup games. Both matter. But the free throws build technique that lasts.

Brief History

  • 1730s: First recorded postal chess games in Europe
  • 1845: The London Chess Club plays matches against Edinburgh by post
  • 1928: The first correspondence chess world championship begins
  • 1951: ICCF (International Correspondence Chess Federation) founded
  • 1990s: Email and server-based correspondence replaces postal mail
  • 2000s: Engine use becomes officially allowed in ICCF
  • Today: Top correspondence players achieve performance ratings above 2800

The format has evolved, but the core remains: chess played with enough time to find the TRUTH of the position.

The Correspondence Chess Workflow

Here's how correspondence chess actually works, step by step:

Step 1: Your Opponent Moves

You receive a notification: "It's your move." You open the game and see the position.

Step 2: First Impression (5 minutes)

Before touching an engine, ask:

  • What is my opponent trying to do?
  • What are the critical features of this position?
  • What are my candidate moves?

Write these down. Your human intuition matters.

Step 3: Candidate Move Generation (10 minutes)

List 3-5 candidate moves. For each, write one sentence describing its PURPOSE.

Example:

  • 15...Nd7 - Reroutes knight to c5, puts pressure on e4
  • 15...Bg4 - Pins knight, creates tactical threats on f3
  • 15...Re8 - Prepares ...e5, central break

Step 4: Engine Consultation (30 minutes)

Now run your engine at HIGH depth (30+ for Stockfish, 1+ million nodes for Leela).

Critical: Don't just look at the top move. Look at the top 3-5 moves and their evaluations. When the engine shows +0.5 for move A and +0.4 for move B, those positions are EQUAL in the engine's eyes. Your human judgment breaks the tie.

Step 5: Compare Engines (20 minutes)

Run a SECOND engine (e.g., if you used Stockfish, now use Leela).

When engines agree: You've probably found the objective best move.

When engines DISAGREE: This is where you LEARN. Stockfish might prefer concrete tactics while Leela prefers piece activity. Study both plans. Understand why each engine evaluates differently. THIS is correspondence chess mastery.

Step 6: Deep Analysis of Your Chosen Line (1-3 hours)

Calculate the main line 10-15 moves deep. Write variations. Add notes explaining critical moments.

Example Analysis Note:

After 16.Nd5 Nxd5 17.exd5, Black must play 17...Bd7! The key point is that after 18.Bf4, Black has 18...e5! 19.dxe6 fxe6 and the e6 pawn gives Black central control. If instead 17...Bf5?, then 18.Bg5! and White's pressure is too strong.

This is the depth correspondence chess demands.

Step 7: Make Your Move

When you're confident you understand the position's truth, play your move.

Time Investment: 1-2 hours for critical middlegame positions, 30 minutes for routine moves, 3+ hours for critical tactical moments.

Deep Analysis Methodology

Correspondence chess taught the chess world how to analyze properly. Here's the system:

Principle 1: Breadth First, Depth Second

WRONG Approach:

  • Pick the first move that looks good
  • Analyze it 20 moves deep
  • Play it

RIGHT Approach:

  • Generate 5 candidate moves
  • Analyze each 5 moves deep
  • Eliminate clearly inferior moves
  • THEN go deep on the remaining 2-3 moves

Why? Because analyzing the wrong move to depth 20 teaches you nothing. You need to find the RIGHT MOVE first.

Principle 2: Branch Pruning

You can't analyze everything. A position might have 40 legal moves. You must PRUNE the tree.

Prune Based On:

  • Violates basic principles (hangs material, weakens king)
  • Passive when activity is needed
  • Unclear purpose or plan
  • Engine evaluation significantly worse than alternatives

Keep Based On:

  • Engine suggests it (top 5 moves)
  • Fits a clear plan
  • Creates concrete threats
  • Improves your worst piece

Aim for 3-5 candidate moves, not 15.

Principle 3: Position Notes

Write WORDS, not just moves.

Weak Analysis:

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Na5 10.Bc2 c5

Strong Analysis:

Marshall Attack: After 8.c3 0-0, Black plays 9...Na5 to reroute to c4. White's 9.h3 prevents ...Ng4 but costs time. After 10...c5, Black aims for ...Nc4 and ...Qc7, building pressure against e4. White must decide: d4 immediately or prepare with Nbd2 first.

KEY POSITION after 10...c5:
- If 11.d4 exd4 12.cxd4, Black gets ...Qc7 with central tension
- If 11.Nbd2, Black plays 11...Nc4 with good piece play
- Critical question: Can White maintain the e4 pawn?

See the difference? The second version builds UNDERSTANDING.

Principle 4: When to Stop Analyzing

Analysis paralysis is real. You can spend 10 hours on a single position and still not be certain.

Stop When:

  • All major lines converge to similar evaluations
  • You understand the resulting positions (even if unclear)
  • You've invested 2-3 hours and must make a practical choice
  • The position is objectively drawn or lost (no amount of analysis changes that)

Continue When:

  • Engines strongly disagree
  • You see a promising line you haven't analyzed yet
  • The move is irreversible (sacrifice, pawn break, permanent structure change)
  • You're in a critical tournament game

Trust your work. Eventually, you must play chess, not just analyze it.

How Correspondence Chess Improves OTB Play

Every strong correspondence player will tell you: correspondence training transforms your over-the-board results.

Improvement #1: Deep Calculation Becomes Natural

In OTB chess, you calculate 5-8 moves in critical positions. In correspondence, you routinely calculate 15-20 moves. After a year of correspondence play, returning to OTB chess feels like slow motion.

What Happens:

  • You see tactics earlier
  • You trust your calculation (it's been verified hundreds of times)
  • You calculate faster (pattern recognition from deep analysis)

Real Example: One of my students rated 1800 started playing correspondence chess. Six months later, he solved a tactical puzzle rated 2400 in a tournament game - because he'd calculated similar lines 15 moves deep in his correspondence games. His OTB rating jumped to 2000.

Improvement #2: Position Evaluation Calibration

Engines teach you what "slightly better" actually means.

In OTB chess, you might think a position is "winning" when it's actually "+0.7" (slight advantage). Or you might resign in a position that's "-0.5" (holdable).

Correspondence chess calibrates your evaluation sense. After analyzing hundreds of positions with engines, you develop intuition for:

  • What +1.5 looks like
  • How to convert +0.5
  • When -0.3 is actually fine

Improvement #3: Opening Theory Depth

In OTB chess, you know your openings to move 10-12. In correspondence, you analyze to move 20+.

This doesn't just give you more memorization. It gives you UNDERSTANDING of why the opening works.

Example: You play the King's Indian Defense. In correspondence, you analyze the Bayonet Attack to move 25. You discover that after 16...c5 17.dxc6 Nxc6, Black's knight controls d4 and e5. This isn't theory you memorized - it's understanding you built.

Now in OTB play, when you reach move 16 in a slightly different variation, you KNOW what Black needs: control of d4 and e5. You find the right move even though the position is new.

Improvement #4: Endgame Technique Perfection

Endgames in correspondence chess reach textbook quality. Every move is precise. Every plan is optimal.

After playing 20 correspondence endgames, you've practiced technique at a level most OTB players never reach. You've converted R+P vs. R. You've held R+B vs. R. You've played opposite-colored bishop endings to perfection.

These patterns stick. In OTB endgames, you play with confidence because you've DONE this before, correctly.

Improvement #5: Strategic Planning

Correspondence chess teaches you to create PLANS, not just moves.

In OTB chess, you might think, "I'll improve my pieces and see what happens."

In correspondence chess, you create plans like: "I'll play ...Re8, ...Bf8, ...Bg7, improving my bishop to eye the long diagonal. Then ...Nd7-f6, doubling on the e-file. The plan succeeds if I can coordinate these pieces before White gets counterplay with b4."

This level of planning - concrete, sequential, goal-oriented - carries over to OTB play.

What Correspondence DOESN'T Train

Be honest about limitations:

Time Management: You have days per move. This doesn't help you manage 90 minutes over 40 moves.

Board Vision: Staring at a screen is different from staring at a physical board. Some players find their visualization suffers.

Psychological Resilience: Correspondence games are calm. OTB chess is stressful. You still need to train psychological toughness separately.

Quick Pattern Recognition: In blitz or rapid, you need instant pattern recognition. Correspondence trains DEEP recognition, not FAST recognition.

Correspondence chess is ONE tool in your training arsenal. Powerful, but not complete.

Getting Started

Ready to begin? Here's your practical guide:

Option 1: ICCF (Official)

Website: iccf.com

Process:

  1. Create a free account
  2. Start with "friendly games" (unrated)
  3. Play 3-5 friendly games to learn the interface
  4. Join a tournament (usually 5-7 players, round-robin)
  5. Earn an official ICCF rating

Pros:

  • Official ratings and titles
  • Serious players
  • Historical prestige
  • World championship cycles

Cons:

  • Slower games (10 days/move common)
  • Can take 2-3 years to finish tournaments
  • Less active community than Lichess

Rating System: ICCF ratings are typically 100-200 points higher than FIDE ratings. An ICCF 2000 is roughly FIDE 1800-1850.

Option 2: Lichess (Free & Active)

Website: lichess.org/correspondence

Process:

  1. Create free account (if you don't have one)
  2. Go to "Correspondence" section
  3. Start games with 3-7 day time controls
  4. Play as many simultaneous games as you want

Pros:

  • Free and open source
  • Large player base
  • Fast matchmaking
  • Flexible time controls (1 day to 14 days per move)
  • Excellent mobile app

Cons:

  • No official titles
  • Some players don't take it seriously
  • Rating inflation (easier to reach high ratings)

Recommendation: Start with Lichess. Play 10-20 games. If you love the format, join ICCF for official play.

Your First Games: A Battle Plan

Month 1: Start Small

  • Begin 2-3 correspondence games
  • Use only one engine (Stockfish)
  • Spend 30-60 minutes per move on critical positions
  • Keep a notebook: write down what you learn from each game

Month 2-3: Deepen Your Practice

  • Maintain 3-5 active games
  • Add a second engine (Leela or Komodo)
  • Increase analysis time to 1-2 hours for key positions
  • Join a correspondence chess forum (ICCF forums, Reddit r/chess)

Month 4+: Serious Training

  • Maintain 5-10 active games
  • Develop your analysis routine
  • Focus on openings you play OTB (learn them deeper)
  • Track your rating progress

Time Investment: 30-60 minutes per day, every day. Some days you'll just make 2-3 routine moves. Other days you'll spend 3 hours on a critical position. It averages out.

Engine Setup

Stockfish:

  • Download from stockfishchess.org
  • Use depth 30+ for analysis (takes 5-30 minutes per position)
  • Enable MultiPV 3-5 to see multiple candidate moves

Leela Chess Zero:

  • Download from lczero.org
  • Use 1-5 million nodes for analysis
  • Different evaluation style than Stockfish (more positional)

Interface: Most players use ChessBase, SCID, or Lichess's built-in analysis board. Choose what you're comfortable with.

Annotated Game #1: The Human Factor

Wen Yang vs. Leonardo Ljubicic ICCF 2019 | Correspondence | 1-0

This game shows how correspondence chess reaches a level of precision rarely seen in OTB play. Both players are master-level, both use engines, yet White finds a deep strategic idea that engines initially don't appreciate.

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bf4 0-0 6.e3 Nbd7 7.c5!?

Already a deep correspondence idea. This move scores 52% in the database but leads to positions where deep understanding matters more than engine evaluation.

The Point: White fixes Black's pawn structure, limits the scope of the light-squared bishop, and prepares a minority attack with b4-b5.

7...Ne4 8.Bd3 f5

Black seeks counterplay with ...g5 and ...Ng3. Engines give this as equal, but White has a long-term plan.

9.0-0 Ndf6 10.Qc2 g5 11.Bg3 Nxg3 12.hxg3

White has the h-file, Black has weakened the kingside. The position looks roughly equal (+0.2 for White). But White has a PLAN, and Black doesn't.

12...Bd7 13.b4 Be8 14.Rab1 Bg6 15.b5 Qe8 16.Rb4!

![Diagram: Position after 16.Rb4]

Key Moment. Engines suggest 16.a4 or 16.Rfb1. But White sees deeper.

White's Plan:

  • Ra4, attacking the a7 pawn
  • If Black defends with ...Ra8, White plays Rb1 and then Na4-c3-b5, invading
  • Black's pieces are tied to defense

Why Engines Miss This: At depth 25, this plan is still 7-8 moves away from paying off. Engines see it as equal. Humans understand it's uncomfortable for Black.

16...Ne4 17.Ra4 a6 18.bxa6 Rxa6 19.Rb1 Ra7 20.Na4!

The knight heads to b6, dominating the position.

20...Bf6 21.Nb6 Rc7 22.Qb2 Bg7 23.Qa3 Rf7 24.Rb4

White has infiltrated. Black's pieces are passive. The evaluation is now +0.8 (clear advantage).

24...Bf8 25.Qa5 Rc7 26.Ne5 Qd8 27.Qxd8 Rxd8 28.Nxg6 hxg6 29.Rxb7!

The breakthrough. White's plan, prepared over 20+ moves, culminates in winning the b7 pawn with a dominant position.

Game continued for 32 more moves. White converted methodically, demonstrating perfect technique in the endgame. Black resigned on move 61.

Lesson: Correspondence chess allows you to play plans that take 15-20 moves to mature. In OTB chess, you might not have time to calculate this deeply. In correspondence, you BUILD these skills.

Annotated Game #2: When Engines Disagree

Christoph Maurer vs. Wolfgang Uhl ICCF 2020 | Correspondence | 1/2-1/2

This game illustrates the most instructive moments in correspondence chess: when your engines give different evaluations.

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Bb7 10.d4 Re8 11.Ng5 Rf8 12.Nf3 Re8 13.Nbd2 Bf8 14.a3 h6 15.Bc2 Nb8

Black prepares ...Nbd7-f6, regrouping the knight.

16.b4 Nbd7 17.Bb2 g6 18.d5 Bg7 19.a4 c6!?

![Diagram: Position after 19...c6]

Critical Decision Point.

Stockfish 15 (depth 35): +0.75, prefers 20.dxc6 Bxc6 21.axb5 axb5 22.Rxa8 Qxa8 23.Qb3 with a slight edge.

Leela Chess Zero (5M nodes): +0.45, prefers 20.c4 maintaining tension in the center.

Human Decision Required: White spent 4 hours analyzing this position.

Stockfish's Logic: Trade immediately, simplify, convert the extra space.

Leela's Logic: Keep tension, prevent Black's pieces from coordinating.

White chose...

20.c4!

Following Leela's suggestion. Why?

White's Analysis Notes: "After 20.dxc6 Bxc6 21.axb5 axb5 22.Rxa8 Qxa8 23.Qb3, Black gets 23...Qc8! followed by ...Qa6, activating the queen. Stockfish evaluates +0.75, but I don't see how to make progress. With 20.c4, I maintain central tension and keep Black's pieces awkward. Even if Stockfish prefers the other move, I understand 20.c4 better."

This is correspondence chess mastery: Using engines to identify options, using human judgment to choose between them.

20...bxc4 21.Nxc4 cxd5 22.exd5 Rc8 23.Qd3 Rxc4 24.Qxc4 Qb6 25.Bc3 Rc8 26.Qd3 Qxb4 27.Reb1 Qd4!

Black achieves equality. The game continued another 30 moves and was drawn.

Lesson: When engines disagree, the human breaks the tie. The player who understands the position better wins - even in correspondence chess where both sides have engines.

Annotated Game #3: Correspondence Training Pays Off OTB

Michael Wiedenkeller (2050 FIDE) vs. Opponent (2180 FIDE) German Championship 2021 | Over-the-Board | 1-0

This game shows how correspondence training improved Wiedenkeller's OTB calculation.

Wiedenkeller had spent 18 months playing correspondence chess (ICCF rating 2220) before this tournament. His OTB rating was 2050, but his understanding had grown.

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 Qxb2 9.Rb1 Qa3 10.e5 dxe5 11.fxe5 Nfd7 12.Bc4

The Poisoned Pawn Sicilian - one of the sharpest openings in chess.

12...Bb4 13.Rb3 Qa5 14.0-0 Nxe5 15.Bf4 Nbc6 16.Nxc6 bxc6 17.Bxe5 Bxc3 18.Bxc3 Qxc3 19.Qxc3 Bxc3

![Diagram: Position after 19...Bxc3]

Engines evaluate this endgame as roughly equal (+0.3). Objectively, it's a draw.

But Wiedenkeller, drawing on hundreds of hours of correspondence analysis, saw something:

His Thought Process (post-game interview):

"In correspondence chess, I'd played similar pawn structures 15 times. I knew that with bishops off the board, White's kingside majority becomes powerful. Black's c6 pawn is weak, and the bishop on c8 is bad. If I can create passed pawns on the kingside, Black will be tied down.

"This is the kind of position where you need to know the PLAN, not just calculate tactics. Correspondence chess taught me the plan."

20.Rxc3 Bb7 21.Rc5!

Activating the rook, preventing ...c5.

21...0-0 22.g4! Rfc8 23.Rxc6 Rxc6 24.Bxc6 Bxc6 25.h4

White's plan in action: create kingside passed pawns.

25...Rb8 26.g5 Rb2 27.Rc1 Bb7 28.Kg2 h6 29.h5 hxg5 30.Rc7

![Diagram: Position after 30.Rc7]

White's seventh rank domination is decisive.

30...Bc8 31.Kg3 Rb5 32.Rc5 Rb3+ 33.Kh4 Re3 34.Rxg5 Re4+ 35.Kg3 Re3+ 36.Kf4 Ra3 37.h6! gxh6 38.Rxg5+ Kf8 39.Rg6

Black resigned. The h-pawn will promote.

Lesson: Wiedenkeller's opponent was rated 130 points higher. But Wiedenkeller's correspondence training gave him UNDERSTANDING of this endgame type. He played with the confidence of someone who'd analyzed similar positions for hours.

Post-Game Quote: "I've converted this type of endgame 5 times in correspondence chess. I knew it was winning. I just had to play accurately. That confidence comes from correspondence training."

EXERCISES

Exercise 1: Start Your First Correspondence Game

Task: Register on Lichess.org and start a correspondence game with 3-day time control. Play at least 10 moves, spending at least 30 minutes on each move.

Deliverable: Write 3 paragraphs describing:

  1. What felt different from OTB chess
  2. What you learned from using an engine
  3. One mistake you almost made but caught through deep analysis

Exercise 2: The Disagreement Exercise

Task: Find a position where Stockfish and Leela Chess Zero disagree (evaluations differ by 0.3+). Analyze both suggested moves to depth.

Deliverable: Write 500 words comparing both moves. Which did you choose and why?

Sample Position to Analyze:

Position: After 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 0-0 10.0-0-0 Nbd7 11.g4 b5 12.g5 b4

Run Stockfish and Leela. They'll likely disagree on White's 13th move. Study both. Decide.

Exercise 3: Deep Calculation Practice

Task: Take a correspondence game you've played. Choose one critical position. Calculate the main line 15 moves deep WITHOUT using an engine first.

Deliverable: Write your calculation, then check with an engine. How many moves did you see correctly? Where did you miscalculate?

Exercise 4: Opening Deep Dive

Task: Choose one opening you play regularly. Start a correspondence game with that opening. Analyze the first 15 moves to a depth you've never reached before.

Deliverable: Create a detailed opening file with:

  • The main line to move 20
  • 3-5 critical positions with deep notes
  • Key plans for both sides
  • Common mistakes to avoid

Exercise 5: Endgame Mastery

Task: Play a correspondence game to the endgame (20 pieces or fewer). Convert a favorable endgame or hold a difficult one.

Deliverable: Write 300 words on what you learned about endgame technique. Include the final position and your key decisions.

Exercise 6: Game Analysis Report

Task: After finishing a correspondence game (win, loss, or draw), write a full analysis report.

Required Sections:

  1. Opening choice and preparation
  2. Critical moments (3-5 positions)
  3. Mistakes and missed opportunities
  4. What you learned
  5. How this will improve your OTB play

Length: 1000-1500 words.

Exercise 7: Engine Dependency Check

Task: Play one correspondence game where you DON'T use an engine until you've calculated each move fully on your own first. THEN check with the engine.

Deliverable: Compare your evaluations with the engine's. Where did you agree? Where did you disagree? What does this reveal about your chess understanding?

Exercise 8: Time Management Experiment

Task: Track your time for each move in a correspondence game. Create a chart showing:

  • Routine moves (under 15 minutes)
  • Important moves (15-60 minutes)
  • Critical moves (60+ minutes)

Deliverable: Analyze your time distribution. Are you spending time wisely? Where should you invest more time? Where less?

Exercise 9: Opponent Modeling

Task: In a correspondence game, study your opponent's previous games (most servers show game history). Identify their tendencies:

  • Do they prefer tactics or positional play?
  • Do they take risks or play solidly?
  • What openings do they struggle with?

Deliverable: Write a 300-word "scouting report" on your opponent. Use this to inform your move choices.

Exercise 10: The Ultimate Test

Task: After playing 10+ correspondence games, return to OTB chess (blitz, rapid, or classical). Play 5 games.

Deliverable: Write a reflection (500 words):

  • Did your calculation improve?
  • Did you find moves faster?
  • Did you evaluate positions more accurately?
  • What specific improvements did you notice?
  • What still needs work?

Key Takeaways

  1. Correspondence chess is where engines are LEGAL. It's human+engine vs. human+engine. The human part wins.

  2. Deep analysis methodology: Breadth first (find the right move), depth second (calculate it fully).

  3. When engines disagree, you learn the most. These are the moments where human judgment matters.

  4. Correspondence chess builds habits: Deep calculation, accurate evaluation, strategic planning, endgame precision.

  5. Limitations exist: Correspondence doesn't train time management, board vision, or psychological resilience.

  6. Start small: 2-3 games, 30-60 minutes per day. Build from there.

  7. Write analysis notes. Understanding matters more than finding the "best" move.

  8. Correspondence training transforms OTB play. Strong correspondence players see deeper and calculate faster over the board.

  9. ICCF for official ratings, Lichess for practice. Both have value.

  10. Patience is required. Games take months. But the skills you build last a lifetime.

Practice Assignment: Your First Correspondence Journey

Here's your 30-day correspondence chess program:

Week 1: Foundation

  • Register on Lichess
  • Start 2 correspondence games (3-day time control)
  • Spend 30-60 minutes per move
  • Use Stockfish only
  • Keep a notebook of what you learn

Week 2: Deepen

  • Start 1-2 more games (now 3-4 active)
  • Add Leela Chess Zero to your analysis
  • Increase time to 1-2 hours for critical positions
  • Write analysis notes for key decisions

Week 3: Learn

  • Find one position where Stockfish and Leela disagree
  • Spend 3 hours analyzing both sides
  • Write 500 words on your decision process
  • Share your analysis with a correspondence chess forum

Week 4: Integrate

  • Maintain 3-5 active games
  • Play 5 OTB games (any time control)
  • Write a reflection: "What has correspondence chess taught me?"
  • Decide: Will you continue? If yes, join ICCF or increase Lichess games to 5-10.

Goal: By the end of 30 days, you should have:

  • Finished at least 1 correspondence game
  • Made 40+ correspondence moves
  • Analyzed 10+ positions deeply
  • Written 2000+ words of analysis
  • Noticed improvement in your calculation depth

This is how you train like a master. Slowly. Deeply. Permanently.

⭐ Progress Check: Are You Ready for Deep Chess?

Before moving to the next chapter, ensure you can:

✅ Explain what correspondence chess is and why engine use is legal

  • Can you describe the format to a friend?
  • Do you understand why human+engine is harder than it sounds?

✅ Execute the 7-step correspondence workflow

  • Can you analyze a position from first impression to final move?
  • Are you comparing multiple engine suggestions?

✅ Write analysis notes that explain positions

  • Are you writing WORDS, not just moves?
  • Can you explain why a move is strong, not just that it's +0.5?

✅ Recognize when engines disagree and make human decisions

  • Have you found a position where Stockfish and Leela differ?
  • Did you analyze both and choose based on understanding?

✅ Maintain 2-3 active correspondence games

  • Are you spending 30-60 minutes per day on correspondence chess?
  • Have you completed at least one game?

✅ Identify how correspondence training improves OTB play

  • Can you name 3 specific skills correspondence chess builds?
  • Have you noticed improvement in your calculation depth?

If you checked all six, you're ready to continue. If not, spend more time on correspondence games before proceeding.

Remember: Correspondence chess is a long-term training tool. You won't master it in a week. But after 6 months of consistent play, you'll be a different chess player.

🛑 Rest Marker

You've just learned about the ultimate chess training ground. Correspondence chess is intense mental work - even though it's spread over days.

Take a break. Let the concepts settle.

When you return, you'll tackle advanced tournament preparation in Chapter 39. But for now, start your first correspondence game. Experience chess at a depth you've never reached before.

The board is waiting. You have days to think.

Make it count.

"The beauty of correspondence chess is that it reveals the truth of the position. No time pressure, no psychological tricks, no excuses. Just pure chess." - GM Artur Yusupov