Checks and captures

We are always admonished that to blunder-proof our chess, we must search for checks, captures and threats on every move, for ourselves and our opponents.

This is not so easy to practice — how do you know when you’ve missed something, except when a gleeful opponent swoops in to take an overlooked loose piece?

The answer is now at hand:

Here are two sets of positions selected at random moments from a selection of master games.

Random positions: https://lichess.org/study/gC1AGen6

Random shuffled positions: https://lichess.org/study/RNvhutHd

The second set is the same positions, but with the piece positions randomised.

Both sets of positions have the number of checks and captures available to each side counted.

Random positions, checks and captures counted: https://lichess.org/study/tYjkWV8P

Random shuffled positions, checks and captures counted: https://lichess.org/study/lM4Wqeyw

So now you can find out when you are missing something!

[I haven’t counted threats.  What is a threat?  Maybe it’s a check or a capture one move hence, or two moves hence, or some sort of tactic… I can’t count those.]


UPDATE: Daniel Fone has a website to do all this interactively: https://chessr.app/vision/

SFD1958 MOT

STUDY: https://lichess.org/study/30VwW7Ah/

I downloaded your last 50 games, banged them through the computer analysis, and did some sums.

  1. THE ANALYSIS.  The game analysis compares the players’ chosen moves with the likely best moves.  Deviations from the best moves are put into three categories: inaccuracies, mistakes, and blunders.  To change the expected game result, I’d say you need either just one blunder, two or three mistakes, or a good sprinkle of inaccuracies.  But that’s the expected game result against perfect play from the opponent — against an imperfect opponent, you might get the chance to make several blunders in a game without losing, because your opponent is also making mistakes. [While you are making blunders in most games, it’s probably not worth worrying about mistakes and certainly not inaccuracies.]
  2. THE BOT. At any point in a chess game, you might have 30 moves available.  The best of these will maintain or improve your position, while the worst might lose a piece, or worse.  As I understand it, the Lichess AI bots at different levels might be programmed to (a) avoid the top-rated move (or moves) available, either often or all the time, and also (b) at random moments, throw in one of the much lower-ranked moves, that are mistakes or blunders.  [This means that occasionally when you make a capture, the bot will fail to make the obvious recapture.]
  3. THE SUMS.  Games: 50.  Moves: 2105.  Results: W7 D5 L38.  Blunders: SFD1958 319; LichessAI3 267.  Rate of blunders per move: SFD1958 15%; Lichess AI3 13%.  Most blunders in one game: SFD1958: 23; Lichess AI3: 22 (game 45 in the study).

“…sometimes I don’t lose, and for the life of me I can’t figure out what I did different.”

No, I can’t either!  I looked closely at your six wins and a few losses, without spotting much.

One view of what is going on is that it’s random(*), and you don’t do anything different in the games that you win.  Alternatively, you might be more careful sometimes, and that’s when you win.

Do you always play without distractions?  With full concentration?  Is it possible that you are more careful in your winning games?  [And if you don’t know that, then I can’t tell that.]

If that’s not the key to your wins, I think it’s just that the bot is coming up with more and bigger mistakes earlier than you are in some games, through the workings of chance.

One argument to say it’s just chance is that your overall blunders-per-move rate in all your games is 15%, and in the games you win it is a similar 11%.  But it could be a bit lower, so that’s when you win?  7 games is not enough to draw very robust conclusions.

If you want to win a few more games:

  1. Make more captures!  Every so often you can expect your opponent not to recapture and you will go a piece ahead.  Also some moves it makes are bluffs, they are not really safe
  2. Have a peek at some of the computer analysis — make sure you understand why each of your blunders were blunders — and what move you should have played.  That could do a lot to improve your understanding of the games and give you ideas for next time.  [Spoiler alert — lots of missed take-a-piece-for-nothing and lots of missed attackers-outnumber-defenders and plenty of missed forced checkmates.]
  3. There’s some exercises you can do which will probably reduce your error rate.
    https://devonjuniorchess.co.uk/wp/drdaveexeter/2025/12/25/blunderproofing-your-chess/
  4. But if you’re enjoying what you’re doing, carry on!

(*) Suppose you’re playing a game with two dice.  If you get a six on the yellow die, you get damage, and then you roll the red die to see how much damage you get from 1-6.  So, every 6 turns, you might expect to pick up 3-4 points of damage.  Keep rolling.  Your opponent does the same.  You get damage, your opponent gets damage, sometimes you get more damage hits in a row, sometimes they do.  If you have 12 points of damage more than your opponent, you lose.  If you use the same dice, you should expect to win half of the games.

But maybe your opponent cheats, and has biased dice — their yellow die is less likely than yours to show a six — maybe 1/8.  So, you now expect to lose more than you win.  But you won’t lose all of them: if you’re lucky, your opponent will accumulate their 12 points of damage before you do.

That may be what is going on with you and Lichess AI3.  You have a chance of making a blunder on every move, and given long enough, you will probably make enough big blunders to lose, but maybe your opponent won’t take advantage of the chances you give them, or they will make a blunder.  In some games, your opponent finds enough big blunders to get a lost game before you do.  But it’s mostly a matter of chance.

 

Blunderproofing your chess

YouTube short

YouTube video

TL;DR: (1) do puzzles (slowly and carefully) to learn tactical patterns — doing more easy ones and getting them all right is more important than doing any faster or harder puzzles; (2) on each turn, look all round the board for checks and captures (this move and next) that might add up to a tactic; (3) get into the habit of checking your move before playing it; (4) get these good thinking habits bedded in by playing slow games (speed up later)

STL; ADR: practice not blundering.

The good news is that you can reduce the blunder rate in your games, and you do it by:

  1. SOLVING.  Making sure you are sharp tactically — that you know all the tactical patterns and can work out the mechanism — by doing regular tactical puzzles. Try and do puzzles that don’t have a time limit and commit to a move only once you’re sure you have seen all that there is to see. (Concentrate on ‘how many can I get completely right in a row’ not ‘how many puzzles can I guess the right move for 5 minutes’.  In the days of books, I used to say, write down all the variations before looking up the answer.)
  2. Knowing enough tactical patterns is not the whole story.  The puzzles you are offered online are perfect for developing your tactical ceiling (what’s the hardest you can ever do when studying) but not so good for raising your tactical floor (what’s the simplest you still miss in a game), for which you need to look at easier puzzles but repeat them.  A good book for such drills is something like Hays’ Winning Chess Tactics, or the endgame exercises from Thomas Willemze, or the Woodpecker Method.
  3. LOOKING.  In a game, you also have to check for blunders — yours and your opponents’, before you decide on a move.  Always look for both sides.
  4. Look twice: once after your opponent moves (what are they up to?) and once after you move (what am I about to let them do?).  I often hear: I saw what was wrong with the move, the moment after I played it!  Your task is to bring that moment of realisation a second or two earlier, before you commit to the move!
  5. Always look at forcing moves – checks and captures — which are the easiest sort of moves to analyse and often contain tactical treasure. As Purdy says, “Examine moves that smite!
  6. And look all around the board — not  just at the bit that was most recently busy.
  7. SLOWING.  I wonder if another reason you miss things is because you sometimes move too fast. (Again, that is a very familiar finding.) Some blunders happen with a move that a player had thought about for a few seconds, and I’d be surprised if a few more moments’ thought wouldn’t save you some embarrassments in your games.   You have to practice not blundering — by playing slowly and carefully, and getting into the habit of checking your moves before playing them — you will become more careful and can then speed up.
  8. This sort of care cannot be practised when playing blitz and it is not easy to do in rapidplay games — so I suggest you start playing some ‘classical’ time control games or at least slower rapid games, or even correspondence games and using as much time as you need.  It’s easier to add speed to your game once you are careful, then you can still be careful while still playing quickly. (Think about how we learn to play music, or drive a car — slowly and carefully first!)  Playing slowly also gives you the chance to look for hidden threats and to find the most accurate move.
  9. Use all your time — or, aim to use most of your time in most of your games.  Some games I see that go on for 30-40 moves, but the players still had more than half their time left. That’s OK for games you win, but if you lose…There are no extra points for having time left at the end of the game!
  10. A useful habit to get into is to make yourself choose between two moves.  Rather than think of a move then ask yourself if it’s OK, think about two or more moves, and try and work out which one might be the best, and why.  I hope this will open your eyes to more opportunities as well as threats against you.  It does take more time!
    Coaches often quote Emanuel Lasker:

“When you see a good move — look for a better one!”

[I’m not sure Lasker ever said that, but Ponziani did.]

You don’t get rid of blunders overnight, but you should aim to get the rate down from one in every 10 moves to one in 20, one in 30 and so on.  If you have access to a computer opponent (e.g. online bot), play games where all you are trying to do is not blunder — aim for 15 moves without a blunder, then 25, 35… — and stop the game the moment you miss something and start another.

And once you get rid of one-move blunders, you can work to eliminate two-movers and calculation errors.

See also: Blunders2019 slideshow

ChatGPT can make mistakes.

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