Fully numeric chess notation

http://www.blindfoldchesstrainer.com/

this helps a lot.

Thanks g-man15, you're right.  I spent years not knowing, and then learned in 10 minutes how to instantly determine the color of every square.
Has anyone beaten 10 seconds on color of square at http://www.blindfoldchesstrainer.com/blindfoldtrainer.php ?

wow. 10 sec. is really fast. my best is still like 18.

Same diagonals is a little tougher, and I have only gotten to 14 seconds.  What I'm doing is subtracting the numbers and then subtracting the letters, and seeing if they are equal.  So for D4 H8, I do 8-4 = 4 and H - D (8 - 4) = 4, 4=4, same diagonal.  And for A7 E2, it would be 7-2 = 5 and E - A (5 - 1) = 4, 5 =/= 4 so they're on different diagonals.  It would be even easier without having to convert from algebraic to numeric notation.  For the color game, I'm just looking at the number and letter and if they're both even or odd, it's black, but if it's one and the other, it's white.

Same colors is also pretty tricky.  I could only get 13s on that one.  I think this has helped a lot, though, thanks again.



I think the 2 knights game has some bugs.  I got it wrong several times after clicking the correct answer (especially when one square was on the rim).

Yep, and it's sometimes used in international correspondence events, especially if you are doing snail mail.

If you take the Najdorf, 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6, I believe it looks like this (I think - hope I didn't screw it up):

5254 3735
7163 4746
4244 3544
6344 7866
2133 1716

Reb - Feel free to correct me if I'm wrong.

Its correct and I used to play in the ICCF back in the 80s and 90s with snail mail and had to use that notation . It took some getting used to and I don't miss it . 

I really like this idea and just had the same thought!  I'm finding this forum only now.  I think they should still use letters in combination with the squares for efficiency.  Also, you can still simplify and avoid using P for pawns just like before:

e4 = 54

dxe4 = 4x54

Bh8 = B88

It doesn't have to be ALL numbers in the notation, just the actual squares.  I know the whole chessboard in terms of algebraic notation too, but there are some advantages to numbered squares.  A person can learn almost any system, but thinking in terms of the number is very simple in most people's heads.  Ottospielen mentioned a few other advantages, such as light squares are "different odd/even digits" and dark squares are both even or both odd.  

If it is such a great system why has this 11 year old thread got barely two pages of comments ?

Habit of the status quo, perhaps.  I understand the resistance to it, as maybe it'd be a hassle to speak a new language of notation.