Hello GL P: Since 1985, when I started playing in all the casinos where I lived, and until approximately 2000, I recorded cash, profits-losses and representation expenses in detail. From 2000 until I retired, I had a routine in mind and did things mechanically. I left home or the hotel with a fixed amount and the next day, after returning, I simply saw differences after resting.
I know John Solitude from his programs and posts on specialized pages from the second half of this century.
He had a good ranking in the programmers' ranking along with Lohnro, Turbegenius, St0rm0r, Lonerider, Nireaper, Chairminator, Sharp, Kevin Nash, Crilley, etc., etc. I myself occupied the No. 1 position in the world ranking in November 2011 due to the quality and quantity of systems made known and the votes of users.
John is a versatile guy
Roulette sites and chat rooms don't usually last long. People get tired of trying out other people's stuff and not working on their own and improving as many things as there are things that can be improved; you know that...

La forma de juego mas parecida es la del "carro". Si sales primero y pones en el centro, según la forma tradicional del juego, y no cometes errores, ganas. Se trata de ir acotando las posibilidades del azar cubriendo zonas amplias. En algún momento, mas temprano que tarde, debe pisar la zona cubierta. La única posibilidad que tiene es sacar 5 ceros seguidos, repetir hasta la saciedad 4 o 5 números no cubiertos y todo esto hacerlo en menos de una docena o docena y media de bolas.
Eso, que puede suceder, lo puede hacer una vez en muchas, muchísimas  bolas. Aunque existe la posibilidad del "cisne negro negativo", comenzaría a pensar que hay algo mas detrás de esa "azarosa " coincidencia si en menos de 5 o 6 meses jugando a diario y consumiendo muchas, muchas horas de juego en el paño, vuelve a ocurrir. Es todo lo contrario de lo que este juego necesita que es 5 o 6 sesiones de pocas bolas, con lo cual, la posibilidad de esos sucesos se aleja diametralmente de que pueda ocurrir tan seguido; simplemente por "probabilidad".
Recuerdo una anécdota que Atila contaba de su juego a 9 plenos en la que recordaba como en Enero del 81 en Estoril jugando al 9,12,15,18,21,27,30 y 33 perdió. En una larguísima sesión progresionando con su genuíno estilo 1....1....1....1....1....1....1....1.....1      2.....1.....1.....1.....1....1.....1....1.....1    2.....2.....1.....1....1.....1.....1.....1.....1
etc...etc agotó caja cuando nunca había pasado de los 6.....5.....5.....5.....5.....5....5...5....5

Comentaba que en 27 bolas llegó a ver 8 ceros, cuatro de ellos seguidos, algo inédito en sus permanencias personales; pero el azar es así...

Y otro día mas...

Spreadsheets updated.

Session from now.
9 numbers selected.

Today session.
8 numbers selected with the more hits.
Permanence.

Zechnas - You can use too the old sheet by John Solitude xls Balance Book keeper to keep track of the sessions played, but his site no longer exist today.That was good site with lots of information about Roulette at that time (2006-2009).
----------------
John Solitude's
Excel Gambling Balance Bookkeeper Spreadsheet

Ever wondered how much money you spend on gambling?
Ever wondered how good or bad you really did at the end of the year?
Or in which venues and games you managed to win some or loose some?
Keeping track of your balance is essential to develop an objective view on your wins and losses (and knowing when it's time to cheer or quit).
It's only a matter of introducing your wins and losses for each session and each game, to find out the truth about your gambling expenses.
This is the very same spreadsheet we use to check our balance.

You can use too the old sheet by John Solitude xls Balance Book keeper to keep track of the sessions played.
----------------
John Solitude's
Excel Gambling Balance Bookkeeper Spreadsheet

Ever wondered how much money you spend on gambling?
Ever wondered how good or bad you really did at the end of the year?
Or in which venues and games you managed to win some or loose some?
Keeping track of your balance is essential to develop an objective view on your wins and losses (and knowing when it's time to cheer or quit).
It's only a matter of introducing your wins and losses for each session and each game, to find out the truth about your gambling expenses.
This is the very same spreadsheet we use to check our balance.

So far 6 sessions.

Another session.
9 numbers selected.Good number of hits.