1. d2d4  1... d7d5  2. c2c4  2... c7c6  3. g1f3  3... g8f6  4. b1c3  4... e7e6  5. c1g5  5... b8d7  6. e2e3  6... d8a5 The Cambridge-Springs Variation is a more solid choice for Black than the complications of the Botvinnik System with 6...dxc4. For those interested in classic games with this system, I suggest studying games 7, 9 and 11 of the match Capablanca vs. Alekhine. 7. c4d5  7... f6d5  8. a1c1  8... h7h6 It's usually difficult to know if the ...h6 move is useful; I have doubts about this in several defenses. Many players prefer to take on c3 right away. Others choose 8...Bb4. 9. g5h4  9... d5c3  10. b2c3  10... f8a3  11. c1c2  11... b7b6 [%c_effect b6;square;b6;type;GreatFind;persistent;true] This plan is essential for Black: playing the bishop to a6 and simplifying the position a bit. 12. f3d2 [%c_effect d2;square;d2;type;Interesting;persistent;true] A relatively rare move, but one that has been tried in some correspondence games. 12... c8a6  13. c3c4 The most natural move. 13... e8g8  14. f1d3  14... c6c5  15. e1g1  15... c5d4  16. e3d4  16... f8e8  17. d1e2  17... a8c8 [%c_effect c8;square;c8;type;Inaccuracy;persistent;true] This move is inaccurate and leads to problems. The correct path is shown in one of the correspondence games. 18. c4c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] There are two possible doubles for the d2-knight: one on c4 and one on d6. 18... a5a4 [%c_effect a4;square;a4;type;Inaccuracy;persistent;true] This move makes things worse. 19. d3a6  19... a4c2  20. a6c8  20... e8c8  21. e2a6 [%c_effect a6;square;a6;type;GreatFind;persistent;true] A very unpleasant move. Black has no good squares for the rook. 21... c8c7  22. h4g3 [%c_effect g3;square;g3;type;Inaccuracy;persistent;true] 22... e6e5  23. d2f3 [%c_effect f3;square;f3;type;GreatFind;persistent;true] The best. 23... a3c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] Black has to sacrifice a piece. 24. d4c5  24... d7c5  25. a6a3  25... f7f6 Let's pause and assess the position. White has a material advantage (bishop for two pawns), but it is not easy to convert: the bishop on g3 is not good. 26. f1c1  26... c2g6  27. f3h4 I don't like this move. A knight on the rim is dim, someone said. 27... g6f7  28. c1d1  28... c7d7  29. d1d7  29... f7d7  30. h2h3  30... e5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] Now the h4-knight is in trouble. Black prepares g5. 31. g3b8 [%c_effect b8;square;b8;type;GreatFind;persistent;true] A very good, practical decision. White gives back material to capture Black's queenside. The computer suggestion is absurd for a human. 31... g7g5  32. a3a7  32... g5h4 [%c_effect h4;square;h4;type;Inaccuracy;persistent;true] Now Black is in deep trouble again. 33. a7b6 