Challenge from Bean

Chess960
Start Position: 35
'Standard' (30 days + 1 day/move, max 45 days)
This game is being played under Chess960 rules. Click the 'info' tab for more information.
1. e4 e5
Clock started on 5/6/2017
2. d3 b6 3. Ne2 d5 4. Ng3 d4 5. Nd2 g6 6. Nf3 c5 7. Ne2 Bc6 8. b3 a5 9. g3 Bd7 10. a4 Bf6 11. h3 Bxh3+ 12. Bg2 Bg4 13. Rh1 O-O 14. Qb1 Qd7 15. Nfg1 Bxe2+ 16. Rxe2 Ne7 17. Bh3 Qd8 18. Nf3 Nbc6 19. Qc1 h5 20. g4 hxg4 21. Bxg4 Bg7 22. Bb2 f6 23. Ba3 Kf7 24. Re1 Rh8 25. Bh3 f5 26. exf5 gxf5 27. Ke2 f4 28. Reg1 Reg8 29. Qf1 Bf6 30. Rxg8 Qxg8 31. Rg1 Qh7 32. Rh1 Ng6 33. Bg2 Qg7 34. Ng1 Rxh1 35. Bxh1 Nce7 36. Be4 Nh4 37. Bc1 Qg4+ 38. Kd2 Bg5 39. c3 dxc3+ 40. Kxc3 Qe6 41. Kc2 Nd5 42. f3 Nb4+ 43. Kb2 Qd7 44. Nh3 Qd4+ 45. Kb1 Bf6 46. Qe1 Nxd3 47. Qd2 Nb4 48. Qxd4 cxd4 49. Nf2 Ke6 50. Bd2 Be7 51. Kb2 Nd5 52. Nd3 Nf6 53. Ne1 Nxe4 54. fxe4 Ng6 55. Nd3 Nh4 56. Be1 Nf3 57. Bf2 Nd2 58. Kc2 Nxe4 59. Be1 Ng5 60. Bh4 Kf5 61. Bxg5 Bxg5 62. Ne1 Ke4 63. Kd2 f3+
Black win

Many chess masters valued the challenge of playing chess with a non-standard setup as a way to break out of the opening play doldrums. Chess960 (Fischer Random Chess) plays like Standard Chess with the exception of a randomly generated opening setup of pieces behind the 8 pawns. The game is quite popular and played even by top chess grandmasters, like Svidler or Leko.

 

1. The rules

Most of the standard chess rules are in place. The only exceptions are:

  • pieces are randomly shuffled on the first/last rank (the only restrictions are that bishops have opposite colors and that the king must be somewhere between the rooks, black setup mirrors white),
  • castling rules are generalised to accomodate varying initial setup.

Example initial setup (one of the 960 possible):

rkbnrnqb/pppppppp/8/8/8/8/PPPPPPPP/RKBNRNQB

Castling rule is easy to memorize: after castling, king and rook move to the squares they would land in standard chess (after O-O we have Kg1 and Rf1, after O-O-O Kc1 and Rd1). Typical chess restrictions apply - none of the castling pieces moved, source and destination squares are empty, king path is free of any pieces and not under opponent attack. SchemingMind interface shows castling icons whenever castle is possible.

O-O looks fantastic in the above setup, doesn't it? And require some work to prepare... But in setups with Kf1 and Rg1, one can play O-O as the first move of the game.

Except those, all standard chess rules apply, be it en-passant, pawn promotion, stalemate, or whatever. Once both sides castled there is no difference between chess960 and standard chess game (although the middlegame positions are sometimes unique - thanks to nontypical development of pieces or pawn structures).

 

2. Why play it?

Escaping long, well known, opening lines of standard chess is obvious advantage of chess960. We are again in the world where one must work from the very beginning of the game. It is fun, it is also valuable training for standard chess players (learning to think during opening stage helps when one meets unexpected line in usual chess).

Less known feature is that chess960 frequently creates middlegame configurations (from pawn structures, to piece layouts) rarely or never met in standard chess, giving way to nontypical combinations. Fun, but also good training to search for new tactical patterns.

 

3. Tips and tricks

Below a few tips for people starting chess960.

1. This is normal chess. The middlegame and endgame knowledge applies as-is. Basic opening principles (develop, castle, claim center, be active) also apply. Memorize castling rule quoted above, and you can play.

2. Spend some time studying initial setup. Are there diagonals you can quickly claim? Which side do you expect to castle? What are undefended or poorly defended pawns and squares? Which pieces can be difficult to develop?

3. Remember about activating all your pieces. There are chess960 setups, in which some pieces are difficult to develop (for example, imagine setup with queens on a1 and a8, especially if there are bishops on h1 and h8). It can pay off to sac some material, but to bring all forces into the battle quickly.

4. Avoid chess960 errors. One can see solid chess players hanging pieces, allowing for major forks, or even blundering a mate in one or two in chess960 games (see for instance cruel miniature , quick knight mate or devastating fork at move 3). The reason is that pieces are differently organised than in normal chess. Some patterns can be similar to known chess setups, and instinctively seen so, but allow for an attack, which in normal chess would not work. Those examples prove also, that one must be alert from the very beginning of the game.

5. Recognize weak squares. Everybody know about weaknessess of f2 and f7 in standard chess, in chess960 (depending on setup) there can be even squares which are not defended at all. Spot them, exploit them, defend them.

 

4. Instructive games

Selected example games:

Develop to win - white picks better development plan and manages to organise threatening attack before black coordinates his forces

The Queen problem - interesting game, which in particular illustrates the problem with developing queen in some setups; note also phantasy castling at move 14 and interesting endgame,

Castling on the first move - also, interesting example of development in rather difficult configuration (knights in corners)

Another early castling - plus just another example of interesting development problems (note difficulties black face with activating the queen, and both sides have with h bishops)

More links to instructive chess960 games played on schemingmind, are welcome. In particular, it would be nice to find:

more examples of exploration of weak square(s)

illustration of sacrificing some material to activate pieces,

closed position with pawn structure not likely to happen in standard chess,

 

5. Position number

The position number is a number from range 1 to 960, which in unique way describes the initial position. Exact algorithm (initially described by R.Scharnagl in his German book about the game) is not usually important, but if you are interested, see chapter 5 on this page. In short: if you write the position number in binary notation, then the lowest two bits encode position of light-square bishop, next two bits the position of dark-square bishop, then the rest of pieces are encoded.

 

6. Valuable links

See this journal article for a few commented games and some links to Chess960 sites.

links to chess960 sites are welcome


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