2017 Chess Variants Dropout Tournament, Krieg

'Fast' (10 days + 1 day/move, max 30 days)
This game is being played under Kriegspiel rules. Click the 'info' tab for more information.
1. d4 b6
Clock started on 2/24/2018
2. c4 Bb7 3. Nf3 e6 4. e4 d5 5. exd5 exd5 6. Bf4 Bb4+ 7. Nc3 Bd6 8. Bd3 Ne7 9. Ke2 Nd7 10. Qc2 c5 11. h4 Qc7 12. a3 O-O-O 13. Rh3 h5 14. Bh2 Ng6 15. Rd1 Rde8+ 16. Kd2 Nf4 17. Ne1 Ne2 18. Nxe2 Rxe2+ 19. Kxe2 Ba6 20. Rd2 Kb8 21. Kd1 dxc4 22. dxc5 Nxc5 23. Bxc4 Bxc4 24. Rc3 Be6 25. Bg1 Rd8 26. g3 Be7 27. Ke2 Rd7 28. f3 Qd8 29. Bf2 Bxh4 30. gxh4 Rxd2+ 31. Qxd2 Qf6 32. Qc1 Ne4 33. fxe4 Qd8 34. Nc2 Qd1+ 35. Qxd1 Bf5 36. Qg1 Bxe4 37. Ke3 Bc6 38. Kd3 Kb7 39. Nd4 a5 40. b3 Ka6 41. Ke3 b5 42. Rc1 a4 43. bxa4 bxa4 44. Nb5 Ka5 45. Qg3 Kxb5 46. Rg1 Kc4 47. Kf4 Kb5 48. Ke5 Kc4 49. Be3 Kb3 50. Bg5+ Bf3 51. Kd6 Kxa3 52. Be7 Kb2 53. Kd7 a3 54. Bxa3+ Kxa3 55. Rg2 Kb4 56. Qf2 Bxg2 57. Qxg2 g6 58. Qg5 Kc4 59. Ke7 Kd4 60. Kxf7 Ke4 61. Kxg6 Kf3 62. Kxh5 Ke4 63. Kg6 Kf3 64. h5 Ke4 65. Qf6 Kd5 66. h6 Ke4 67. h7 Kd5 68. Qf7+ Ke5 69. h8=Q+ Ke4 70. Qhe8+ Kd4 71. Qfd7+ Kc5 72. Qec8+ Kb6 73. Qdb7+ Ka5 74. Qca8#
White win

(Under Construction, Diagrams to be added)

The name for this game is German for "War Game". You do not see your opponent's forces.

Game Rules

The pieces are initially set up according to standard chess rules.

Opponent's pieces and pawns are hidden. The following detailed visibility rules are in place:

  • all your pieces are visible,
  • all pieces belonging to the opponent are invisible (not displayed in any way),
  • you can not see which pieces you have taken
  • you are told after each move only how many pieces your opponent still has,
  • you are told after each move if you have captured a piece (for example, 'Rx?') However, you can not tell which type of piece you have captured.
  • Your opponent's moves are displayed as question marks (however, they are appended with '+' and '#' for check and mate, and '?xR' indicates you have just lost a rook! ).

 

8/8/8/8/2P5/N2PPN1P/PPQBBPP1/R3K2R
Example Kriegspiel board after a few moves. There is no information which black pieces are present on the board and where they are placed.

Piece movement is exactly as in standard chess. However, the first legal move that you attempt to make is final. There is no Submit button! This means that when it is your turn to move, and you pick up a piece and drop it in any (legal!) square, that constitutes your move - no takebacks!

You may try illegal move, in such case the attempt fails and you can try something else.

The game is ended with mate, resignation, stalemate (which is draw), or draw agreement. There is no 50-move rule, or 3-fold repetition (you can't know whether they happened, after all).

Note: if you wish to resign, you must enter a move with your resignation (select Resign and then make any move), since there is no submit button.

Hints

Elementary tips

Many players test all possible pawn captures before attempting any other moves. Since a pawn move is different from a capture, this allows the player to attempt these pawn captures before committing to a non-capture move.

Just as in standard chess, you must get out of check as your first priority. However, one clever thing to do when in check is to attempt all possible captures that might remove the check situation, before attempting other ways of eliminating check.

It makes sense to keep all your pieces protected, if one of your pieces disappear, you can recapture.

Game strategy

Slightly rephrased text originally posted by epictetus cincinnatus as comment to this page.

It is very important to understand that the mindset for playing chess well is completely different from the mindset for playing kriegspiel well. Chess played well is predominantly about offense. Kriegspiel played well is predominantly about defense. Chess involves reasoning from complete knowledge. Kriegspiel involves reasoning from incomplete knowledge. In fact, a very useful trait for kriegspiel is paranoia.

All rules below should be treated as a rules of thumb. They have a point, but there are always exceptions dictated by extenuating circumstances.

The value of the pieces is a bit different than in standard chess. I would rate the relative strength of the pieces as follows: queen 7; rook 4; bishop 3; knight 2; pawn 2 (because pawn promotion is very common); and king 3. Vulnerability to attack means the spread in strength of pieces is less.

For as long as possible make sure as many of your pieces as possible are supported by as many of your pieces as possible. In other words, always think in terms of defensive structure when making moves, especially early in the game. Defend everything possible because you don't know where an attack will come from.

Hide you stronger pieces in out of the way places or behind weaker pieces.

Always check for possible pawn captures.

During a series of exchanges always capture with the weakest piece available first and stronger pieces later.

Be cautious in attacks. When deciding to attack a square threaten the square with as many pieces as possible and generally push the attack as long as possible. Attack with your weaker pieces first and your stronger pieces later.

Do not put the opposing king in check gratuitously. That can provide information about your position, but when you do put the king in check that can be a very important piece of information to have.

Be aggressive (but not too aggressive) with your king. Discovering where it can't move can provide a wealth of information as to your opponent's position.

Study your opponent's games before you play them. Noticing early opening tendencies can often give you a leg up in constructing your defense or even allow for an early ambush.

Conversely, try to avoid particular tendencies in your own early game.

Be patient. It's rare that you have to rush into anything and you're more likely than not to simply stumble into trouble.

Example Endgame Study

Contrary to common perceptions, it is not that very difficult to create checkmate late in the endgame with only a king and queen against a bare king.

Divide & Conquer. The first task is to setup the queen in the center. The board will then be divided into four quadrants or corrals (the insurmountable fence represented by shades.)

4?3/4?3/4?3/4?3/????Q???/3K?3/4?3/4?3

Now we know the opponent's king is trapped in one of the four quadrants. But where exactly?

Search & Destroy. The second task is to find the opponent's king. The white king has to move and roam from quadrant to quadrant until it meets resistance. When the king can't move into a target square we know the other king is nearby.

Going back to the above diagram, (assuming the lower left quadrant [a1-d3] has already been thoroughly searched and cleared,) now let's say white tried to move 1.Ke2 but was unable to. Resistance, that means the other king is in one of two (2) possible squares (shaded for demonstration.)

 

8/8/8/8/4Q3/3K4/5?2/5?2

Apply the Squeeze. Now tactics comes into play 1.Qe3 [further reducing the quadrant area] ? 2.Ke4 ? 3.Kf4 ? 4.Kg4 ?

 

8/8/8/8/6K1/4Q3/6??/5?1?

Now the other king could be in one of the four (4) different squares (again shaded for demo only).

5.Qd2 [again squeeze!] [not 5.Kg3 right away because there's a real good possibility of stalemate] ?

 

8/8/8/8/6K1/8/3Q4/5???

6.Kg3 ? 7.Qd1# 

Of course there are other ways to skin a cat.

Example games

Note, that while playing, players did not see opponent pieces.

K+R+B vs. King. - Here's a nice endgame tactics . Once surfnsuds has pinpointed black's whereabouts, there's no escape from his accurate and scheming mind. This game also shows how important it is for the king to support the other pieces in the endgame.

A short longshot. - A lucky miniature. Must see.

Against all odds. (I am still smarting over this one! - suds)

Please, add some


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