9-Piece handicap

The 9-Piece (九枚落ち kyūmai-ochi) handicap in shogi has all of White's pieces removed except for the king, their right gold, and their line of pawns. (Thus, their rook, bishop, silvers, knights, lances, and the left gold are all missing.)

9-Piece
☖ pieces in hand: –
987654321 
   金王    1
         2
歩歩歩歩歩歩歩歩歩3
         4
         5
         6
歩歩歩歩歩歩歩歩歩7
 角     飛 8
香桂銀金玉金銀桂香9
☗ pieces in hand: –

This handicap is very severe and, thus, not very competitive. It is not deemed an official handicap of the Japan Shogi Association. Its purpose is primarily for teaching shogi novices how to play.

Opening

1...K-42, 2. P-76. The same first moves as the lower handicap. (See: 10-Piece handicap.)

2...G-72. White moves their gold upward and leftward in order to protect the seventh file pawn (on 73) and as well as preparing to move again to further protect the ninth file pawn from an early breech by Black's bishop.

If White were to make the same 2...P-54 move as in the 10-Piece handicap opening, then Black would be able to promote their bishop on the 93 square.

9-Piece
☖ pieces in hand: –
987654321 
         1
 金  王   2
歩歩歩歩歩歩歩歩歩3
         4
         5
  歩角     6
歩歩歩歩歩歩歩歩7
      飛 8
香桂銀金玉金銀桂香9
☗ pieces in hand: –
3. B-66 G-82

☗4. P-56

This is the line suggested by Kageyama & Kimura (1955).

9-Piece
☖ pieces in hand: –
987654321 
         1
 金    王 2
歩歩歩歩歩歩歩歩歩3
         4
      角  5
  歩 歩   6
歩歩 歩歩歩歩歩7
       飛 8
香桂銀金玉金銀桂香9
☗ pieces in hand: –
5...K-22
6. B-35

☗4. P-26

This is the line suggested by Ishibashi (2012).

9-Piece Right Gold
9-Piece Right Gold
☖ pieces in hand: –
987654321 
    王金   1
         2
歩歩歩歩歩歩歩歩歩3
         4
         5
         6
歩歩歩歩歩歩歩歩歩7
 角     飛 8
香桂銀金玉金銀桂香9
☗ pieces in hand: –

Ishibashi (2012) also discusses a different 9-Piece Handicap variant that removes White right gold (右金落ち) instead of the left gold (左金落ち) shown above.

gollark: Never mind, my numbers were wrong, a maximum of 14W or so.
gollark: 100cm² = a 10cm by 10cm square.
gollark: A 100cm² drone will receive an *absolute maximum* of 20W of solar power.
gollark: So you need more weight and thus more motors.
gollark: So your drone is down half the time?

See also

Notes

    References
    • 石橋, 幸緒 [Sachio Ishibashi] (2012). "次は、「九枚落ち」進みましょう". 石橋幸緒の駒落ちレシピ. 長崎出版.CS1 maint: ref=harv (link)
    • 影山, 稔雄 [Toshio Kageyama]; 木村, 義雄 [Yoshio Kimura] (1955). 将棋駒落の指し方. 大泉書店. pp. 24–25.CS1 maint: ref=harv (link)
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