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Check out Janggi (Korean Chess), our featured variant for December, 2024.
Check out Janggi (Korean Chess), our featured variant for December, 2024.
'My question is rather specific, in the duodecimal variant I am just designing there are standard knights and bishops, and I want the endgame of king & knight & bishop vs lone king to be a win.' - Jörg Knappen, regarding the 50 moves rule.
Sorry to be so late! Your 12x12 board requires at least a 100 moves rule, as the length of a forced checkmate (or other victory) seems to increase in proportion to the number of squares on the board. Here are some known facts on the 8x8 board. K+B+B can take 19 moves to mate. K+B+N can take 33 moves to mate. K+Q versus K+B+B can take as long as 71 moves to force the first capture. K+R+R versus K+Q only takes 15 moves (30 ply) to force the capture of the Queen, but it takes much longer if the defender has a [C]hancellor (Rook + Knight) or a [U]nicorn (Bishop + Nightrider).
* Fairy endgames with 3 pieces' * Dave McCooey * ------------------------------------------------------------------ ||||| Longest Wins for the Strong Side (WHITE) ||||| ------------------------------------------------------------------ Three Number Type Side Piece Half Of Of To Endgame MovesPositions Win Example Position Move ------- ----- ------- ------- ---------------------------------- ----- KRRvKQ 30 14 f-captr WK(c8) WR(h2) WR(g8) BK(a1) BQ(d1) WHITE KRRvKU 202 4 capture WK(b8) WR(d5) WR(h8) BK(d7) BU(e1) BLACK KRRvKC 87 9 capture WK(d6) WR(a6) WR(a7) BK(g6) BC(d3) WHITE KQvKBB(xdd) 142 74 capture WK(b8) WQ(a8) BK(e5) BB(e6) BB(f8) BLACK