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This item is a piececlopedia entry
It belongs to categories: Orthodox chess, 
It was last modified on: 1999-05-30
 Author: Hans L. Bodlaender. Bison. Makes (1-3)-jump or (2-3)-jump.[All Comments] [Add Comment or Rating]
H. G. Muller wrote on 2008-07-09 UTC
'On 2008-07-06 H. G. Muller concluded that King and Bison can force checkmate on boards as large as 12x12. ' That was actually even 14x14. King + Bison vs Kings is absolutely won on 14x14 and smaller, with white to move. (i.e. not a single draw position.) The Bison cannot be trapped in a corner; its large stride simply makes it leap out of trouble. In addition there are no corner stalemates (such as in KNK: k N . . . . ), because a Bison can alway check the square . . . . . next to it in 1 move. K . . . . . . . . . The longest mates (against perfect defense) are: BOARD MOVES (K,Bi,k) 16x16: 76 (a4,b7,b1) (but 90% of all wtm positions are draw) 14x14: 82 (a1,n14,c3) (100% won) 12x12: 55 (a1,L12,c3) ' 10x10: 40 (a1,j10,c3) ' 8x8: 27 (a2,b2,b4) '