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Falcon, Falcons, Hunter Falcon Falcon, Falcon-Bison -- also in the patent. Jeremy Good had a two-pathway Falcon, omitting split block and split diagonal. Problemists' Bison, used all of once, never appeared in CV until 1992 with Falcon-Bison. I lost track too, John, of yours. They are all welcome. Just for any formal Preset or CV, paired Bison(full-stength) is USP5690334. John et al., please feel free to test and compare. Combination pieces or truncated or whatever. As Joe Joyce has intelligently said, Falcon is neither obvious nor intuitive. That is, unless you properly learned it at age 6 with Chess instruction. There are teenagers in 1990s, now in professions, who take three-path Falcon for granted. An underground army of supporters. // Values? Originally, Falcon 5.5 Rook 5.0, midgame 5.0-5.0, endgame 4.5-5.0. Obviously Falcon steadily but measurably decreases in value. Everything is counterintuitive in the real world. Chess for Dummies.