chess:programming:fen_forsyth-edwards_notation:test_huge_number_of_moves
Table of Contents
Chess - Programming - FEN (Forsyth-Edwards Notation) - Test Huge Number of Moves
4r1k1/p4pp1/2n2n1B/2b5/N6Q/P2q1N2/1r4PP/R4R1K b - - 1 23 Has the distinction of most possible moves in a rated game between humans, 79 to be exact. positions(1) = 79 positions(2) = 3,319 positions(3) = 124,423 positions(4) = 2,859,642 positions(5) = 64,788,485 positions(6) = 1,029,681,307 go perft 7 a7a6: 25724485992 g7g6: 23360523846 a7a5: 24481458485 g7g5: 17671726160 g7h6: 14967259327 c6b4: 19844766321 c6d4: 18977857396 c6a5: 22363421438 c6e5: 20872320729 c6e7: 17798055165 c6b8: 19979471497 c6d8: 18612629844 f6e4: 20244239317 f6g4: 21079678036 f6d5: 29063835865 f6h5: 26438800449 f6d7: 27481210259 f6h7: 25604198905 c5g1: 24106298732 c5f2: 21329562819 c5a3: 24344154975 c5e3: 20089750437 c5b4: 22846539842 c5d4: 17865945604 c5b6: 22175123060 c5d6: 26913491992 c5e7: 18819535739 c5f8: 22059394770 b2b1: 18537064427 b2a2: 22054289160 b2c2: 21816641345 b2d2: 19775341144 b2e2: 22663202883 b2f2: 20105379478 b2g2: 22626039984 b2b3: 22576128310 b2b4: 24589795775 b2b5: 22019676813 b2b6: 21677667288 b2b7: 24132991495 b2b8: 22073605660 e8e1: 18728089318 e8e2: 21837960028 e8e3: 18818267119 e8e4: 20132952865 e8e5: 23753269631 e8e6: 22945531050 e8e7: 22180130672 e8a8: 20775044016 e8b8: 23474561273 e8c8: 21851127868 e8d8: 23309116861 e8f8: 19482358190 d3b1: 13516567004 d3d1: 16395719009 d3f1: 489045616 d3c2: 18249352216 d3d2: 18833926965 d3e2: 18358059878 d3a3: 17734097294 d3b3: 18954878557 d3c3: 20032367508 d3e3: 17463829328 d3f3: 14653152225 d3c4: 21253983339 d3d4: 17342646043 d3e4: 17907682413 d3b5: 16946491674 d3d5: 21203458584 d3f5: 22270466206 d3a6: 15769503995 d3d6: 19204368642 d3g6: 17064626235 d3d7: 20200728167 d3h7: 15056656391 d3d8: 17075280483 g8h7: 18534748945 g8f8: 20741141562 g8h8: 20456704030 Nodes searched: 1612761451963 Juts for kicks, I also ran the perft 7 after 22.Bxh6 1r2r1k1/p4pp1/2n2n1B/2b5/7Q/P1Nq1N2/1P4PP/R4R1K b - - 0 22 suspecting it would be greater, and it was ... 1.66 trillion go perft 1 = 70 position fen 1r2r1k1/p4pp1/2n2n1B/2b5/7Q/P1Nq1N2/1P4PP/R4R1K b - - 0 22 go perft 7 a7a6: 29127646412 g7g6: 25843771858 a7a5: 28560153615 g7g5: 20371509427 g7h6: 17796839729 c6b4: 22225907484 c6d4: 21503922721 c6a5: 25780591909 c6e5: 23950019170 c6e7: 19692644021 c6d8: 21809655798 f6e4: 21662635884 f6g4: 23629078999 f6d5: 32074329747 f6h5: 29334285715 f6d7: 29424429212 f6h7: 28288422365 c5g1: 26357161858 c5f2: 25060458792 c5a3: 27893168032 c5e3: 22358283133 c5b4: 22969220146 c5d4: 18998499455 c5b6: 22232560712 c5d6: 28724736966 c5e7: 19614334476 c5f8: 23730310922 b8b2: 33071223186 b8b3: 27411136242 b8b4: 30018939563 b8b5: 28675187678 b8b6: 28662715916 b8b7: 31835417803 b8a8: 23982947209 b8c8: 23421126026 b8d8: 24377273659 e8e1: 25286504575 e8e2: 31981235535 e8e3: 24371667451 e8e4: 25757649632 e8e5: 31188466861 e8e6: 29881431761 e8e7: 28662299235 e8c8: 21953652108 e8d8: 24778812799 e8f8: 21729020371 d3b1: 16883743828 d3d1: 19595564803 d3f1: 526479889 d3c2: 24680495238 d3d2: 24470947574 d3e2: 23412260519 d3c3: 16481431995 d3e3: 19229550593 d3f3: 16896013177 d3c4: 23058719039 d3d4: 19590088065 d3e4: 20318552725 d3b5: 18524234188 d3d5: 24317674437 d3f5: 26034392075 d3a6: 18440072846 d3d6: 21380767814 d3g6: 19728271076 d3d7: 23132526647 d3h7: 17183693388 d3d8: 18504510830 g8h7: 22056171576 g8f8: 23285667613 g8h8: 23887983561 Nodes searched: 1657681099664
Positions with 218 Moves each
R6R/3Q4/1Q4Q1/4Q3/2Q4Q/Q4Q2/pp1Q4/kBNN1KB1 w - - 0 1 3Q4/1Q4Q1/4Q3/2Q4R/Q4Q2/3Q4/1Q4Rp/1K1BBNNk w - - 0 1
References
chess/programming/fen_forsyth-edwards_notation/test_huge_number_of_moves.txt · Last modified: 2021/11/15 21:14 by peter