Announcement: The Bozochess Project

[sje]

Some advances:

1) Bozo now has all of its I/O traffic gated through a only a few routines instead of having write/writeln calls scattered throughout the code. There are several reasons for this including the possibility of adding a thread-safe log file generator and performing internal I/O redirection or cloning. The retreat is that the fancy "rgstat" output format is gone; a simple version is back in place.

2) Bozo can now correctly do FEN I/O to a user specified file. Alas, while there is full data checking, there is no file I/O checking. This will be added later. One problem with file I/O is that every Pascal system treats it differently and I have to pick the calls limited to the intersection of different functionality.

3) Bozo can now correctly do PGN output to a user specified file, but as is the case with FEN, there are no file I/O error checks yet. Bozo does not yet handle PGN input from a file; this will have to wait until after the initial release.

4) Console command input has only a single readln() call. This is done in part to simplify the addition of recursive (and parametrized) batch command file invocation, a very helpful feature. But completion of such will not appear in the initial release.

5) The ICP "help" command output is now entirely table driven as it should have been in the first place.

6) The word "Insufficient" is now spelled correctly.

Five more days until the source release.

Here's the latest ICP command set:

Code: Select all

BozoChess 2011.10.26   Copyright (C) 2011 by S. J. Edwards
BozoChess ready

[] help
Enter a command, or a sequence of one or more SAN chess moves 
  Commands:
    db         Display board (ANSI color)
    dbbdb      Display bitboard database
    dbmono     Display board (monochrome)
    dfen       Display FEN
    dm         Display moves
    dp         Display position
    dpgn       Display PGN
    exit       Exit program
    help       Show help
    loadfen    Load FEN from a <file>
    loadpgn    Load PGN from a <file>
    new        New game
    noop       No operation
    perftbulk  Run perft to <depth> with bulk counting
    perftfull  Run perft to <depth> with each node visited
    perfttran  Run perft to <depth> with transposition help
    rg         Generate and display a single random game
    rgstat     Generate a report for <number> random game&#40;s&#41;
    rm         Retract move
    savefen    Save FEN to a <file>
    savepgn    Save PGN to a <file>
    sfen       Set FEN <MPD> <good> <cavs> <epsq> <hmvc> <fmvn>
    test       Run developer test
&#91;&#93; exit

BozoChess done

The newly simplified rgstat output:

Code: Select all

[] rgstat 100000
Checkmate 15610
FiftyMoves 19105
Insufficient 56711
Repetition 2521
Stalemate 6053
Unterminated 0
Total 100000
[] exit

[sje]

Some minor additions:

1) The overall formatted operations have been further streamlined to more easily adapt to one-line-at-a-time regime for log file and dribble file generation.

2) More PGN tags are supported including the "Date" tag that needs some external Pascal unit help for accessing date and time information. There is a concern here that what I might use some system feature that works fine under Free Pascal but won't work under a different compiler or platform. And that's one reason I need testers.

3) The "rg" random game generator now uses the upgraded PGN encoder. This includes support for the tags "EndFEN", "Termination", and PlyCount". More to come on this.

4) I've swapped in my own pseudo random number generator. The program uses one instance to produce the Zobrist hash codes and another instance for everything else. The hash code generator instance gives the same codes each time and for each platform as is a requirement for an external, independent, hash-indexed opening book library. The other instance gives a different sequence on each program invocation.

Four more days until the source release.

Sample "rg" transcript:

Code: Select all

[] rg
[Event "Random Game"]
[Site "Unknown site"]
[Date "2011.10.27"]
[Round "-"]
[White "Random player"]
[Black "Random player"]
[Result "0-1"]
[EndFEN "6rK/p4q2/P7/2k5/3p3p/2r5/8/8 w - - 6 119"]
[Termination "Checkmate"]
[PlyCount "236"]

1 b4 h5 2 d4 Nc6 3 Nd2 f6 4 e3 Nb8 5 Ndf3 b6 6 g4 Ba6 7 Kd2 Rh6 8 Rb1 Bc8 9 c3 Na6 10 Bb5 Nc5 11
Qc2 Nd3 12 Bb2 Bb7 13 Ne2 Bc6 14 h4 Bxb5 15 e4 Qb8 16 d5 Bc4 17 Ba1 Nxf2 18 Qb3 c6 19 Kc1 Bd3 20
Ned4 e5 21 Nh2 c5 22 Nf5 Bxb1 23 d6 Nxg4 24 a3 cxb4 25 Ne3 bxc3 26 Nhxg4 Qc7 27 a4 g6 28 Nc4 Qd8 29
Qb4 Rh8 30 Rf1 Nh6 31 Kd1 Nxg4 32 Re1 Nh2 33 Nd2 Ba2 34 Nc4 b5 35 Qa3 Bb1 36 Re2 Qb6 37 Qb2 Nf1 38
a5 cxb2 39 Rh2 Qxd6+ 40 Nxd6+ Kd8 41 Re2 Nd2 42 Rh2 Rb8 43 Rf2 bxa1=Q 44 Nc4 Bh6 45 Rg2 Kc8 46 Nxe5
Rd8 47 Rxg6 Bc2+ 48 Kxc2 Ra8 49 Nf7 d5 50 Rxh6 Kb8 51 Kd3 Nxe4 52 Ng5 f5 53 Nf3 b4 54 Rc6 Qc1 55
Rxc1 Rh8 56 a6 Nd6 57 Rc8+ Rxc8 58 Nh2 Nb5 59 Ng4 fxg4 60 Ke2 Rf8 61 Kd3 Re8 62 Kc2 Rd8 63 Kc1 Nd4
64 Kb2 b3 65 Kc1 Ne6 66 Kd1 Ng5 67 Kd2 Ne6 68 Ke1 Rd6 69 Kd1 Ng7 70 Kd2 Rg6 71 Kd3 Rc6 72 Ke2 g3 73
Ke1 Ne6 74 Ke2 Rc4 75 Kf1 Rc8 76 Ke1 Rc4 77 Kf1 Nd4 78 Ke1 Ne2 79 Kd1 Rc1+ 80 Kxe2 Rc6 81 Kd1 Rc3
82 Ke2 b2 83 Kd2 Kc7 84 Ke2 Rc6 85 Kf3 Rh8 86 Kf4 Rc4+ 87 Kg5 Rf4 88 Kg6 Kc6 89 Kg7 Kb6 90 Kxh8 Kc5
91 Kh7 Rd4 92 Kg7 Rg4+ 93 Kf7 g2 94 Ke8 Rc4 95 Ke7 Rb4 96 Kd7 Kc4 97 Kc7 Rb3 98 Kd8 Rf3 99 Kd7 b1=Q
100 Kd6 g1=R 101 Ke6 Rf4 102 Ke5 Rxh4 103 Kd6 Qb2 104 Kd7 Qc2 105 Ke7 Rg3 106 Kf8 Kd4 107 Kf7 Kc5
108 Ke7 Qe4+ 109 Kf7 Rc3 110 Kf8 d4 111 Kg7 Qf5 112 Kh6 Qe6+ 113 Kh7 Qc4 114 Kh6 Rg4 115 Kh7 h4 116
Kh6 Rg6+ 117 Kh7 Qf7+ 118 Kh8 Rg8# 0-1

[] rg
[Event "Random Game"]
[Site "Unknown site"]
[Date "2011.10.27"]
[Round "-"]
[White "Random player"]
[Black "Random player"]
[Result "1/2-1/2"]
[EndFEN "8/b7/6k1/8/8/n7/3r4/K2b4 w - - 22 106"]
[Termination "Stalemate"]
[PlyCount "210"]

1 d3 f5 2 c3 b5 3 f4 Na6 4 Na3 e5 5 Qd2 Bb7 6 Nc2 h6 7 g4 d6 8 h4 fxg4 9 Nb4 Kd7 10 e3 c6 11 Qe2
Ke6 12 e4 g5 13 Rh3 Nf6 14 fxg5 Nxb4 15 Rh1 a5 16 gxh6 Nxa2 17 Rb1 Rxh6 18 Bf4 Kd7 19 b4 Qb6 20 Bh3
Rh8 21 Bh2 Qf2+ 22 Qxf2 Rc8 23 Qg3 Ne8 24 Rb2 Ng7 25 Qg2 axb4 26 Ke2 Ra8 27 Bf4 b3 28 Qf3 Nh5 29
Rxb3 Nxf4+ 30 Ke3 Re8 31 Qg3 Bc8 32 Rxb5 Bh6 33 Rb8 Bg7 34 Ne2 Nxc3 35 Qf3 Rh7 36 Nxf4 Rh5 37 Ra8
Ke7 38 Re1 Nd5+ 39 Kd2 Nb4 40 Kd1 Kf7 41 Qg3 Ba6 42 Qh2 Na2 43 Qd2 Bf8 44 Rf1 Bg7 45 Qe1 Nc1 46 Rc8
exf4 47 Qc3 Rxe4 48 Re1 Ke7 49 Rf1 Bf8 50 Rd8 Rd4 51 Rc8 Kf6 52 Rb8 d5 53 Re8 Bd6 54 Ke1 f3 55
Rxf3+ gxf3 56 Be6 Nb3 57 Qa5 Bb8 58 Rh8 Rdxh4 59 Bf5 Rxh8 60 Qd8+ Rxd8 61 Be6 Rg4 62 Kd1 Rh8 63 d4
Be5 64 Bxg4 Bb8 65 Ke1 Rh3 66 Kf2 Rh5 67 Bxf3 Bb7 68 Ke3 Rh6 69 Bxd5 Kf5 70 Kd3 Nc5+ 71 Kd2 Bc7 72
Kd1 Kg4 73 Bb3 Rh1+ 74 Kc2 Na6 75 Bc4 Bg3 76 Bd5 Bf2 77 Bf3+ Kh3 78 Bxc6 Kg4 79 Bf3+ Kf5 80 Bg4+
Kg6 81 Kc3 Be3 82 Be6 Nc7 83 Kb3 Ra1 84 Kc2 Bxd4 85 Bf7+ Kg5 86 Bd5 Bc8 87 Ba2 Rg1 88 Bf7 Bb6 89
Bh5 Ne8 90 Kc3 Rd1 91 Bg4 Rd8 92 Bh5 Be6 93 Kc2 Bg4 94 Kc1 Kxh5 95 Kc2 Ba7 96 Kb2 Rd4 97 Ka2 Bf3 98
Kb1 Rh4 99 Ka2 Nc7 100 Kb1 Rh2 101 Kc1 Bd1 102 Kb1 Kg6 103 Ka1 Nb5 104 Kb1 Rd2 105 Ka1 Na3 1/2-1/2

[] rg
[Event "Random Game"]
[Site "Unknown site"]
[Date "2011.10.27"]
[Round "-"]
[White "Random player"]
[Black "Random player"]
[Result "1/2-1/2"]
[EndFEN "8/1B6/8/8/r7/1K6/8/4k3 w - - 37 208"]
[Termination "Repetition"]
[PlyCount "414"]

1 b3 e6 2 Nc3 d5 3 Rb1 Ke7 4 Bb2 Kd6 5 Nxd5 f5 6 g3 Kc6 7 a4 Kd6 8 Nxc7 Qf6 9 h3 Kd7 10 e4 b5 11 f4
Qd4 12 exf5 Qd3 13 axb5 Kd6 14 Ba3+ Kxc7 15 c3 Qc4 16 fxe6 Bb4 17 b6+ axb6 18 Bxc4 g6 19 Bf1 Na6 20
Rc1 Bxc3 21 Bb4 Ne7 22 Bxe7 Rd8 23 Bd3 Rxd3 24 Bh4 Bb7 25 Ke2 Kc8 26 Qc2 Re3+ 27 dxe3 Bg2 28 Qf5
Rb8 29 Qf7 Bf1+ 30 Rxf1 g5 31 Rh2 g4 32 Rg2 Bd4 33 Rgf2 Ra8 34 Qg7 gxh3 35 Rc1+ Bc5 36 Kd2 Kb8 37
Be7 h2 38 Bf8 Bd4 39 Kd3 h1=B 40 Qg6 Nb4+ 41 Kxd4 Na6 42 Rb2 h5 43 Ra2 Ka7 44 Rh2 Rc8 45 Re1 h4 46
Ra1 Ra8 47 Rxh1 Kb8 48 Ne2 Ka7 49 Kc3 Rb8 50 Qf5 Kb7 51 Qb1 Nc7 52 Ra8 Na6 53 Qd3 h3 54 Rc1 h2 55
Qd2 Rxa8 56 Bc5 Nb4 57 Bxb4 h1=R 58 Rc2 Rc1 59 Kc4 Kc8 60 Qd7+ Kb8 61 Qb5 Re1 62 Rc1 Kc7 63 Qg5 Kc6
64 Bc3 Ra6 65 b4 Kc7 66 Bf6 Kb8 67 Qh6 Kc7 68 f5 Rh1 69 b5 Kc8 70 Kb3+ Rxc1 71 Nd4 Rc3+ 72 Kb2 Kb8
73 g4 Raa3 74 Nf3 Rc7 75 Qh8+ Kb7 76 Bg5 Rc2+ 77 Kb1 Rc5 78 Nh2 Ra2 79 Qf6 Ra4 80 Bh6 Rd5 81 Nf3
Rdd4 82 Bg7 Rab4+ 83 Ka2 Rd6 84 Nh4 Rd7 85 Ng2 Rdd4 86 Nh4 Rd6 87 Qc3 Rc4 88 Kb2 Kc8 89 Ng6 Rd7 90
Qa3 Rxg7 91 Qd6 Re7 92 g5 Re4 93 Kc1 Ra7 94 Nf8 Rd4 95 g6 Rf7 96 Qxd4 Rg7 97 Qd3 Rf7 98 Nd7 Kb7 99
Qb3 Rh7 100 Kc2 Rh4 101 Qa4 Kc7 102 Qa2 Kd8 103 Qb2 Rh2+ 104 Kb1 Kc7 105 Qh8 Rf2 106 Qc8+ Kxc8 107
Nb8 Rf4 108 Kb2 Kxb8 109 e4 Rh4 110 e7 Ka7 111 g7 Rg4 112 e8=B Kb7 113 Ka1 Rg1+ 114 Ka2 Rd1 115
g8=N Rd8 116 f6 Rd4 117 Kb3 Kc7 118 Bh5 Rc4 119 Bg4 Kd6 120 f7 Ra4 121 Bh3 Ke5 122 Bg2 Ra3+ 123 Kc2
Kf4 124 Bf3 Ra2+ 125 Kc3 Ra8 126 Be2 Kg5 127 Bc4 Kh5 128 Bd5 Kh4 129 Bc4 Rf8 130 Ba2 Rxg8 131 Be6
Re8 132 Kb2 Ra8 133 Kb1 Kh5 134 Bg4+ Kh6 135 f8=N Ra5 136 Be6 Kg5 137 Nh7+ Kh5 138 Ba2 Rxb5+ 139
Kc2 Kh4 140 e5 Rd5 141 Bc4 Rc5 142 Kd3 Kh5 143 Ba6 Rc3+ 144 Ke4 Rb3 145 Bf1 Re3+ 146 Kf4 Rg3 147
Bd3 Rg1 148 Ba6 Rg2 149 Be2+ Kh4 150 Ng5 b5 151 Ke3 Rg3+ 152 Kf4 Rg2 153 Nh7 Rg6 154 Ng5 Rxg5 155
Bf1 Rg1 156 Kf3 Rg3+ 157 Kf2 Rg5 158 Bc4 Kh3 159 Kf3 Rg2 160 Be2 Kh2 161 Kf4 Rf2+ 162 Ke4 Kh3 163
Bxb5 Kg3 164 Be8 Rf6 165 Kd4 Kf3 166 Bd7 Re6 167 Bb5 Kg4 168 Be2+ Kg3 169 Bf1 Kh4 170 Kc3 Rd6 171
Be2 Kg3 172 Bd1 Kg2 173 Kb4 Ra6 174 Ba4 Ra5 175 Kc4 Kh2 176 Bd7 Rc5+ 177 Kb4 Kg1 178 Ka3 Rc6 179
Bf5 Rc5 180 Bb1 Kg2 181 Be4+ Kh3 182 Kb4 Rc3 183 Bb7 Rc4+ 184 Kb3 Rd4 185 Bg2+ Kxg2 186 Ka3 Rf4 187
e6 Kh1 188 e7 Rg4 189 e8=B Rh4 190 Bf7 Kh2 191 Bb3 Kg3 192 Bc2 Rh5 193 Bd1 Kg2 194 Ka2 Rh4 195 Ba4
Kf3 196 Ka1 Kg2 197 Bb5 Rg4 198 Bc4 Rh4 199 Bd5+ Kf2 200 Bh1 Re4 201 Ka2 Ke1 202 Kb3 Rf4 203 Bb7
Ra4 204 Bh1 Rh4 205 Bb7 Ra4 206 Bh1 Ra1 207 Bb7 Ra4 1/2-1/2

[sje]

Three more days until the BozoChess source release.

As mentioned in other threads, there has been work done on the random game generation and the self test facility. I'm now putting the final touches on the PGN subsystem which will be complete except for decoding PGN files.

Alas, there is a big-ass snowstorm heading my way and I expect to lose power by late Saturday, so the release might be delayed. If this happens, I'll do the release soon after the electricity is restored.

[sje]

Two more days (at least) until the release. I say "at least" as the houses on the west end of my street have all gone dark because of storm-related power failure and I expect to lose power here soon.

Bozo's PGN code now understands games that started from other than the initial array and so can continue and encode these correctly.

The program is gaining a better understanding of time at the expense of potentially greater compiler/platform dependencies. The basic time unit is the nanosecond and is expressed internally as a 64 bit signed integer. The CompTime record type presents an unsigned nanosecond count in terms of days, hours, minutes, seconds, and nanoseconds stored modular-wise (DDD:HH:MM:SS.nnnnnnnnn); this is encoded only to the millisecond level for sake of brevity.

When playing or retracting a move, Bozo now prints the string "Playing" or "Unplaying" followed by the numbered move with an ellipsis added as a number suffix for a move by Black.

In-source compiler options appear prior to the program declaration in Pascal style. Only three of these are explicitly present for now, more might be added later. Such options are generally compiler dependent:

Code: Select all

{$C+ Assertions }
{$H- Ansistrings }
{$R+ Range checking }

[sje]

Sorry for missing the release date: I lost power during the storm and just got back online. I'll report more when I get the machines fixed up from their current scrambled state.

I hope to have things fixed up soon for a new release date of Monday November 7th.

[sje]

Thanks to all who have contributed FEN perft records for self testing. I have sixteen so far, and room for more.

Here's the current list:

Code: Select all

      SetStpr( 0, 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1',             20,  400,  8902);
      SetStpr( 1, '2qrr1n1/3b1kp1/2pBpn1p/1p2PP2/p2P4/1BP5/P3Q1PP/4RRK1 w - - 0 1',       44,  833, 35770);
      SetStpr( 2, 'r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1', 48, 2039, 97862);
      SetStpr( 3, '8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8 w - - 0 1',                            14,  191,  2812);
      SetStpr( 4, 'r3k2r/Pppp1ppp/1b3nbN/nP6/BBP1P3/q4N2/Pp1P2PP/R2Q1RK1 w kq - 0 1',      6,  264,  9467);
      SetStpr( 5, 'r2q1rk1/pP1p2pp/Q4n2/bbp1p3/Np6/1B3NBn/pPPP1PPP/R3K2R b KQ - 0 1',      6,  264,  9467);
      SetStpr( 6, 'rnbqkb1r/ppppp1pp/7n/4Pp2/8/8/PPPP1PPP/RNBQKBNR w KQkq f6 0 1',        31,  570, 17546);
      SetStpr( 7, '8/3k4/8/4b3/1p1p1p2/8/1PPRP2K/8 w - - 0 1',                            12,  197,  2696);
      SetStpr( 8, '8/4rP2/8/8/4pk2/8/3P2PP/4K2R w K - 0 1',                               17,  182,  3232);
      SetStpr( 9, 'rnb1kbnr/pp1ppppp/8/8/q1p4K/5P2/PPPPP1PP/RNBQ1BNR w kq - 2 5',         21,  607, 12644);
      SetStpr(10, 'rnbq1bnr/pppp1ppp/3kp3/3P4/1B6/8/PPP1PPPP/RN1QKBNR b KQ - 2 4',         2,   63,  1721);
      SetStpr(11, 'n1n5/PPPk4/8/8/8/8/4Kppp/5N1N b - - 0 1',                              24,  496,  9483);
      SetStpr(12, '8/p7/8/1P6/K1k3p1/6P1/7P/8 w - - 0 1',                                  5,   39,   237);
      SetStpr(13, 'r3k2r/p6p/8/B7/1pp1p3/3b4/P6P/R3K2R w KQkq - 0 1',                     17,  341,  6666);
      SetStpr(14, '8/5p2/8/2k3P1/p3K3/8/1P6/8 b - - 0 1',                                  9,   85,   795);
      SetStpr(15, 'r3k2r/pb3p2/5npp/n2p4/1p1PPB2/6P1/P2N1PBP/R3K2R b KQkq - 0 1',         29,  953, 27990)

[mike_bike_kite]

Have you considered just writing a simple blog rather than posting on a discussion forum?

[Ajedrecista]

Hello Steven:

Thanks to all who have contributed FEN perft records for self testing. I have sixteen so far, and room for more.

Here's the current list:

Code: Select all

      SetStpr( 0, 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1',             20,  400,  8902);
      SetStpr( 1, '2qrr1n1/3b1kp1/2pBpn1p/1p2PP2/p2P4/1BP5/P3Q1PP/4RRK1 w - - 0 1',       44,  833, 35770);
      SetStpr( 2, 'r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1', 48, 2039, 97862);
      SetStpr( 3, '8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8 w - - 0 1',                            14,  191,  2812);
      SetStpr( 4, 'r3k2r/Pppp1ppp/1b3nbN/nP6/BBP1P3/q4N2/Pp1P2PP/R2Q1RK1 w kq - 0 1',      6,  264,  9467);
      SetStpr( 5, 'r2q1rk1/pP1p2pp/Q4n2/bbp1p3/Np6/1B3NBn/pPPP1PPP/R3K2R b KQ - 0 1',      6,  264,  9467);
      SetStpr( 6, 'rnbqkb1r/ppppp1pp/7n/4Pp2/8/8/PPPP1PPP/RNBQKBNR w KQkq f6 0 1',        31,  570, 17546);
      SetStpr( 7, '8/3k4/8/4b3/1p1p1p2/8/1PPRP2K/8 w - - 0 1',                            12,  197,  2696);
      SetStpr( 8, '8/4rP2/8/8/4pk2/8/3P2PP/4K2R w K - 0 1',                               17,  182,  3232);
      SetStpr( 9, 'rnb1kbnr/pp1ppppp/8/8/q1p4K/5P2/PPPPP1PP/RNBQ1BNR w kq - 2 5',         21,  607, 12644);
      SetStpr(10, 'rnbq1bnr/pppp1ppp/3kp3/3P4/1B6/8/PPP1PPPP/RN1QKBNR b KQ - 2 4',         2,   63,  1721);
      SetStpr(11, 'n1n5/PPPk4/8/8/8/8/4Kppp/5N1N b - - 0 1',                              24,  496,  9483);
      SetStpr(12, '8/p7/8/1P6/K1k3p1/6P1/7P/8 w - - 0 1',                                  5,   39,   237);
      SetStpr(13, 'r3k2r/p6p/8/B7/1pp1p3/3b4/P6P/R3K2R w KQkq - 0 1',                     17,  341,  6666);
      SetStpr(14, '8/5p2/8/2k3P1/p3K3/8/1P6/8 b - - 0 1',                                  9,   85,   795);
      SetStpr(15, 'r3k2r/pb3p2/5npp/n2p4/1p1PPB2/6P1/P2N1PBP/R3K2R b KQkq - 0 1',         29,  953, 27990)

I have checked all these FEN strings with JetChess and I did not found any error or typo, so good job! But I do not reply for this... I found an issue:

https://sites.google.com/site/numptyche ... position-5

In this position I recommended you (the last one of your code box, number 15), there is something wrong: the image of the position matches with the FEN string posted below... but the perft values given on Numpty web are wrong: they correspond with the same position, but replacing the black pawn on g6 to a black pawn on g7. I mean:

Code: Select all

r3k2r/pb3p2/5npp/n2p4/1p1PPB2/6P1/P2N1PBP/R3K2R b KQkq -
Perft(1) = 29; Perft(2) = 953; Perft(3) = 27,990.

r3k2r/pb3pp1/5n1p/n2p4/1p1PPB2/6P1/P2N1PBP/R3K2R b KQkq -
Perft(1) = 30; Perft(2) = 986; Perft(3) = 29,777.

I say this just in case someone wants to check your results with the ones posted on Numpty web and thinks that something is wrong with your perft counter implemented in BozoChess. Tip: please check the second FEN I give in the code box, just in case... but I think that, if you managed to count all the positions flawlessly, this should not be an exception.

I am sorry for the storms there... as we say in Spain: después de la tempestad viene la calma (after the storm comes the calm). Good luck!

Regards from Spain.

Ajedrecista.

[sje]

Thank you for the update on position 15:

Code: Select all

SetStpr(15, 'r3k2r/pb3pp1/5n1p/n2p4/1p1PPB2/6P1/P2N1PBP/R3K2R b KQkq - 0 1',        30,  986, 29777)

[sje]

Here's the current command set:

Code: Select all

[] help
Enter a command, or a sequence of one or more SAN chess moves 
  Commands:
    bench      Run the benchmark
    d          Display everything
    db         Display board (ANSI color)
    dbbdb      Display bitboard database
    dbmono     Display board (monochrome)
    dfen       Display FEN
    dm         Display moves
    dp         Display position
    dpgn       Display PGN
    echo       Echo parameters
    exit       Exit program
    go         Search for a move and then play it
    gogame     Play both sides until the end of the game
    help       Show help
    loadfen    Load FEN from a <file>
    loadpgn    Load PGN from a <file>
    mate       Search for a checkmate in <n> full moves
    new        New game
    noop       No operation
    perftbulk  Run perft to <depth> with bulk counting
    perftfull  Run perft to <depth> with each node visited
    perfttran  Run perft to <depth> with transposition help
    rg         Generate and display a single random game
    rgdump     Generate <number> random game&#40;s&#41; and dump to a <file>
    rgstat     Generate a report for <number> random game&#40;s&#41;
    rm         Retract move
    savefen    Save FEN to a <file>
    savepgn    Save PGN to a <file>
    selftest   Run the self test
    sfen       Set FEN <MPD> <good> <cavs> <epsq> <hmvc> <fmvn>
    stag       Set PGN <tagname> to <tagvalue>
    test       Run developer test

Not yet implemented: bench, go, gogame, loadpgn, mate, and stag.

The "mate" command does correctly report if there is a mate in N, but not very efficiently nor does it give the PV.

Code: Select all

[] sfen 1B1bk3/7R/1r5p/1Pp1p3/2NP1N2/1RP2Pp1/2QK4/8 w - - 2 52
[] mate 1
Node count: 5
Predicted score: Even
[] mate 2
Node count: 369
Predicted score: Even
[] mate 3
Node count: 34224
Predicted score: Even
[] mate 4
Node count: 645271
Predicted score: MateIn4

In other news:

1) The high speed checking move marker is in place. This makes the check and checkmate notation routines much, much faster.

2) The PosGenOnlyChecks routine is halfway there; it calls the PosGenerate routine and the the fast check marker to output only checking moves. Later, it will generate checking moves directly.

3) Joerg Oster has reported successful operation of the pre-release October 28th version under Windows 7 64 bit. This is very useful information as I have no access to a Windows machine.

4) I've changed the base time resolution from one nanosecond to one microsecond due to library and portability concerns. If everyone had a Mac OS/X or Linux box, using nanoseconds would not be a problem. But I want to make the source as portable as I can and this means all or nearly all of the Free Pascal target platforms:

Processors (Intel x86, Amd64/x86_64, PowerPC, PowerPC64, Sparc, and ARM)

Operating systems (Linux, FreeBSD, Haiku, Mac OS X/Darwin, DOS, Win32, Win64, WinCE, OS/2, Netware (libc and classic) and MorphOS)

Also, the Java Virtual Machine.