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Charon derives from many open-source chess engines, including Stockfish and Leela.
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Charon uses techniques from the Chess Programming Wiki and Hacker's Delight.
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Charon is vanilla bulk-counted perft. No hashing. Strictly legal move generation.
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This move generator is functional, but unfinished. The engine will always be a work in progress. Feedback and advice is always appreciated!
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~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~.
.~* Charon Perft *~.
*. by Ellie Moore .*
Starting Position:
H G F E D C B A
+---+---+---+---+---+---+---+---+
1 | R | N | B | K | Q | B | N | R | 1
+---+---+---+---+---+---+---+---+
2 | P | P | P | P | P | P | P | P | 2
+---+---+---+---+---+---+---+---+
3 | | | | | | | | | 3
+---+---+---+---+---+---+---+---+
4 | | | | | | | | | 4
+---+---+---+---+---+---+---+---+
5 | | | | | | | | | 5
+---+---+---+---+---+---+---+---+
6 | | | | | | | | | 6
+---+---+---+---+---+---+---+---+
7 | p | p | p | p | p | p | p | p | 7
+---+---+---+---+---+---+---+---+
8 | r | n | b | k | q | b | n | r | 8
+---+---+---+---+---+---+---+---+
H G F E D C B A
perft(1) - 0.000 seconds - 20 nodes visited.
perft(2) - 0.000 seconds - 400 nodes visited.
perft(3) - 0.000 seconds - 8902 nodes visited.
perft(4) - 0.000 seconds - 197281 nodes visited.
perft(5) - 0.016 seconds - 4865609 nodes visited.
perft(6) - 0.344 seconds - 119060324 nodes visited.
perft(7) - 9.047 seconds - 3195901860 nodes visited.
perft(8) - 249.016 seconds - 84998978956 nodes visited.
~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~._.~^*^~.
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- - r n b q k b n r - -
- - p p p p p p p p - -
- - . . . . . . . . - -
- - . . . . . . . . - -
- - . . . . . . . . - -
- - . . . . . . . . - -
- - P P P P P P P P - -
- - R N B Q K B N R - -
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- - - - - - - - - - - -
Quick Perft by H.G. Muller
Perft mode: No hashing, bulk counting in horizon nodes
perft( 1)= 20 ( 0.000 sec)
perft( 2)= 400 ( 0.000 sec)
perft( 3)= 8902 ( 0.000 sec)
perft( 4)= 197281 ( 0.000 sec)
perft( 5)= 4865609 ( 0.031 sec)
perft( 6)= 119060324 ( 0.625 sec)
perft( 7)= 3195901860 (16.576 sec)
perft( 8)= 84998978956 (441.816 sec)
| Position | Depth | Node Count | Charon (seconds) | QPerft (seconds) | Charon (mnps) | QPerft (mnps) |
|---|---|---|---|---|---|---|
| KiwiPete | 6 | 8031647685 | 20.766 | 41.636 | 401.5 | 192.9 |
| 3 | 8 | 3009794393 | 15.703 | 28.467 | 191.7 | 105.7 |
| 4 | 6 | 706045033 | 1.953 | 5.406 | 361.5 | 130.6 |
| 5 | 5 | 89941194 | 0.234 | 0.635 | 384.3 | 141.6 |
| 6 | 6 | 6923051137 | 16.859 | 24.300 | 410.6 | 284.9 |