Fortress Xiangqi: twenty engine games

Companion study to the Fortress Xiangqi rules article: the twenty engine self-play games the article’s sample game was chosen from, in full. Fairy-Stockfish on both sides with opening sampling and anti-repetition steering, so the reserve actually gets used. Chapter one is the game the article embeds. Article: /rules/fortress-xiangqi

20 章

1. Game 1: Red mates on move 44 (the article’s game)87 手

   Black held the edge before the break, peaking at -100. The engine eval stayed inside a pawn of level through ply 51 of 87. The position broke open on ply 52. 20 drops (Red 11, Black 9). Red mates with the drop T@d8.

2. Game 2: Black mates on move 62124 手

   The advantage changed hands: Red peaked at +356 on ply 85, Black at -238 on ply 95. The engine eval stayed inside a pawn of level through ply 94 of 124. The position broke open on ply 96. 23 drops (Red 11, Black 12). Black mates with c2b2.

3. Game 3: Black mates on move 53106 手

   The advantage changed hands: Red peaked at +107 on ply 9, Black at -387 on ply 46. The engine eval stayed inside a pawn of level through ply 45 of 106. The position broke open on ply 47. 29 drops (Red 14, Black 15). Black mates with the drop T@a4.

4. Game 4: Red mates on move 65129 手

   Red held the edge before the break, peaking at +327. The engine eval stayed inside a pawn of level through ply 54 of 129. The position broke open on ply 60. 32 drops (Red 18, Black 14). Red mates with the drop T@f7.

5. Game 5: Black mates on move 4794 手

   Black held the edge before the break, peaking at -369. The engine eval stayed inside a pawn of level through ply 55 of 94. The position broke open on ply 64. 19 drops (Red 10, Black 9). Black mates with c1b2.

6. Game 6: Red mates on move 3569 手

   The advantage changed hands: Red peaked at +425 on ply 32, Black at -223 on ply 15. The engine eval stayed inside a pawn of level through ply 30 of 69. The position broke open on ply 45. 12 drops (Red 7, Black 5). Red mates with the drop T@f6.

7. Game 7: Red mates on move 4181 手

   Red held the edge before the break, peaking at +346. The engine eval stayed inside a pawn of level through ply 48 of 81. The position broke open on ply 52. 13 drops (Red 6, Black 7). Red mates with the drop T@e7.

8. Game 8: Black mates on move 67134 手

   The advantage changed hands: Red peaked at +100 on ply 71, Black at -361 on ply 94. The engine eval stayed inside a pawn of level through ply 90 of 134. The position broke open on ply 96. 17 drops (Red 8, Black 9). Black mates with c1b1.

9. Game 9: Black mates on move 2856 手

   The advantage changed hands: Red peaked at +266 on ply 11, Black at -356 on ply 29. The engine eval stayed inside a pawn of level through ply 25 of 56. The position broke open on ply 30. 11 drops (Red 5, Black 6). Black mates with the drop N@b4.

10. Game 10: Black mates on move 53106 手

    Black held the edge before the break, peaking at -393. The engine eval stayed inside a pawn of level through ply 27 of 106. The position broke open on ply 60. 18 drops (Red 8, Black 10). Black mates with the drop P@b1.

11. Game 11: Black mates on move 4080 手

    The advantage changed hands: Red peaked at +84 on ply 5, Black at -396 on ply 24. The engine eval stayed inside a pawn of level through ply 21 of 80. The position broke open on ply 25. 17 drops (Red 8, Black 9). Black mates with the drop R@a2.

12. Game 12: Black mates on move 3468 手

    The advantage changed hands: Red peaked at +89 on ply 7, Black at -382 on ply 39. The engine eval stayed inside a pawn of level through ply 24 of 68. The position broke open on ply 40. 12 drops (Red 6, Black 6). Black mates with c2b2.

13. Game 13: Red mates on move 3365 手

    Red held the edge before the break, peaking at +365. The engine eval stayed inside a pawn of level through ply 22 of 65. The position broke open on ply 29. 14 drops (Red 8, Black 6). Red mates with the drop T@g5.

14. Game 14: Black mates on move 3468 手

    Black held the edge before the break, peaking at -253. The engine eval stayed inside a pawn of level through ply 19 of 68. The position broke open on ply 26. 16 drops (Red 7, Black 9). Black mates with the drop R@a1.

15. Game 15: Red mates on move 2651 手

    Red held the edge before the break, peaking at +384. The engine eval stayed inside a pawn of level through ply 17 of 51. The position broke open on ply 22. 11 drops (Red 7, Black 4). Red mates with the drop P@f8.

16. Game 16: Red mates on move 4385 手

    Red held the edge before the break, peaking at +288. The engine eval stayed inside a pawn of level through ply 28 of 85. The position broke open on ply 37. 16 drops (Red 8, Black 8). Red mates with e7f8.

17. Game 17: Red mates on move 4181 手

    Red held the edge before the break, peaking at +332. The engine eval stayed inside a pawn of level through ply 14 of 81. The position broke open on ply 19. 17 drops (Red 10, Black 7). Red mates with g8g7.

18. Game 18: Red mates on move 2243 手

    Red held the edge before the break, peaking at +207. The engine eval stayed inside a pawn of level through ply 12 of 43. The position broke open on ply 14. 10 drops (Red 6, Black 4). Red mates with the drop R@e5.

19. Game 19: Red mates on move 4079 手

    Red held the edge before the break, peaking at +384. The engine eval stayed inside a pawn of level through ply 10 of 79. The position broke open on ply 17. 12 drops (Red 6, Black 6). Red mates with f6f7.

20. Game 20: drawn by repetition on move 2550 手

    Red held the edge before the break, peaking at +211. The engine eval stayed inside a pawn of level through ply 50 of 50. 11 drops (Red 6, Black 5). Drawn by threefold repetition: neither side could force a way in.