Rocinante.20.32.ja bug

[urbanmusic]

Tried to replicate it, but could not get same warning... It actually chose Ba6 in later tests.
Arena GUI. Arena's supplied Perfect book.

Previous move

4952032*2*Child Process Prio Adj: PID 12500 conhost.exe
4952032*2*Start calc, move no: 23
4952047 >second : position startpos moves g1f3 d7d5 d2d4 g8f6 c2c4 d5c4 b1c3 c7c6 a2a4 d8b6 e2e3 b6b4 a4a5 f6d5 d1d2 b7b5 a5b6 d5b6 c3a4 e7e6 d2b4 f8b4 c1d2
4952047 >second : go wtime 981895 btime 860244 winc 0 binc 0 movestogo 29
4952063 <second : info score cp -57 depth 17 nodes 0 time 1 nps 0 seldepth 17 hashfull 0 pv b4d2 f3d2 c8a6 a4b6 a7b6 d2c4 b6b5 c4a5 e8g8 f1d3 f8d8 d3e4 a6b7 e1g1 d8d7 a5b7 a8a1
4980204 <second : info score cp -58 depth 20 nodes 7871 time 28166 nps 279 seldepth 20 hashfull 0 pv b4d2 f3d2 c8a6 a4b6 a7b6 d2c4 b6b5 c4a5 e8g8 f1d3 f7f6 d3e4 a6c8 e1g1 c8d7 f2f4 a8a7 f1c1 f6f5 e4d3
4980219 <second : bestmove b4d2
4980219*2*Found move:Bb4xd2

Assertion failed

5012110*2*Child Process Prio Adj: PID 12500 conhost.exe
5012110*2*Start calc, move no: 25
5012110 >second : position startpos moves g1f3 d7d5 d2d4 g8f6 c2c4 d5c4 b1c3 c7c6 a2a4 d8b6 e2e3 b6b4 a4a5 f6d5 d1d2 b7b5 a5b6 d5b6 c3a4 e7e6 d2b4 f8b4 c1d2 b4d2 f3d2
5012110 >second : go wtime 950321 btime 832077 winc 0 binc 0 movestogo 28
5012125 <second : info score cp -58 depth 18 nodes 0 time 1 nps 0 seldepth 18 hashfull 0 pv c8a6 a4b6 a7b6 d2c4 b6b5 c4a5 e8g8 f1d3 f7f6 d3e4 a6c8 e1g1 c8d7 f2f4 a8a7 f1c1 f6f5 e4d3
5026313 <second : Assertion failed: this->Color != New->Color, file TreeNode.cpp, line 118
5026313 <second : This application has requested the Runtime to terminate it in an unusual way.
5026329 <second : Please contact the application's support team for more information.
5846204 >second : stop
5847469****Tour**Game end: 1-0 {1-0 Black forfeits on time}

[pgn][Event "40/20"]
[Site "Test_Site"]
[Date "2026.07.11"]
[Round "1"]
[White "18 MR"]
[Black "Rocinante-20-32-ja"]
[Result "1-0"]
[ECO "D16"]
[WhiteElo "1800"]
[BlackElo "1800"]
[PlyCount "26"]
[EventDate "2026.??.??"]

1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. Nc3 c6 5. a4 Qb6 6. e3 Qb4 7. a5 Nd5 8. Qd2
b5 9. axb6 Nxb6 10. Na4 e6 11. Qxb4 Bxb4+ 12. Bd2 Bxd2+ 13. Nxd2 1-0

[/pgn]