Add search self-tests (hash consistency, QSearch sanity) and a native EPD parser (`epd` command + ParseEpdRecord), fixing a silent-corruption bug in convert_epd.pl that broke every Black-to-move EPD conversion.

testsearch.c: TestSearchHashConsistency exercises the hash table through real search (repeat-with-warm-table and shallow-then-deep agreement) rather than synthetic store/probe calls. TestQSearchSanity checks termination and a node-count ceiling; its own header documents that the TEST=1 self-test build doesn't define PERF_COUNTERS, so it checks whole-search node count rather than the qsearch-only counter. A planned null-move zugzwang test was dropped in favor of tests/zugzwang.epd (best-move outcome, not an internal counter) after the three classic literature positions turned out not to structurally reach this engine's verification-search code path on this build.

fen.c/script.c/command.c: new `epd <file>` command reads raw EPD directly via ParseEpdRecord, reusing ScriptCommand's existing suite-reporting machinery (factored into _ProcessSuiteLine/_PrintSuiteReport). Replaces the need for tests/convert_epd.pl, which had a real bug: its bm/am regex's [^b]+ filler breaks on any Black-to-move record (side-to-move field is literally "b"), and unscoped $fen/$id/$solution globals meant a failed match silently duplicated the previous record instead of erroring.

tests/ep_to_epd.pl converts the existing setboard/solution/avoid/id/go suites back to real EPD; cross-checked ecm_ringers.ep_ via `script` against ecm_ringers.epd via `epd` -- byte-identical node counts and solve stats. Added .epd siblings for every genuine tactical suite in tests/.

Added src/TESTING_PLAN.md: full audit of test*.c coverage gaps (dead SEE oracle, unwired eval/recognizer tests, zero hash-table correctness coverage, thin search self-tests) with a prioritized plan for closing them.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

1 files changed, 90 insertions, 0 deletions

diff --git a/tests/ecm_confident_quick.epd b/tests/ecm_confident_quick.epd
new file mode 100644
index 0000000..1a90c75
--- /dev/null
+++ b/tests/ecm_confident_quick.epd
@@ -0,0 +1,90 @@
+2r2bk1/4qp2/3n2p1/2R1p1Np/2p1N3/r6P/1Q3PP1/3R2K1 w - - bm Rxc8; id "ECM.035";
+r2b1rk1/5qp1/2p2P2/2p3Pp/p6P/2Q5/PPP5/2KR2R1 w - - bm g6; id "ECM.147";
+r1b2rk1/1pqp1ppp/p1n1pn2/5N2/8/2PBB3/P1P2PPP/R2QR1K1 w - - bm Nxg7; id "ECM.280";
+r1b1r1k1/pp3p1p/1q2p1pQ/2b1P1B1/8/P2B3P/1P3PP1/2R1R1K1 w - - bm Rxc5; id "ECM.339";
+3r1rk1/1pq1bppp/p7/n2RN3/P7/1P6/1B2QPPP/R5K1 w - - bm Nd7; id "ECM.382";
+r1b2rk1/1p3pbp/2p3p1/p1q5/1P6/1Q4P1/1P2PPBP/R1B1R1K1 b - - bm Be6; id "ECM.591";
+2kr3r/ppp1qpp1/2p5/2b2b2/2P1pPP1/1P2P1p1/PBQPB3/RN2K1R1 b Q - bm Rh1; id "ECM.610";
+5rk1/pbrn1ppp/1ppN1q2/2P1p3/3P4/1PRB4/P3QPPP/5RK1 w - - bm Bxh7+; id "ECM.672";
+rq1r1bk1/1b3pp1/3pn2p/1n2BN1P/1P2P3/3R1NP1/3Q1PB1/2R3K1 w - - bm Bxg7; id "ECM.728";
+2r3k1/pbq1np1p/1p1b1Bp1/8/6QP/2P2N2/B4PP1/4R1K1 w - - bm Bxf7+; id "ECM.733";
+6k1/p1qb1p1p/1p3np1/2b2p2/2B5/2P3N1/PP2QPPP/4N1K1 b - - bm Bxf2+; id "ECM.005";
+r1b1r1k1/p1p3pp/2p2n2/2bp4/5P2/3BBQPq/PPPK3P/R4N1R b - - bm Bg4; id "ECM.008";
+3r4/1b2k3/1pq1pp2/p3n1pr/2P5/5PPN/PP1N1QP1/R2R2K1 b - - bm Rxh3; id "ECM.009";
+r1b2r1k/3nN2p/p2Q1p2/8/4PP2/1R6/q1PK2PP/4R3 w - - bm Qd5; id "ECM.033";
+2k4r/ppp1n1p1/2n2qb1/2N5/Q1P3p1/P2r3P/1P3PB1/R1B2RK1 w - - bm Qb5; id "ECM.037";
+r1b1rnk1/1p3pb1/1qpp2p1/2n5/2PNP2p/1PN3PP/3R1PBK/BR1Q4 b - - bm Rxa1; id "ECM.039";
+5r1k/pb2r1bp/1p2B1p1/n7/4qNQ1/4B3/P4PPP/2RR2K1 w - - bm Rd4; id "ECM.080";
+1r3rk1/5pp1/1n2qn1p/1p1pPNb1/2pP2QP/2P5/1PB3P1/R1B1R1K1 w - - bm exf6; id "ECM.082";
+r1k4r/ppp1b3/5Npp/4pb1Q/8/1B2B3/PqP2PPP/2RR2K1 w - - bm Qxf5+; id "ECM.107";
+r1b1rk2/pp3ppQ/1np5/4q3/2B4N/4P3/PP3PP1/2R2K1R w - - bm Qg8+; id "ECM.114";
+rnb1r1k1/pp5p/2pp2p1/4b3/2P1P2q/1NN1BPp1/PP1QB1P1/3RR1K1 b - - bm Bf4; id "ECM.140";
+1r2k2r/p5bp/4p1p1/q2pn3/1p2N1P1/6QP/PPP5/1KBR3R w k - bm Bh6; id "ECM.149";
+3qn2k/1p3Bp1/rbn4p/2p5/p1P2p2/P2b2PP/1BQNRP2/1R4K1 w - - bm Qxd3; id "ECM.173";
+1q6/2rk1p2/p1n1b1rN/3p2p1/8/3Q4/PP1B1PPP/2R1R1K1 w - - bm Nxf7; id "ECM.176";
+3r2k1/p2r1p1p/1pR1p1qP/3P1pP1/3R4/1P2Q3/P4K2/8 w - - bm dxe6; id "ECM.183";
+1r3rk1/p4pbp/q1p2pp1/3p1b2/1n1P1P1B/PB3N2/1PPQR1PP/2KR4 b - - bm Bxc2; id "ECM.194";
+2q1r1k1/1b3pbp/3p2p1/1Ppn3n/5P2/5B2/1P1B2PP/R2NNQ1K b - - bm Ndxf4; id "ECM.208";
+8/2p2Q1p/1rp5/p3q1kp/P7/2P2RP1/5PK1/8 w - - bm Rf5+; id "ECM.233";
+6k1/3b1p1p/6p1/2BPR3/8/4Q2P/1q3rPK/8 w - - bm Re8+; id "ECM.235";
+6rr/1b3k1p/pbqppPn1/1p5Q/4PN2/P6R/1PP3BP/2B2R1K w - - bm Qxh7+; id "ECM.243";
+2r1rbk1/5pp1/bq5p/1pnBPN2/6Q1/N7/5PPP/R2R2K1 w - - bm Bxf7+; id "ECM.250";
+r5k1/pp2ppb1/4qn2/r3B1p1/3P4/3QNP1R/PP2K1P1/7R w - - bm Bxf6; id "ECM.252";
+1R2br1k/5r1p/p2p1P2/6RQ/3p1P2/4p2B/q6P/5N1K w - - bm Rxe8; id "ECM.253";
+4Rnk1/2p2pp1/3r3p/p2P4/P5Q1/1B5P/5PK1/q7 w - - bm Rxf8+; id "ECM.257";
+r2qk2r/1pp2ppp/p3pnn1/6N1/1B1P2P1/1Q2P2P/PP3PK1/R6R b kq - bm Nh4+; id "ECM.272";
+5r1k/1pqb3p/2n5/p1pB4/2Pp1r1P/1P5P/R2N2K1/3Q1R2 b - - bm Bxh3+; id "ECM.282";
+r1rbb3/1R3pkp/2pBp1p1/p3P3/q6P/6P1/P2Q1P2/1R3BK1 w - - bm R1b4; id "ECM.316";
+r3r1k1/pbqn1ppp/1p3n2/1Pb5/2p5/5N1P/PBQ1BPP1/1N1R1RK1 b - - bm Rxe2; id "ECM.337";
+1k2r2r/1bpQN2p/1p6/P3p2q/4np2/2P2N2/2P2PPP/R3R1K1 b - - bm Rxe7; id "ECM.340";
+2b1r2k/2Q4p/4q3/1pp5/3b4/4NP2/1P3BP1/3R2K1 w - - bm Rxd4; id "ECM.348";
+2rq3r/5p2/p3pkbQ/3p4/3N4/2P4R/P4PP1/4R1K1 w - - bm Rf3+; id "ECM.352";
+r3r1k1/4pp1p/b5pB/q1pP4/3b4/2N4P/PP4P1/R2RQ2K w - - bm Rxd4; id "ECM.357";
+r3k3/1pqb1p2/p3p3/4n2r/3N1Q2/2P5/PP4B1/4RRK1 w q - bm Rxe5; id "ECM.364";
+7k/p1p1r2p/1p1pnr1q/5pp1/2PPPp2/2PB1P1P/P2Q1PRK/7R b - - bm g4; id "ECM.372";
+7k/5rp1/p1bQB2p/1p4nN/4P3/1Pq5/P5PP/3R3K b - - bm Bxe4; id "ECM.386";
+r3r1k1/1pp2p1b/7p/2Q5/2PP2p1/2P1NpPq/P2R1P1P/6RK b - - bm Rxe3; id "ECM.391";
+3r2k1/pb3p1p/1q4p1/2b1P3/1Pp5/2P1p1P1/P3Q1BP/R1B4K b - - bm Qc6; id "ECM.400";
+1r1q1k2/R4pp1/5p1r/1p1p1n1p/3Pb2N/1BP5/2P1Q1PP/4R1K1 w - - bm Qxe4; id "ECM.405";
+8/2R4p/2R3bk/8/5N1P/1p3PP1/2pqP1K1/8 w - - bm g4; id "ECM.426";
+2r3k1/n3qppp/1B1r1n2/N7/N4P2/1Q4PP/P5B1/R1b4K b - - bm Qe1+; id "ECM.444";
+7r/2p1q1k1/1p3r1p/p1pPpPp1/2P1P1P1/PP6/3Q2KR/7R w - - bm Qxg5+; id "ECM.445";
+6r1/6rk/3p3p/p2Rp3/R1PqPp1b/2N2Q2/6PP/7K b - - bm Rxg2; id "ECM.450";
+r2r3k/ppq3pp/2p1n3/4NQ2/3P4/1B6/PP3PPP/6K1 w - - bm Ng6+; id "ECM.454";
+r2q1rk1/pp1n2pp/2pb4/1P1p3n/P1PPpP2/4P2b/1BNNBP1P/R2QR1K1 b - - bm Nxf4; id "ECM.496";
+r2qkr2/1p3pQp/2p1b3/1B1pN3/1p6/8/1P1K1PPP/2B1R3 w q - bm Nxc6; id "ECM.502";
+1k1r2r1/p1p3q1/2p2p2/3pn3/1P1b2bB/1QN5/P4PPP/1R2RBK1 b - - bm Nf3+; id "ECM.519";
+r2q4/5p1P/2p1bR2/ppk1p1P1/3pB2Q/8/PPP5/6K1 w - - bm g6; id "ECM.521";
+5r1k/1q2R3/8/6Q1/8/8/6P1/7K b - - bm Rf1+; id "ECM.548";
+r5r1/4q2k/p2p3p/5p2/4p3/P2QR3/1PP2PPP/4R1K1 w - - bm Rxe4; id "ECM.558";
+1r4nk/3b2bp/3p4/3P3p/2pNPq2/P1N2p1P/1P3Q2/1R4KR b - - bm Rxb2; id "ECM.570";
+4r1k1/1ppQr1p1/1p1p1pP1/3P3p/7P/1P3q2/P1P5/1KRR4 w - - bm Re1; id "ECM.574";
+4k3/4Bp2/1p2nP1P/2p5/2K1b1B1/8/P7/8 w - - bm Bf3; id "ECM.584";
+1r3qk1/pb3p1p/1pn2PpQ/2pN4/3r4/5B2/PPP4P/4RRK1 w - - bm Ne7+; id "ECM.611";
+8/p3q1k1/6p1/1p3nP1/2pp1QBr/P2P4/1PP2K2/R7 b - - bm Qe3+; id "ECM.618";
+3q1k2/5p2/p5pN/1b2Q2P/8/8/5PPK/8 w - - bm Qh8+; id "ECM.622";
+8/6kP/6p1/1p1pP3/pP6/P1n2K2/2N5/8 w - - bm e6; id "ECM.638";
+5r2/R4p2/5P1k/4PK2/1p6/8/8/8 w - - bm Rxf7; id "ECM.643";
+1r1qr1k1/5p1p/1n2p1p1/pp1pP1P1/2pP1BB1/PnP3P1/1P3PK1/1R1Q3R w - - bm Rxh7; id "ECM.663";
+1r2rnk1/2R2bpp/p2q4/1p1N2R1/5P2/1Q1B3P/PP4P1/7K w - - bm Rxg7+; id "ECM.702";
+4rrk1/2qb2pp/p5P1/1p2p3/1b2P3/2N5/PPPQ4/1K1R2R1 w - - bm gxh7+; id "ECM.704";
+3r1rk1/5pp1/pq1n1n1p/2pPR3/2B2P2/1PBQ2RP/P5P1/6K1 w - - bm Rxg7+; id "ECM.715";
+rn3rk1/ppq2ppp/2pb1nb1/5N2/2BP4/8/PPP1N1P1/R1B1QR1K w - - bm Nxg7; id "ECM.716";
+r4rk1/1p1q1ppp/p1b4B/8/2R3R1/P2P4/1b1N1QPP/6K1 w - - bm Bxg7; id "ECM.723";
+r1bqkbnr/pp2ppp1/2p4p/3n2N1/2BP4/5N2/PPP2PPP/R1BQK2R w KQkq - bm Nxf7; id "ECM.731";
+r2qr1k1/1ppb1p1p/p1np2p1/7Q/3PP2b/1B2N2P/PP3PP1/R1B2RK1 w - - bm Bxf7+; id "ECM.732";
+r2r2k1/1b2qpp1/1p2n3/p1b1p2p/4P1n1/PP1B2PP/1B1NQP2/R3NRK1 b - - bm Nxf2; id "ECM.736";
+2r1r1k1/1pq1bp1p/p3pnp1/P2n2N1/7R/2P4P/1PB1QPP1/2B1R1K1 w - - bm Nxf7; id "ECM.748";
+2rqrbk1/pb1n1p1p/1p2pnp1/4N3/2BP1N2/1P2Q3/PB3PPP/3R1RK1 w - - bm Nxf7; id "ECM.757";
+r1bqrbk1/5p1p/2pp2nB/pp5Q/4P3/PBNPR2P/1P4P1/R5K1 w - - bm Bxf7+; id "ECM.759";
+r2r4/p4pk1/2p3p1/1p1nPR2/5p1Q/2N5/PPPq4/1K4R1 w - - bm e6; id "ECM.807";
+r2q1rk1/pp2ppb1/3pn1pQ/3R4/2P3B1/4BR2/PP4PP/6K1 w - - bm Qxg6; id "ECM.813";
+r2q1rk1/pb1nbp1p/1p2p1p1/4N1BQ/2PP4/P7/5PPP/RB2R1K1 w - - bm Nxg6; id "ECM.817";
+k7/pp1N4/4P3/5P2/8/5p2/1R6/B4Knq w - - bm Nb6+; id "ECM.823";
+1rbq2k1/b1p3pp/p1Pp4/3Ppr2/8/5N2/PPQ2PPP/R1B2RK1 b - - bm Rxf3; id "ECM.826";
+1n2r3/p1pq1kp1/1b1pNpp1/3P4/5RP1/3Q3P/1B3P2/6K1 w - - bm Bxf6; id "ECM.830";
+r1b1k1nr/3n1p1p/1qpBp1p1/pp2b3/4PN2/PBN2Q2/1PP2PPP/2KR3R w kq - bm Nxe6; id "ECM.842";
+r3k2r/1q3ppp/p3p3/2b1P3/p2N1Q2/P7/1PP3PP/3R1R1K w kq - bm Nxe6; id "ECM.845";
+1r6/5pk1/p1b2qpp/P1P1n3/1N6/Q5NP/5PP1/3R2K1 b - - bm Bxg2; id "ECM.859";
+2R5/p3q1kp/6p1/3p4/b2P2p1/Pr4N1/5Q2/3K3R w - - bm Nf5+; id "ECM.861";
+1r3r2/6kp/3p1pp1/qnp1pP2/1p2P2N/3P4/PPPQ1P1P/1K1R2R1 w - - bm fxg6; id "ECM.870";