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, 30 insertions, 0 deletions

diff --git a/tests/ecm_quick.epd b/tests/ecm_quick.epd
new file mode 100644
index 0000000..2246099
--- /dev/null
+++ b/tests/ecm_quick.epd
@@ -0,0 +1,30 @@
+2q1r1k1/1ppb4/r2p1Pp1/p4n1p/2P1n3/5NPP/PP3Q1K/2BRRB2 w - - bm f7+; id "ECM.001";
+7r/1p2k3/2bpp3/p3np2/P1PR4/2N2PP1/1P4K1/3B4 b - - bm Bxf3+; id "ECM.002";
+4k3/p1P3p1/2q1np1p/3N4/8/1Q3PP1/6KP/8 w - - bm Qb5; id "ECM.003";
+2r1b1k1/R4pp1/4pb1p/1pBr4/1Pq2P2/3N4/2PQ2PP/5RK1 b - - bm Rcxc5; id "ECM.004";
+6k1/p1qb1p1p/1p3np1/2b2p2/2B5/2P3N1/PP2QPPP/4N1K1 b - - bm Bxf2+; id "ECM.005";
+3q4/pp3pkp/5npN/2bpr1B1/4r3/2P2Q2/PP3PPP/R4RK1 w - - bm Bxf6+; id "ECM.006";
+3rr1k1/pb3pp1/1p1q1b1p/1P2NQ2/3P4/P1NB4/3K1P1P/2R3R1 w - - bm Rxg7+; id "ECM.007";
+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";
+2r4k/pB4bp/6p1/6q1/1P1n4/2N5/P4PPP/2R1Q1K1 b - - bm Qxc1; id "ECM.010";
+1r5r/3b1pk1/3p1np1/p1qPp3/p1N1PbP1/2P2PN1/1PB1Q1K1/R3R3 b - - bm Nxg4; id "ECM.011";
+5rk1/7p/p1N5/3pNp2/2bPnqpQ/P7/1P3PPP/4R1K1 w - - bm Ne7+; id "ECM.012";
+rnb2rk1/pp2np1p/2p2q1b/8/2BPPN2/2P2Q2/PP4PP/R1B2RK1 w - - bm Nd5; id "ECM.013";
+2k4r/1pp2ppp/p1p1bn2/4N3/1q1rP3/2N1Q3/PPP2PPP/R4RK1 w - - bm Nd5; id "ECM.014";
+r3kb1r/pp2pppp/3q4/3Pn3/6b1/2N1BN2/PP3PPP/R2QKB1R w KQkq - bm Nxe5; id "ECM.015";
+2rr2k1/1b3p1p/p4qpb/2R1n3/3p4/BP2P3/P3QPPP/3R1BKN b - - bm Rxc5; id "ECM.016";
+r1b1k3/5p1p/p1p5/3np3/1b2N3/4B3/PPP1BPrP/2KR3R w q - bm Rxd5; id "ECM.017";
+r3rbk1/1pq2ppp/2ppbnn1/p3p3/P1PPN3/BP1BPN1P/2Q2PP1/R2R2K1 w - - bm Nxd6; id "ECM.018";
+b7/2q2kp1/p3pbr1/1pPpP2Q/1P1N3P/6P1/P7/5RK1 w - - bm Rxf6+; id "ECM.019";
+1rr1nbk1/5ppp/3p4/1q1PpN2/np2P3/5Q1P/P1BB1PP1/2R1R1K1 w - - bm Bxa4; id "ECM.020";
+r7/5kp1/2p1p2p/1p1n3P/2rP4/2P3R1/PK2RPP1/2B5 b - - bm Rxc3; id "ECM.021";
+r1r3k1/p3qpp1/b1P4p/3p4/3Nn3/4P3/P1Q2PPP/1BR1K2R b K - bm Qb4+; id "ECM.022";
+rn3rk1/4bppp/1q2p3/p2pP3/8/1PN2B1P/P4PP1/2RQ1RK1 w - - bm Bxd5; id "ECM.023";
+6rk/1p1br2p/pqp5/3pNP2/3Pp3/P5PR/5PKR/Q7 w - - bm Rxh7+; id "ECM.024";
+2b3k1/5p1p/7b/p2B3p/3P4/P2Q1N1P/1q3PP1/6K1 w - - bm Bxf7+; id "ECM.025";
+r1b5/4k3/p7/3p1n2/3Bp3/2P2r1P/PPBK1P2/4R2R w - - bm Bc5+; id "ECM.026";
+r4rk1/1b3Npp/p7/1p3Q2/3P4/1B2q3/P5PP/3n1R1K b - - bm Bxg2+; id "ECM.027";
+r1b2rk1/2q2ppp/2pbp3/p7/4Nn2/3B4/PPPBQ1PP/R4R1K w - - bm Rxf4; id "ECM.028";
+3r2k1/1q1P1ppp/r2R2n1/p4Q2/1ppB2R1/6P1/PP3PP1/6K1 w - - bm Rgxg6; id "ECM.029";
+r2q1rk1/p3b1pp/2p5/1pn5/1n1Bp1b1/1P6/PQ1PPP2/2RNKBNR b K - bm Bxe2; id "ECM.030";