How many positions are in the Nunn test suite?

[Volker Pittlik]

IIRC there were two suites with 10 positions each.

At CSS they claim there is one suite with 20 positions (http://www.computerschach.de/index.php?option=com_remository&Itemid=52&func=select&id=4), but the files they offer contains 25 positions.

Does someone really know?

confused

Volker

[Niyaz Khasanov]

Nunn initially created a test of 10 positions:
r2qk2r/5pbp/p1np4/1p1Npb2/8/N1P5/PP3PPP/R2QKB1R w KQkq -
r1b2rk1/1pq1bppp/p1nppn2/8/3NP3/1BN1B3/PPP1QPPP/2KR3R w - -
r3k2r/p1qbnppp/1pn1p3/2ppP3/P2P4/2PB1N2/2P2PPP/R1BQ1RK1 b kq -
r1b2rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 b - -
r1bqrnk1/pp2bppp/2p2n2/3p2B1/3P4/2NBPN2/PPQ2PPP/R4RK1 w - -
rnbq1rk1/pp2ppbp/6p1/8/3PP3/5N2/P3BPPP/1RBQK2R b K -
2rq1rk1/p2nbppp/bpp1p3/3p4/2PPP3/1PB3P1/P2N1PBP/R2Q1RK1 b - e3
r1bqnrk1/ppp1npbp/3p2p1/3Pp3/2P1P3/2N1B3/PP2BPPP/R2QNRK1 b - -
r1bq1rk1/ppp1npbp/2np2p1/4p3/2P5/2NPP1P1/PP2NPBP/R1BQ1RK1 b - -
rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/q1N5/P1PQ2PP/1R2KB1R w Kkq -

Later Nunn created "nunn2" test of 20 positions:
r2qkb1r/pp1n1ppp/2p2n2/3pp2b/4P3/3P1NPP/PPPN1PB1/R1BQ1RK1 b kq e3
r2q1rk1/ppp1bppp/1nn1b3/4p3/1P6/P1NP1NP1/4PPBP/R1BQ1RK1 b - b3
rnbq1rk1/p3ppbp/1p1p1np1/2p5/3P1B2/2P1PN1P/PP2BPP1/RN1QK2R w KQ -
r1b1qrk1/ppp1p1bp/n2p1np1/3P1p2/2P5/2N2NP1/PP2PPBP/1RBQ1RK1 b - -
rnbq1rk1/1p2ppbp/2pp1np1/p7/P2PP3/2N2N1P/1PP1BPP1/R1BQ1RK1 b - -
2kr3r/ppqn1pp1/2pbp2p/7P/3PQ3/5NP1/PPPB1P2/2KR3R w - -
r3kb1r/pp2pppp/1nnqb3/8/3p4/NBP2N2/PP3PPP/R1BQ1RK1 b kq -
r2qk2r/5pbp/p1npb3/3Np2Q/2B1Pp2/N7/PP3PPP/R4RK1 b kq -
r1bqk2r/4bpp1/p2ppn1p/1p6/3BPP2/2N5/PPPQ2PP/2KR1B1R w kq b6
r1b1k2r/1pq3pp/p1nbpn2/3p4/3P4/2NB1N2/PP3PPP/R1BQ1RK1 w kq -
rn1q1rk1/pp3ppp/3b4/3p4/3P2b1/2PB1N2/P4PPP/1RBQ1RK1 b - -
r1b1kb1r/ppp2ppp/2p5/4Pn2/8/2N2N2/PPP2PPP/R1B2RK1 w kq -
r2qrbk1/1b1n1p1p/p2p1np1/1p1Pp3/P1p1P3/2P2NNP/1PB2PP1/R1BQR1K1 w - -
r2q1rk1/pp1n1ppp/2p1pnb1/8/PbBPP3/2N2N2/1P2QPPP/R1B2RK1 w - -
r1bq1rk1/1p2bppp/p1n1pn2/8/P1BP4/2N2N2/1P2QPPP/R1BR2K1 b - -
r1b2rk1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/2KR1B1R b - -
rnbq1rk1/2pnppbp/p5p1/1p2P3/3P4/1QN2N2/PP3PPP/R1B1KB1R w KQ -
rnb2rk1/ppp1qppp/3p1n2/3Pp3/2P1P3/5NP1/PP1N1PBP/R2Q1RK1 w - -
r2q1rk1/pbpn1pp1/1p2pn1p/3p4/2PP3B/P1Q1PP2/1P4PP/R3KBNR w KQ -
r3qrk1/1ppb1pbn/n2p2pp/p2Pp3/2P1P2B/P1N5/1P1NBPPP/R2Q1RK1 w - -

Other "nunn" tests are not created by GM Nunn himself.

[Volker Pittlik]

...
Other "nunn" tests are not created by GM Nunn himself.

Thank you Niyaz. Meanwhile I found the on another site too and they are identical with yours

Volker