MESON Chess Problem Database

Problem Display
PID: 256874 (1b2R3/R1p2N1n/rr3k2/q4p2/pN5P/6Q1/B6K/8 w - - 0 1)

Easter, Norris

British Chess Magazine, 1933

1b2R3/R1p2N1n/rr3k2/q4p2/pN5P/6Q1/B6K/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sf8
      • 2.Qg5#
    • 1...c5
      • 2.Sd5#
    • 1...c6
      • 2.Re6#
  • Tries
    • 1.Sd5+?
      • 1...Kxf7
        • 2.Qg8#
      • 1...Qxd5!
    • 1.Sh8?
      • threat
        • 2.Qg6#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Sf8
        • 2.Qg5#
      • 1...c5
        • 2.Sd5#
        • 2.Rf7#
      • 1...c6
        • 2.Rf7#
        • 2.Re6#
      • 1...Re6!
  • Keys
    • 1.h5!
      • threat
        • 2.Qg6#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Sf8
        • 2.Qg5#
      • 1...c5
        • 2.Sd5#
      • 1...c6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::QAB1(C),XS(h)
    • S(h);N_GUARD::QAB1(C)
    • P(g);P_PINQ(C),S_CUTQ(b)::S(D)
    • P(g);P_PINQ(C),S_CUTR(e)::R1(H)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(g),S_CUTQ(b),XS(G)::QAB1(C)
      • Refutation
        • Q(b);XS(D)
    • Try
      • S(G);
      • Threat
        • QAR1(C)
      • Vars
        • S(h);N_GUARD::QAB1(C),XS(h)
        • Q(b);N_GUARD,P_PINQ(C)::QAB1(C),XQ(b)
        • S(h);N_GUARD::QAB1(C)
      • Refutation
        • R(e);
  • Actual
    • P(E);
    • Threat
      • QAR1(C)
    • Vars
      • S(h);N_GUARD::QAB1(C),XS(h)
      • Q(b);N_GUARD,P_PINQ(C)::QAB1(C),XQ(b)
      • S(h);N_GUARD::QAB1(C)
      • P(g);P_PINQ(C),S_CUTQ(b)::S(D)
      • P(g);P_PINQ(C),S_CUTR(e)::R1(H)
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