MESON Chess Problem Database

Problem Display
PID: 258377 (Rn1q3k/2Rp1QpN/2p1B2p/2P5/5N1n/8/8/7K w - - 0 1)

Hurley, WT

English Mechanic and World of Science, 1891

(First published on Fri Dec 18 1891)

Rn1q3k/2Rp1QpN/2p1B2p/2P5/5N1n/8/8/7K

#2

8 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Qg8#
    • 1...Qf6
      • 2.Qg8#
    • 1...Qxc7
      • 2.Qg8#
    • 1...Qe7
      • 2.Qg8#
    • 1...Qg8
      • 2.Qxg8#
    • 1...dxe6
      • 2.Qxg7#
    • 1...d5
      • 2.Qxg7#
    • 1...d6
      • 2.Qxg7#
  • Tries
    • 1.Sf6?
      • 1...Qxf6
        • 2.Qg8#
      • 1...Qxc7
        • 2.Qe8#
        • 2.Qg8#
        • 2.Qf8#
      • 1...dxe6
        • 2.Qxg7#
      • 1...Qc8
        • 2.Rxc8#
      • 1...Qe7
        • 2.Qg8#
      • 1...Qe8
        • 2.Qxe8#
      • 1...Qf8
        • 2.Qxf8#
      • 1...Qg8
        • 2.Qxg8#
      • 1...Sg2
        • 2.Sg6#
      • 1...Sf3
        • 2.Sg6#
      • 1...Sf5
        • 2.Sg6#
      • 1...Sg6
        • 2.Sxg6#
      • 1...Sa6
        • 2.Rxd8#
      • 1...h5
        • 2.Qxh5#
      • 1...d5
        • 2.Qxg7#
      • 1...d6
        • 2.Qxg7#
      • 1...g5
        • 2.Qh7#
      • 1...g6
        • 2.Qh7#
      • 1...gxf6!
    • 1.Sf8?
      • threat
        • 2.Qg8#
      • 1...dxe6
        • 2.Qxg7#
      • 1...Qxf8!
  • Keys
    • 1.Sg5!
      • 1...Qxg5
        • 2.Qg8#
      • 1...Qxc7
        • 2.Qe8#
        • 2.Qg8#
        • 2.Qf8#
      • 1...hxg5
        • 2.Qh5#
      • 1...dxe6
        • 2.Qxg7#
      • 1...Qc8
        • 2.Rxc8#
      • 1...Qf6
        • 2.Qg8#
      • 1...Qe7
        • 2.Qg8#
      • 1...Qe8
        • 2.Qxe8#
      • 1...Qf8
        • 2.Qxf8#
      • 1...Qg8
        • 2.Qxg8#
      • 1...Sg2
        • 2.Sg6#
      • 1...Sf3
        • 2.Sg6#
      • 1...Sf5
        • 2.Sg6#
      • 1...Sg6
        • 2.Sxg6#
      • 1...Sa6
        • 2.Rxd8#
      • 1...h5
        • 2.Qxh5#
      • 1...d5
        • 2.Qxg7#
      • 1...d6
        • 2.Qxg7#
      • 1...g6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • Q(g);N_GUARD,P_SPINS(f)::QAR1(F)
    • Q(g);N_GUARD,P_SPINS(f),XR(E)::QAR1(F)
    • Q(g);N_GUARD::QAR1(F),XQ(g)
    • P(d);XB(D)::QAB1(F),XP(e)
    • P(d);::QAB1(F),XP(e)
  • Tries
    • Try
      • S(G);
      • Vars
        • Q(g);N_GUARD,P_SPINS(f),XS(G)::QAR1(F)
        • P(d);XB(D)::QAB1(F),XP(e)
        • Q(g);OGATEB::R(E),XQ(g)
        • Q(g);N_GUARD,P_SPINS(f)::QAR1(F)
        • Q(g);N_GUARD::QAR(F),XQ(g)
        • Q(g);N_GUARD::QAR2(F),XQ(g)
        • Q(g);N_GUARD::QAR1(F),XQ(g)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
        • S(f);OGATE,P_SPINQ(g)::R(H),XQ(g)
        • P(c);OGATEB::QAR(F),XP(c)
        • P(d);::QAB1(F),XP(e)
        • P(e);OGATE::QAR1(F)
      • Refutation
        • P(e);XS(G)
    • Try
      • S(G);
      • Threat
        • QAR1(F)
      • Vars
        • P(d);XB(D)::QAB1(F),XP(e)
      • Refutation
        • Q(g);XS(G)
  • Actual
    • S(G);
    • Vars
      • Q(g);N_GUARD,P_SPINS(f),XS(G)::QAR1(F)
      • P(c);OGATEB,XS(G)::QAR(F)
      • P(d);XB(D)::QAB1(F),XP(e)
      • Q(g);OGATEB::R(E),XQ(g)
      • Q(g);N_GUARD,P_SPINS(f)::QAR1(F)
      • Q(g);N_GUARD::QAR(F),XQ(g)
      • Q(g);N_GUARD::QAR2(F),XQ(g)
      • Q(g);N_GUARD::QAR1(F),XQ(g)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • S(f);OGATE,P_SPINQ(g)::R(H),XQ(g)
      • P(c);OGATEB::QAR(F),XP(c)
      • P(d);::QAB1(F),XP(e)
      • P(e);OGATE::QAR1(F)
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