MESON Chess Problem Database

Problem Display
PID: 224782 (Q1q1n1Bk/3PN3/6P1/2p3n1/8/8/8/2K5 w - - 0 1)

Mosely, Arthur James

Mosley, GW

Leeds Mercury Weekly Supplement, 1882

(First published on Sat Aug 19 1882)

Q1q1n1Bk/3PN3/6P1/2p3n1/8/8/8/2K5

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Qa1#
    • 1...Sc7
      • 2.Qa1#
  • Tries
    • 1.Qa1+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sg7!
  • Keys
    • 1.dxe8S!
      • threat
        • 2.Qa1#
        • 2.g7#
      • 1...Qxa8
        • 2.g7#
      • 1...Qxe8
        • 2.Qa1#
      • 1...Sf3
        • 2.g7#
      • 1...Qh3
        • 2.g7#
      • 1...Qg4
        • 2.g7#
      • 1...Qf5
        • 2.g7#
      • 1...Qa6
        • 2.g7#
      • 1...Qe6
        • 2.g7#
      • 1...Qb7
        • 2.g7#
      • 1...Qd7
        • 2.g7#
      • 1...Qc6
        • 2.g7#
      • 1...Qc7
        • 2.g7#
      • 1...Qb8
        • 2.g7#
      • 1...Qd8
        • 2.g7#
      • 1...Se4
        • 2.g7#
      • 1...Se6
        • 2.Qh1#
      • 1...Sf7
        • 2.g7#
      • 1...Sh7
        • 2.g7#
      • 1...c4
        • 2.g7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 19
    • REMOVED MATES = 2
  • Sets
    • S(d);N_GUARD::QAB(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB(E),XS(d)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • P(C);XS(d)
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);SBLOCK,XQ(E)::P(B)
      • Q(c);XS(C)::QAB(E)
      • S(b);::P(B)
      • Q(c);::P(B)
      • S(b);N_GUARD,S_CUTQ(c)::QAB(E)
      • P(a);::P(B)
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