MESON Chess Problem Database

Problem Display
PID: 234785 (k1K5/P7/n7/1N1p4/6Q1/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2016

k1K5/P7/n7/1N1p4/6Q1/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb8
      • 2.axb8Q#
      • 2.axb8R#
    • 1...d4
      • 2.Qf3#
      • 2.Qg2#
      • 2.Qe4#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qc6#
        • 2.Qxd5#
        • 2.Qb7#
      • 1...Sb4
        • 2.Qb7#
      • 1...Sc7
        • 2.Qc6#
      • 1...Sb8
        • 2.Qb7#
        • 2.axb8Q#
        • 2.axb8R#
      • 1...d4
        • 2.Qc6#
        • 2.Qd5#
        • 2.Qb7#
      • 1...Sc5!
    • 1.Qg1?
      • 1...Sb4
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Sb8
        • 2.Sc7#
        • 2.axb8Q#
        • 2.axb8R#
      • 1...d4
        • 2.Qh1#
        • 2.Qg2#
      • 1...Sc5!
    • 1.Qg3?
      • 1...Sb4
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
        • 2.axb8Q#
        • 2.axb8R#
      • 1...d4
        • 2.Qg2#
        • 2.Qf3#
      • 1...Sc7!
    • 1.Qa4?
      • 1...Sb4
        • 2.Sc7#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Sb8
        • 2.Sc7#
        • 2.axb8Q#
        • 2.axb8S#
        • 2.axb8B#
        • 2.axb8R#
      • 1...d4!
    • 1.Qd4?
      • threat
        • 2.Qxd5#
      • 1...Sb4
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Sb8
        • 2.Sc7#
        • 2.axb8Q#
        • 2.axb8R#
      • 1...Sc5!
    • 1.Qf4?
      • 1...Sb4
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
        • 2.axb8Q#
        • 2.axb8R#
      • 1...d4
        • 2.Qf3#
        • 2.Qe4#
      • 1...Sc7!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qxd5#
      • 1...Sb4
        • 2.Kc7#
      • 1...Sc5
        • 2.Kc7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...Sb8
        • 2.axb8Q#
        • 2.axb8R#
      • 1...d4
        • 2.Qd5#
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::PXS(b)=Q
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAB1(A)
        • S(b);::QAB(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::S(B)
        • S(b);N_GUARD::S(B),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::S(B)
        • S(b);N_GUARD::S(B),XS(b)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(a)
      • Vars
        • S(b);N_GUARD::S(B)
        • S(b);N_GUARD::S(B),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XP(a)
    • Vars
      • S(b);::QAR(A)+K(D)
      • S(b);::QAR(A)+K(D),XS(b)
      • S(b);OGATE::PXS(b)=Q
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