MESON Chess Problem Database

Problem Display
PID: 234771 (k1K1R3/6Q1/n7/2n5/3N4/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2015

k1K1R3/6Q1/n7/2n5/3N4/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qb7#
    • 1...Sd3
      • 2.Qb7#
    • 1...Sa4
      • 2.Qb7#
    • 1...Se4
      • 2.Qb7#
    • 1...Se6
      • 2.Qb7#
    • 1...Sb7
      • 2.Qxb7#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Qa7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc7
        • 2.Kxc7#
      • 1...Sd7!
    • 1.Qc7?
      • 1...Sb7
        • 2.Qxb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Sb3
        • 2.Qb7#
      • 1...Sd3
        • 2.Qb7#
      • 1...Sa4
        • 2.Qb7#
      • 1...Se4
        • 2.Qb7#
      • 1...Sd7
        • 2.Qb7#
      • 1...Sb4
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
      • 1...Sxc7!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qa7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sd7
        • 2.Qg2#
      • 1...Sc7
        • 2.Kxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(B)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(b);::R(D)+K(C),XS(b)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
        • S(b);N_GUARD::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(b)
      • Refutation
        • S(b);XQ(B)
  • Actual
    • S(A);
    • Threat
      • QAR1(B)
    • Vars
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB(B)
      • S(b);::R(D)+K(C),XS(b)
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