MESON Chess Problem Database

Problem Display
PID: 234781 (k7/8/PK1B4/3b3r/8/8/8/6Q1 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2016

k7/8/PK1B4/3b3r/8/8/8/6Q1

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Qg8#
    • 1...Bf3
      • 2.Qg8#
    • 1...Be4
      • 2.Qg8#
    • 1...Bb7
      • 2.axb7#
    • 1...Bg8
      • 2.Qxg8#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Qf8#
        • 2.Qa7#
      • 1...Re5
        • 2.Qa7#
      • 1...Rf5
        • 2.Qa7#
      • 1...Rh7
        • 2.Qf8#
      • 1...Rh8
        • 2.Qa7#
      • 1...Bc6
        • 2.Qa7#
      • 1...Be6
        • 2.Qa7#
        • 2.Qb7#
      • 1...Bb7
        • 2.Qxb7#
        • 2.axb7#
      • 1...Bf7!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qc8#
      • 1...Rh8
        • 2.Qxd5#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Be6
        • 2.Qc6#
      • 1...Bb7
        • 2.axb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAR(A)
    • B(a);OGATE::P(B),XB(a)
    • B(a);N_GUARD::QAR(A),XB(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(A)
        • R(b);SBLOCK::QAR(A)
        • R(b);SBLOCK::QAR1(A)
        • B(a);::QAR1(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • R(b);N_GUARD,SBLOCK::QAB(A),XB(a)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);N_GUARD::QAB(A)
      • B(a);OGATE::P(B),XB(a)
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