MESON Chess Problem Database

Problem Display
PID: 234764 (k1K5/b7/2R5/Q1n5/1p6/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2015

k1K5/b7/2R5/Q1n5/1p6/8/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rb6?
      • threat
        • 2.Rb8#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sb7!
    • 1.Rc7?
      • threat
        • 2.Rxa7#
        • 2.Qxa7#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sb7!
    • 1.Qxb4?
      • 1...Bb8
        • 2.Qxb8#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sb3
        • 2.Qb7#
      • 1...Sd3
        • 2.Qb7#
      • 1...Sa4
        • 2.Qb7#
      • 1...Se4
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Sd7
        • 2.Qb7#
      • 1...Bb6!
    • 1.Qc7?
      • 1...Bb6
        • 2.Qb8#
      • 1...Bb8
        • 2.Qxb8#
      • 1...Sb3
        • 2.Qb7#
      • 1...Sd3
        • 2.Qb7#
      • 1...Sa4
        • 2.Qb7#
      • 1...Se4
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sd7
        • 2.Qb7#
      • 1...b3!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Rxa7#
      • 1...Sxa6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • S(b);N_SPINB(c),OGATE::QAB(A)
        • S(b);OGATE::QAB(A)
      • Refutation
        • S(b);
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_SPINB(c),OGATE::QAB(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);N_PINB(c),XP(a)
      • Vars
        • B(c);N_GUARD::QAR1(A),XB(c)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • B(c);
    • Try
      • Q(A);N_PINB(c)
      • Vars
        • B(c);N_GUARD::QAR1(A)
        • B(c);N_GUARD::QAR1(A),XB(c)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • P(a);
  • Actual
    • R(B);
    • Threat
      • R1(B),XB(c)
    • Vars
      • S(b);N_SPINB(c),OGATE,XR(B)::QAB(A)
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