MESON Chess Problem Database

Problem Display
PID: 234766 (kb3R2/8/2K2n1Q/8/3p4/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2015

kb3R2/8/2K2n1Q/8/3p4/8/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qa3#
        • 2.Qa1#
      • 1...Ka7
        • 2.Qa3#
        • 2.Qa1#
      • 1...Se8!
    • 1.Qd2?
      • threat
        • 2.Qa5#
        • 2.Qa2#
      • 1...Ka7
        • 2.Qa5#
        • 2.Qa2#
      • 1...Se8!
    • 1.Qh2?
      • threat
        • 2.Qxb8#
        • 2.Qa2#
      • 1...Ka7
        • 2.Qa2#
      • 1...Sd7
        • 2.Qa2#
      • 1...Se8!
    • 1.Qxf6?
      • 1...d3
        • 2.Qa1#
      • 1...Ka7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qa1#
      • 1...Ka7
        • 2.Qa1#
      • 1...Se8
        • 2.Kb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);N_SPINB(d)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);N_SPINB(d)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINB(d),P-FLIGHT::QAR(B)
        • S(b);::QAR(B)
      • Refutation
        • S(b);N_SPINB(d)
    • Try
      • Q(B);XS(b)
      • Vars
        • P(a);OGATE::QAB(B)
      • Refutation
        • K(c);N_SPINB(d),P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • K(c);N_SPINB(d),P-FLIGHT::QAR(B)
      • S(b);N_GUARD,N_SPINB(d)::QAB(B)+K(A)
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