MESON Chess Problem Database

Problem Display
PID: 162810 (1K6/8/k7/1p3Q2/8/5p2/8/6B1 w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 2016

1K6/8/k7/1p3Q2/8/5p2/8/6B1

#2

3 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qa3#
      • 1...Ka5
        • 2.Qa3#
      • 1...f2!
    • 1.Qd7?
      • threat
        • 2.Qa7#
      • 1...b4
        • 2.Qa4#
      • 1...Ka5!
    • 1.Qxf3?
      • threat
        • 2.Qa8#
        • 2.Qa3#
      • 1...Ka5
        • 2.Qa3#
      • 1...b4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qa3#
        • 2.Qb6#
        • 2.Qa7#
      • 1...Ka5
        • 2.Qa3#
      • 1...f2
        • 2.Qa7#
      • 1...b4
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • QAR(B)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);OGATE::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
  • Actual
    • Q(B);
    • Threat
      • DUALS(3)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b)::QAR2(B)
      • P(a);::QAR1(B)
      • P(b);::QAR1(B)
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