MESON Chess Problem Database

Problem Display
PID: 186051 (8/8/4Q3/4K3/8/2N2kp1/5pp1/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2017

8/8/4Q3/4K3/8/2N2kp1/5pp1/8

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Kd4?
      • threat
        • 2.Qf5#
        • 2.Qe4#
      • 1...f1Q
        • 2.Qf5#
      • 1...f1S
        • 2.Qf5#
      • 1...f1B
        • 2.Qf5#
      • 1...f1R
        • 2.Qf5#
      • 1...g1Q
        • 2.Qe4#
      • 1...g1S
        • 2.Qe4#
      • 1...g1B
        • 2.Qe4#
      • 1...g1R
        • 2.Qe4#
      • 1...Kf4!
    • 1.Qg4+?
      • 1...Ke3
        • 2.Qe2#
      • 1...Kxg4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qe2#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Ke3
        • 2.Qe2#
      • 1...f1Q
        • 2.Qf4#
      • 1...f1S
        • 2.Qe2#
        • 2.Qf4#
      • 1...f1B
        • 2.Qf4#
      • 1...f1R
        • 2.Qe2#
        • 2.Qf4#
      • 1...g1Q
        • 2.Qe4#
      • 1...g1S
        • 2.Qe4#
      • 1...g1B
        • 2.Qe4#
      • 1...g1R
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR2(C)
        • P(b);::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • DUALS(3)
    • Vars
      • K(c);P-FLIGHT::QAR1(C)
      • P(a);::QAR1(C)
      • P(b);::QAB1(C)
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