MESON Chess Problem Database

Problem Display
PID: 234680 (2N2K2/3k4/PQ6/8/1P4P1/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2010

2N2K2/3k4/PQ6/8/1P4P1/8/8/8

#2

6 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5?
      • 1...Ke6
        • 2.Qd6#
        • 2.Qf5#
      • 1...Kd8!
    • 1.Qc7+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Kxc7!
    • 1.Qd8+?
      • 1...Kc6
        • 2.Sa7#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kxd8!
  • Keys
    • 1.Qb8!
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kd8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);P-FLIGHT::QAR(D)+S(E)
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