MESON Chess Problem Database

Problem Display
PID: 241784 (6Q1/3k4/1K1P4/8/3N4/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1929

6Q1/3k4/1K1P4/8/3N4/8/8/8

#2

4 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qe6#
  • Tries
    • 1.Qf7+?
      • 1...Kxd6
        • 2.Qe6#
      • 1...Kc8
        • 2.Qe8#
        • 2.Qc7#
      • 1...Kd8!
    • 1.Qg6?
      • 1...Kc8
        • 2.Qe8#
      • 1...Kd8!
    • 1.Qc8+?
      • 1...Kxd6
        • 2.Qe6#
      • 1...Kxc8!
    • 1.Qe8+?
      • 1...Kxd6
        • 2.Qe6#
      • 1...Kxe8!
  • Keys
    • 1.Qe6+!
      • 1...Kd8
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT,XP(C)::QAR1(D)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT,XP(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
  • Actual
    • Q(D);CHECK
    • Vars
      • K(a);P-FLIGHT::S(A)
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