MESON Chess Problem Database

Problem Display
PID: 241977 (5R2/8/5Pk1/3K4/7Q/6P1/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

5R2/8/5Pk1/3K4/7Q/6P1/8/8

#2

5 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qh5#
  • Tries
    • 1.Rf7?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kxf7!
    • 1.Rg8+?
      • 1...Kf5
        • 2.Qg5#
        • 2.Qf4#
      • 1...Kf7!
    • 1.Qg5+?
      • 1...Kh7
        • 2.Qh5#
        • 2.Qg7#
      • 1...Kxg5!
    • 1.Qh1?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kg5!
    • 1.Qh2?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kg5!
    • 1.Qh6+?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kxh6!
    • 1.Qh8?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kg5!
  • Keys
    • 1.Qg4+!
      • 1...Kh6
        • 2.Rh8#
      • 1...Kh7
        • 2.Qh5#
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • R(E);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);P-FLIGHT::R(E)
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