MESON Chess Problem Database

Problem Display
PID: 241797 (8/6p1/6P1/6Q1/6p1/6k1/8/5KN1 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1929

8/6p1/6P1/6Q1/6p1/6k1/8/5KN1

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kh2
      • 2.Qh4#
  • Tries
    • 1.Sf3?
      • 1...Kh3
        • 2.Qh4#
      • 1...Kxf3!
    • 1.Qf6?
      • threat
        • 2.Qf2#
      • 1...Kh2
        • 2.Qh4#
      • 1...gxf6!
    • 1.Qe7?
      • 1...Kh2
        • 2.Qh4#
      • 1...Kf4!
    • 1.Qd8?
      • 1...Kh2
        • 2.Qh4#
      • 1...Kf4!
    • 1.Qxg4+?
      • 1...Kh2
        • 2.Qh3#
        • 2.Qg2#
        • 2.Qh4#
      • 1...Kxg4!
  • Keys
    • 1.Se2+!
      • 1...Kh2
        • 2.Qh4#
        • 2.Qh5#
      • 1...Kf3
        • 2.Qf4#
      • 1...Kh3
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::QAR2(C)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XS(B)
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
  • Actual
    • S(B);CHECK
    • Vars
      • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
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