MESON Chess Problem Database

Problem Display
PID: 231586 (8/7N/5Np1/2K1kPQ1/8/8/8/8 w - - 0 1)

Zilahi, Zoltan

Magyar Sakkvilag, 1927

8/7N/5Np1/2K1kPQ1/8/8/8/8

#2

5 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...gxf5
      • 2.Qe3#
  • Tries
    • 1.Kc6?
      • 1...gxf5
        • 2.Qe3#
      • 1...Kd4!
    • 1.Sd5?
      • threat
        • 2.Qf4#
      • 1...gxf5
        • 2.Qe3#
        • 2.Qe7#
      • 1...Ke4!
    • 1.Se8?
      • 1...gxf5
        • 2.Qe3#
      • 1...Ke4!
    • 1.Sg8?
      • 1...gxf5
        • 2.Qe3#
      • 1...Ke4!
    • 1.Qh4?
      • threat
        • 2.Qe4#
      • 1...Kxf5
        • 2.Qe4#
      • 1...gxf5!
  • Keys
    • 1.Qe3+!
      • 1...Kxf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(b);P_SPINP(b),SBLOCK,XP(B)::QAR2(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);P_SPINP(b),SBLOCK,XP(B)::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • P(b);P_SPINP(b),SBLOCK,XP(B)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • P(b);P_SPINP(b),SBLOCK,XP(B)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAB1(C)
      • Refutation
        • P(b);XP(B)
  • Actual
    • Q(C);CHECK
    • Vars
      • K(a);P-FLIGHT,XP(B)::QAB1(C)
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