MESON Chess Problem Database

Problem Display
PID: 231439 (8/8/6N1/4p3/2QNk3/8/4K3/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1927

8/8/6N1/4p3/2QNk3/8/4K3/8

#2

4 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Qe6#
  • Tries
    • 1.Qa2?
      • 1...exd4
        • 2.Qe6#
      • 1...Kxd4!
    • 1.Qb3?
      • 1...exd4
        • 2.Qe6#
        • 2.Qf3#
      • 1...Kxd4!
    • 1.Qb5?
      • threat
        • 2.Qxe5#
      • 1...exd4
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Qf7?
      • 1...exd4
        • 2.Qe6#
        • 2.Qf3#
      • 1...Kxd4!
    • 1.Qg8?
      • 1...exd4
        • 2.Qe6#
      • 1...Kxd4!
    • 1.Qc3?
      • 1...exd4
        • 2.Qf3#
      • 1...Kd5!
  • Keys
    • 1.Qc5!
      • 1...exd4
        • 2.Qe5#

FEATURES

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