MESON Chess Problem Database

Problem Display
PID: 227856 (8/8/3P4/QK1k2N1/3P1P2/8/8/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1926

8/8/3P4/QK1k2N1/3P1P2/8/8/8

#2

6 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qd2#
    • 1...Kxd6
      • 2.Qd8#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qd2#
      • 1...Kxd6!
    • 1.Qa2+?
      • 1...Kxd4
        • 2.Qd2#
      • 1...Kxd6!
    • 1.Qa8+?
      • 1...Kxd6
        • 2.Qd8#
      • 1...Kxd4!
    • 1.f5?
      • 1...Kxd6
        • 2.Qd8#
      • 1...Kxd4!
  • Keys
    • 1.d7!
      • threat
        • 2.d8Q#
        • 2.d8R#
      • 1...Kxd4
        • 2.Qd2#
      • 1...Kd6
        • 2.d8Q#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(A)::QAR2(C)
    • K(a);OGATEB,P-FLIGHT,XP(F)::QAR2(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(A)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XP(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(A)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XP(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(F)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XP(A)
    • Try
      • P(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(F)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XP(A)
  • Actual
    • P(F);
    • Threat
      • P=Q
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(A)::QAR2(C)
      • K(a);P-FLIGHT::P=Q
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