MESON Chess Problem Database

Problem Display
PID: 238331 (8/8/1P6/3kbQ2/1K1N4/5P2/8/8 w - - 0 1)

Segers, Marcel

Magyar Sakkvilag, 1935

8/8/1P6/3kbQ2/1K1N4/5P2/8/8

#2

5 + 2

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qe4#
    • 1...Kd6
      • 2.Qe6#
  • Tries
    • 1.Kb5?
      • 1...Kd6
        • 2.Qe6#
      • 1...Kxd4!
    • 1.Qf7+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Kxd4!
    • 1.f4?
      • threat
        • 2.Qxe5#
      • 1...Kd6
        • 2.Qe6#
      • 1...Kxd4!
    • 1.b7?
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kd6!
  • Keys
    • 1.Qg5!
      • 1...Kxd4
        • 2.Qd2#
      • 1...Kd6
        • 2.Qd8#

Anticipated by 193695(1915)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),P-FLIGHT,XS(C)::QAR1(D)
    • K(a);N_SPINB(b),P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT,XS(C)
    • Try
      • Q(D);CHECK,N_PINB(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • P(A);
      • Threat
        • QAR1(D),XB(b)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT,XS(C)
    • Try
      • P(E);
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);N_SPINB(b),OGATEB,P-FLIGHT,XS(C)::QAR2(D)
      • K(a);N_SPINB(b),P-FLIGHT::QAR2(D)
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