MESON Chess Problem Database

Problem Display
PID: 241969 (1Q6/3k1K2/5p2/8/1N6/5N2/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

1Q6/3k1K2/5p2/8/1N6/5N2/8/8

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Se5#
  • Tries
    • 1.Sa2?
      • 1...f5
        • 2.Se5#
      • 1...Kc6!
    • 1.Sc2?
      • 1...f5
        • 2.Se5#
      • 1...Kc6!
    • 1.Sd3?
      • 1...f5
        • 2.Sde5#
        • 2.Sfe5#
      • 1...Kc6!
    • 1.Sc6?
      • 1...f5
        • 2.Sfe5#
        • 2.Sce5#
      • 1...Kxc6!
    • 1.Qc8+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxc8!
    • 1.Qe8+?
      • 1...Kd6
        • 2.Qc6#
        • 2.Qe7#
      • 1...Kc7!
  • Keys
    • 1.Qb7+!
      • 1...Kd6
        • 2.Qc6#
        • 2.Qe7#
      • 1...Kd8
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(a);N_GUARD::S(A)
  • Tries
    • Try
      • S(B);
      • Vars
        • P(a);N_GUARD::S(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • P(a);N_GUARD::S(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);
      • Refutation
        • K(b);S_FLIGHT,XS(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);CHECK
    • Vars
      • K(b);P-FLIGHT::S(B)
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