MESON Chess Problem Database

Problem Display
PID: 241726 (N7/p7/8/8/QpkBK3/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1928

N7/p7/8/8/QpkBK3/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
  • Tries
    • 1.Ke3?
      • 1...a5
        • 2.Sb6#
      • 1...a6
        • 2.Sb6#
      • 1...Kd5!
    • 1.Qd7?
      • threat
        • 2.Qd5#
      • 1...b3
        • 2.Qa4#
      • 1...Kb3!
    • 1.Qa2+?
      • 1...b3
        • 2.Qa4#
      • 1...Kb5!
    • 1.Qa5?
      • threat
        • 2.Qd5#
      • 1...b3
        • 2.Qa4#
        • 2.Qc5#
      • 1...Kb3!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • P(c);N_GUARD::S(D)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);N_GUARD::S(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAB1(A)
      • Vars
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • P(a);OGATEB,P_SPINP(a)::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAR2(A)
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