MESON Chess Problem Database

Problem Display
PID: 241966 (4N3/1Q6/8/r1k2p2/8/2NK4/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

4N3/1Q6/8/r1k2p2/8/2NK4/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb5#
    • 1...Ra2
      • 2.Qb5#
    • 1...Ra3
      • 2.Qb5#
    • 1...Ra4
      • 2.Sxa4#
      • 2.Qb5#
    • 1...Rb5
      • 2.Qxb5#
    • 1...Ra6
      • 2.Qb5#
    • 1...Ra7
      • 2.Qb5#
    • 1...Ra8
      • 2.Qb5#
    • 1...f4
      • 2.Se4#
  • Tries
    • 1.Qe7+?
      • 1...Kc6
        • 2.Qc7#
      • 1...Kb6!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qd6#
      • 1...Kc6
        • 2.Qc7#
      • 1...Ra6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::QAR1(C)
    • R(a);N_GUARD,P_PINS(A)::QAR1(C)
    • R(a);N_GUARD::QAR1(C),XR(a)
    • P(c);N_GUARD::S(A)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • R(a);N_GUARD::QAR1(C)
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