MESON Chess Problem Database

Problem Display
PID: 231101 (8/8/8/8/8/1kN1p3/4Q3/KN6 w - - 0 1)

Onitiu, Valerian

Magyar Sakkvilag, 1927

8/8/8/8/8/1kN1p3/4Q3/KN6

#2

4 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qb5#
  • Tries
    • 1.Qf1?
      • 1...Kc2
        • 2.Qd1#
      • 1...Kb4
        • 2.Qb5#
      • 1...e2!
    • 1.Qd3?
      • 1...Kb4
        • 2.Qb5#
      • 1...e2!
    • 1.Qa6?
      • threat
        • 2.Qa4#
      • 1...Kb4
        • 2.Qb5#
      • 1...Kc2!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qa4#
      • 1...Kc2
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR1(C)
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
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