MESON Chess Problem Database

Problem Display
PID: 273900 (1n6/5K2/8/3k4/5Q2/8/6P1/2R1N3 w - - 0 1)

Lokker, Miklosh S

Mat, 1972

1n6/5K2/8/3k4/5Q2/8/6P1/2R1N3

#2

5 + 2

5454 Near Snap 2024

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qe5#
        • 2.Qd4#
      • 1...Sd7
        • 2.Qd4#
      • 1...Sc6!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Qe6#
        • 2.Qd4#
      • 1...Ke5!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qd4#
        • 2.Qe6#
      • 1...Kxe4!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Kd4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb4#
        • 2.Rc5#
        • 2.Qe5#
      • 1...Sa6
        • 2.Qe5#
      • 1...Sc6
        • 2.Rc5#
      • 1...Sd7
        • 2.Sb4#

This anticipates 15218(1981), 271334(1985)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(D)
      • Refutation
        • S(b);
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • DUALS(3)
    • Vars
      • S(b);::QAR1(D)
      • S(b);::R1(A)
      • S(b);::S(B)
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