MESON Chess Problem Database

Problem Display
PID: 227921 (1KN5/1N6/2k5/8/8/8/4Q3/8 w - - 0 1)

Langweil, Walter

Sudetendeutsche Schachblatter, 1926

1KN5/1N6/2k5/8/8/8/4Q3/8

#2

4 + 1

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sa5+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd7
        • 2.Qe7#
      • 1...Kd5!
    • 1.Sbd6?
      • threat
        • 2.Qb5#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd7
        • 2.Qe8#
      • 1...Kd5!
    • 1.Qe4+?
      • 1...Kd7
        • 2.Sb6#
      • 1...Kb5!
  • Keys
    • 1.Scd6!
      • threat
        • 2.Qb5#
      • 1...Kd5
        • 2.Qe4#
      • 1...Kb6
        • 2.Qb5#
      • 1...Kd7
        • 2.Qe8#

Anticipated by 222908(1926)

This anticipates 214872(1975), 227343(1984), 137118(1992), 245851(2002)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
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