MESON Chess Problem Database

Problem Display
PID: 227343 (B4Q2/8/8/8/3k4/2N5/2K5/8 w - - 0 1)

Grupen, Claus

Kieler Schachgesellschaft, 1984

B4Q2/8/8/8/3k4/2N5/2K5/8

#2

4 + 1

16882 KSG-Problemschach 1969-1987 (Muck/Laue) 1993
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sd5?
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Ke5!
    • 1.Qd6+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qc5#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke5
        • 2.Qf6#

Anticipated by 222908(1926), 227921(1926), 30940(1937), 214872(1975)

This anticipates 137118(1992), 245851(2002)

FEATURES

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