MESON Chess Problem Database

Problem Display
PID: 227982 (8/1p2K3/5P2/2p3R1/Q2qk2N/3bP3/1B4N1/8 w - - 0 1)

Laib, Kurt Friedrich

2nd Prize, Kieler Schachgesellschaft, 1970

8/1p2K3/5P2/2p3R1/Q2qk2N/3bP3/1B4N1/8

#2

8 + 5

16882 KSG-Problemschach 1969-1987 (Muck/Laue) 1993

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Re5#
    • 1...Qb4
      • 2.Re5#
    • 1...Qc4
      • 2.Re5#
  • Tries
    • 1.Qc6+?
      • 1...Qd5
        • 2.Rg4#
        • 2.Re5#
        • 2.Qxd5#
      • 1...bxc6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qg6#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Qxf6+
        • 2.Kxf6#
      • 1...Qd6+
        • 2.Kxd6#
      • 1...Qd7+
        • 2.Kxd7#
      • 1...Qd8+
        • 2.Kxd8#
      • 1...Qd5
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_SPINQ(b),XQ(D)::R1(F)
    • Q(b);::R1(F)
  • Tries
    • Try
      • Q(D);CHECK,N_PINQ(b)
      • Refutation
        • P(e);XQ(D)
  • Actual
    • Q(D);N_PINQ(b)
    • Threat
      • QAB(D)
    • Vars
      • Q(b);CHECK,N_GUARD::R1(F),XQ(b)
      • Q(b);CHECK,XP(G)::QAR(D)+K(H),XQ(b)
      • Q(b);CHECK::QAR(D)+K(H),XQ(b)
      • Q(b);SBLOCK::R(F)
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