MESON Chess Problem Database

Problem Display
PID: 10017 (6RK/5kpp/5PrQ/b4P2/4N1p1/8/8/8 w - - 0 1)

Hjelle, David

Problem (Zagreb), 1961

6RK/5kpp/5PrQ/b4P2/4N1p1/8/8/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Sxg5#
      • 2.Sd6#
    • 1...Rxf6
      • 2.Qxg7#
    • 1...gxf6
      • 2.Qf8#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qa2#
        • 2.Qd5#
        • 2.Qd7#
      • 1...Rxf6
        • 2.Qd7#
      • 1...gxf6
        • 2.Qd7#
      • 1...Bb4
        • 2.Qa2#
        • 2.Qd5#
      • 1...Bd8
        • 2.Qa2#
        • 2.Qd5#
      • 1...Bxd2!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qb3#
      • 1...Rxf6
        • 2.Sg5#
      • 1...gxf6
        • 2.Sd6#
      • 1...Bc3
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,XP(C)::QAR1(D),XP(e)
    • P(e);OGATE,XP(C)::QAR1(D)
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(3)
      • Vars
        • R(c);XP(C)::QAR2(D)
        • P(e);XP(C)::QAR2(D)
      • Refutation
        • B(b);XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)
    • Vars
      • R(c);N_GUARD,SBLOCK,XP(C)::S(A)
      • P(e);SBLOCK,XP(C)::S(A)
      • B(b);N_GUARD::QAR(D)
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