MESON Chess Problem Database

Problem Display
PID: 248946 (5N2/r2p1p2/8/1Bpk4/6Qn/1p6/1n2K2B/8 w - - 0 1)

Blikeng, Bjarne

Thema Danicum, 1985

5N2/r2p1p2/8/1Bpk4/6Qn/1p6/1n2K2B/8

#2

5 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
  • Tries
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Sxf5!
    • 1.Qxd7+?
      • 1...Ke4
        • 2.Bc6#
      • 1...Rxd7!
  • Keys
    • 1.Ke3!
      • threat
        • 2.Qe4#
      • 1...Sd1+
        • 2.Qxd1#
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sg2+
        • 2.Qxg2#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...c4
        • 2.Qd4#
      • 1...Ra4
        • 2.Qxd7#
      • 1...f5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(C)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);CHECK,XP(g)
      • Vars
        • K(e);S_FLIGHT::B(D)
      • Refutation
        • R(f);XQ(C)
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAB1(C)
    • Vars
      • S(a);CHECK,N_GUARD::QAR(C),XS(a)
      • S(a);CHECK,N_GUARD::QAB1(C),XS(a)
      • S(c);CHECK,N_GUARD::QAB(C),XS(c)
      • S(c);CHECK,N_GUARD::QAR2(C),XS(c)
      • P(d);N_GUARD::QAR1(C)
      • R(f);N_GUARD::QAR2(C),XP(g)
      • P(h);OGATEB::QAB(C)
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