MESON Chess Problem Database

Problem Display
PID: 264173 (8/8/2n5/1N5Q/K2Bkp1p/7q/3PP1P1/8 w - - 0 1)

Hermanson, Halvar

Tijdschrift vd KNSB, 1958

8/8/2n5/1N5Q/K2Bkp1p/7q/3PP1P1/8

#2

7 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2
      • 2.d3#
    • 1...Qg4
      • 2.d3#
    • 1...Qf5
      • 2.Qf3#
    • 1...Qe6
      • 2.d3#
    • 1...Qd7
      • 2.d3#
    • 1...Qc8
      • 2.d3#
    • 1...Qh1
      • 2.d3#
    • 1...Qh2
      • 2.d3#
    • 1...Qf3
      • 2.gxf3#
    • 1...Sb4
      • 2.Qe5#
    • 1...Sxd4
      • 2.Sd6#
    • 1...Sa5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sa7
      • 2.Qe5#
    • 1...Se7
      • 2.Qe5#
    • 1...Sb8
      • 2.Qe5#
    • 1...Sd8
      • 2.Qe5#
  • Tries
    • 1.Sc3+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Qxc3!
    • 1.g3?
      • threat
        • 2.d3#
      • 1...Sxd4
        • 2.Sc3#
        • 2.Sd6#
      • 1...fxg3
        • 2.Qf3#
      • 1...Qf5
        • 2.Qf3#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sb4
        • 2.Qe5#
      • 1...Qxg3!
  • Keys
    • 1.gxh3!
      • threat
        • 2.d3#
      • 1...Sxd4
        • 2.Sc3#
        • 2.Sd6#
      • 1...Se5
        • 2.Qxe5#
      • 1...f3
        • 2.Qxf3#
      • 1...Sb4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 15
  • Sets
    • Q(a);N_GUARD,XP(C)::P(A)
    • Q(a);N_GUARD::P(A)
    • Q(a);N_GUARD,SBLOCK::QAB1(G)
    • Q(a);OGATE::P(C),XQ(a)
    • S(e);N_GUARD::QAR1(G)
    • S(e);SBLOCK,XB(E)::S(F)
    • S(e);N_GUARD::QAR1(G),XS(e)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(E)::QAR1(G)
      • Refutation
        • Q(a);XS(F)
    • Try
      • P(C);
      • Threat
        • P(A)
      • Vars
        • P(c);XP(C)::QAB1(G)
        • Q(a);SBLOCK::QAB1(G)
        • S(e);N_GUARD::QAR1(G),XS(e)
        • S(e);N_GUARD::QAR1(G)
      • Refutation
        • Q(a);XP(C)
  • Actual
    • P(C);XQ(a)
    • Threat
      • P(A)
    • Vars
      • S(e);N_GUARD::QAR1(G),XS(e)
      • P(c);::QAB1(G),XP(c)
      • S(e);N_GUARD::QAR1(G)
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