MESON Chess Problem Database

Problem Display
PID: 241377 (1qBb1r1n/1p3PRN/4N1n1/5k1p/Q6p/8/4R3/1b3K2 w - - 0 1)

Hjelle, David

Norsk Sjakkblad, 1934

1qBb1r1n/1p3PRN/4N1n1/5k1p/Q6p/8/4R3/1b3K2

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Sf4#
      • 2.Sc5#
      • 2.Seg5#
      • 2.Sc7#
      • 2.Sxd8#
      • 2.Sexf8#
    • 1...Qg3
      • 2.Sf4#
      • 2.Sc5#
      • 2.Seg5#
      • 2.Sc7#
      • 2.Sxd8#
      • 2.Sexf8#
    • 1...Qf4+
      • 2.Sxf4#
    • 1...Qa7
      • 2.Sf4#
      • 2.Sc5#
      • 2.Seg5#
      • 2.Sc7#
      • 2.Sxd8#
      • 2.Sexf8#
    • 1...Qc7
      • 2.Sxc7#
    • 1...Ba2
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sf4
      • 2.Sd4#
    • 1...Se5
      • 2.Qf4#
    • 1...Se7
      • 2.Rg5#
  • Tries
    • 1.Qf4+?
      • 1...Sxf4
        • 2.Sd4#
      • 1...Qxf4+!
  • Keys
    • 1.Rg8!
      • threat
        • 2.Sg7#
      • 1...Qf4+
        • 2.Sxf4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sf4
        • 2.Sd4#
      • 1...Se5
        • 2.Qf4#
      • 1...Se7
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(g);CHECK,N_GUARD::B(H)+S(D),XQ(g)
    • Q(g);N_GUARD::B(H)+S(D),XQ(g)
    • B(a);N_GUARD::QAB1(C)
    • B(a);N_GUARD::QAB1(C),XB(a)
    • S(e);SBLOCK::B(H)+S(D),DCHECK
    • S(e);N_GUARD,S_CUTQ(g)::QAR1(C)
    • S(e);OGATE::R1(F)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(e);SBLOCK,XQ(C)::B(H)+S(D),DCHECK
      • Refutation
        • Q(g);CHECK,XQ(C)
  • Actual
    • R(F);
    • Threat
      • B(H)+S(D),DCHECK
    • Vars
      • Q(g);CHECK,N_GUARD::B(H)+S(D),XQ(g)
      • B(a);N_GUARD::QAB1(C),XB(a)
      • S(e);SBLOCK::B(H)+S(D),DCHECK
      • S(e);N_GUARD,S_CUTQ(g)::QAR1(C)
      • S(e);OGATE::R1(F)
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Developed and maintained by Brian Stephenson.
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