MESON Chess Problem Database

Problem Display
PID: 38291 (8/8/kr6/1NB5/8/KN1Q4/8/8 w - - 0 1)

Hermanson, Halvar

1st Prize, Dagbladet, 1957

8/8/kr6/1NB5/8/KN1Q4/8/8

#2

5 + 2

2012 Miniature Chess Problems from Many Countries 1981
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sd6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Re6
      • 2.Sd6#
    • 1...Rf6
      • 2.Sd6#
    • 1...Rg6
      • 2.Sd6#
    • 1...Rh6
      • 2.Sd6#
    • 1...Rb7
      • 2.Sc7#
  • Tries
    • 1.Sd6+?
      • 1...Rb5
        • 2.Qxb5#
      • 1...Ka7!
  • Keys
    • 1.Qe4!
      • 1...Kxb5
        • 2.Qa4#
      • 1...Rxb5
        • 2.Qa8#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rd6
        • 2.Sc7#
      • 1...Re6
        • 2.Sc7#
      • 1...Rf6
        • 2.Sc7#
      • 1...Rg6
        • 2.Sc7#
      • 1...Rh6
        • 2.Sc7#
      • 1...Rb7
        • 2.Qa4#
      • 1...Rb8
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::QAB(C)+S(D)
    • R(b);N_GUARD::QAB(C)+S(D),XR(b)
    • R(b);N_GUARD,SBLOCK::QAB(C)+S(D)
    • R(b);SBLOCK::QAB(C)+S(D),DCHECK
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(b)
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT,XS(D)::QAB1(C)
      • R(b);SBLOCK,XS(D)::QAR2(C)
      • R(b);OGATEB::QAR2(C),XR(b)
      • R(b);::S(D)
      • R(b);SBLOCK::S(D)
      • R(b);SBLOCK::QAR2(C)
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