MESON Chess Problem Database

Problem Display
PID: 99153 (k6r/1p1N4/1p1Kp3/1N6/6Q1/3p4/8/r6B w - - 0 1)

Groeneveld, Cornelis

Magyar Sakkelet, 1984

k6r/1p1N4/1p1Kp3/1N6/6Q1/3p4/8/r6B

#2

5 + 7

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qa4#
    • 1...Rc1
      • 2.Qa4#
    • 1...Rd1
      • 2.Qa4#
    • 1...Re1
      • 2.Qa4#
    • 1...Rf1
      • 2.Qa4#
    • 1...Rg1
      • 2.Qa4#
    • 1...Raxh1
      • 2.Qa4#
    • 1...Ra4
      • 2.Qxa4#
    • 1...Ra7
      • 2.Sc7#
    • 1...Rhxh1
      • 2.Qg8#
    • 1...Rh2
      • 2.Qg8#
    • 1...Rh3
      • 2.Qg8#
    • 1...Rh4
      • 2.Qg8#
    • 1...Rh5
      • 2.Qg8#
    • 1...Rh6
      • 2.Qg8#
    • 1...Rh7
      • 2.Qg8#
    • 1...Rb8
      • 2.Sxb6#
    • 1...Rg8
      • 2.Qxg8#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qxb7#
      • 1...Rhxh1
        • 2.Qf8#
      • 1...Ra7
        • 2.Sc7#
      • 1...Rb8
        • 2.Sxb6#
      • 1...Raxh1!
    • 1.Qe4?
      • threat
        • 2.Qxb7#
      • 1...Raxh1
        • 2.Qa4#
      • 1...Ra7
        • 2.Sc7#
      • 1...Rb8
        • 2.Sxb6#
      • 1...Rhxh1!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qxb7#
      • 1...Raxh1
        • 2.Qa2#
      • 1...Rhxh1
        • 2.Qg8#
      • 1...Ra7
        • 2.Sc7#
      • 1...Rb8
        • 2.Sxb6#

This anticipates 132990(1999)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 14
  • Sets
    • R(a);N_GUARD::QAR(B)
    • R(a);N_GUARD,N_SPINP(e),XB(A)::QAR(B)
    • R(a);N_GUARD::QAR(B),XR(a)
    • R(a);SBLOCK::S(C)
    • R(g);N_GUARD,N_SPINP(e),XB(A)::QAR(B)
    • R(g);N_GUARD::QAR(B)
    • R(g);N_GUARD,SBLOCK::QAR(B)
    • R(g);SBLOCK::S(E),XP(c)
    • R(g);N_GUARD::QAR(B),XR(g)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(e)
      • Vars
        • R(g);N_GUARD,XB(A)::QAR(B)
        • R(a);SBLOCK::S(C)
        • R(g);SBLOCK::S(E),XP(c)
      • Refutation
        • R(a);XB(A)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(e)
      • Vars
        • R(a);N_GUARD,XB(A)::QAR(B)
        • R(a);SBLOCK::S(C)
        • R(g);SBLOCK::S(E),XP(c)
      • Refutation
        • R(g);XB(A)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(e)
    • Vars
      • R(a);N_GUARD,XB(A)::QAR(B)
      • R(g);N_GUARD,XB(A)::QAR(B)
      • R(a);SBLOCK::S(C)
      • R(g);SBLOCK::S(E),XP(c)
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