MESON Chess Problem Database

Problem Display
PID: 97916 (1R2n3/2B5/1PkP1n2/R3P3/8/5K1Q/8/8 w - - 0 1)

Haring, Jacobus

Problemas, 1967

1R2n3/2B5/1PkP1n2/R3P3/8/5K1Q/8/8

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe6?
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Sxc7
        • 2.dxc7#
      • 1...Se4
        • 2.Qxe8#
      • 1...Sg4
        • 2.Qxe8#
      • 1...Sd5
        • 2.Qxe8#
      • 1...Sh5
        • 2.Qxe8#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sh7
        • 2.Qxe8#
      • 1...Sg8
        • 2.Qxe8#
      • 1...Sg7!
    • 1.d7?
      • threat
        • 2.d8S#
      • 1...Sg4
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Sxd7!
  • Keys
    • 1.Qc8!
      • 1...Sxd6
        • 2.Bxd6#
      • 1...Sxc7
        • 2.Qxc7#
      • 1...Se4
        • 2.Qxe8#
      • 1...Sg4
        • 2.Qxe8#
      • 1...Sd5
        • 2.Qxe8#
      • 1...Sh5
        • 2.Qxe8#
      • 1...Sd7
        • 2.Qb7#
      • 1...Sh7
        • 2.Qxe8#
      • 1...Sg8
        • 2.Qxe8#
      • 1...Sg7
        • 2.Bd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • S(c);OGATE,P_SPINS(c),XP(F)::QAR1(B),XS(c)
        • S(c);OGATE,XB(G)::QAR(B)+P(F),XS(c)
        • S(b);N_GUARD::QAB(B),XS(c)
        • S(b);N_GUARD,SBLOCK::QAB1(B)
      • Refutation
        • S(c);
    • Try
      • P(F);
      • Threat
        • P=S
      • Vars
        • S(b);N_GUARD::PXS(c)=Q
      • Refutation
        • S(b);XP(F)
  • Actual
    • Q(B);
    • Vars
      • S(c);OGATE,XP(F)::QAR(B)+B(G),XS(c)
      • S(c);OGATE,P_SPINS(c),XB(G)::QAR1(B),XS(c)
      • S(b);N_GUARD::QAB(B),XS(c)
      • S(b);SBLOCK::QAB1(B)
      • S(c);N_GUARD::QAR(B)+B(G)
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