MESON Chess Problem Database

Problem Display
PID: 255902 (K7/NRN2PP1/1PPkBb2/2n2n1R/1P3P2/4r3/5B2/4Qbq1 w - - 0 1)

Groeneveld, Cornelis

Buletin Problemistic, 1983

K7/NRN2PP1/1PPkBb2/2n2n1R/1P3P2/4r3/5B2/4Qbq1

#2

14 + 7

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.f8Q#
    • 1...Ra3
      • 2.Se8#
    • 1...Rb3
      • 2.Se8#
    • 1...Rc3
      • 2.Se8#
    • 1...Rd3
      • 2.Scb5#
      • 2.Se8#
    • 1...Rf3
      • 2.Se8#
    • 1...Rg3
      • 2.Se8#
    • 1...Rh3
      • 2.Se8#
    • 1...Se7
      • 2.bxc5#
  • Tries
    • 1.Bd7?
      • threat
        • 2.Sc8#
      • 1...Re8+
        • 2.fxe8S#
      • 1...Ke7
        • 2.f8Q#
      • 1...Ra3
        • 2.bxc5#
      • 1...Se7
        • 2.Se8#
        • 2.bxc5#
      • 1...Sxd7!
    • 1.bxc5+?
      • 1...Ke7
        • 2.f8Q#
      • 1...Kxc5!
    • 1.f8Q+?
      • 1...Se7
        • 2.Rd5#
        • 2.bxc5#
      • 1...Be7!
    • 1.f8B+?
      • 1...Se7
        • 2.Rd5#
        • 2.bxc5#
      • 1...Be7!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Sc8#
      • 1...Re8+
        • 2.fxe8S#
      • 1...Ke7
        • 2.f8Q#
      • 1...Ra3
        • 2.bxc5#
      • 1...Se7
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(f);S_CUTB(g),S_CUTS(e),S_FLIGHT::P=Q
    • R(c);P_PINS(I)::S(K)
    • R(c);::S(K)
    • S(e);SBLOCK::P(C),XS(d)
  • Tries
    • Try
      • B(H);
      • Threat
        • S(I)
      • Vars
        • R(c);CHECK,OGATE::PXR(c)=S
        • K(f);P_SPINR(c),S_CUTB(g),S_CUTS(e),S_FLIGHT::P=Q
        • R(c);P_PINS(I)::P(C),XS(d)
      • Refutation
        • S(d);XB(H)
    • Try
      • P(C);CHECK,XS(d)
      • Vars
        • K(f);S_FLIGHT::P=Q
      • Refutation
        • K(f);P_SPINR(c),P_SPINS(e),S_FLIGHT,XP(C)
    • Try
      • P(L);CHECK
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • P(L);CHECK
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • B(H);
    • Threat
      • S(I)
    • Vars
      • R(c);CHECK,OGATE::PXR(c)=S
      • K(f);P_SPINR(c),S_CUTB(g),S_CUTS(e),S_FLIGHT::P=Q
      • R(c);P_PINS(I)::P(C),XS(d)
      • S(e);S_CUTR(c)::S(K)
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