MESON Chess Problem Database

Problem Display
PID: 273729 (8/4pK2/4BPNp/6kN/r7/r5P1/3PnpR1/2Bb1Q1R w - - 0 1)

le Grand, Henk

1st Comm., Grunenwald/Monreal JT (diagrammes), 1978

8/4pK2/4BPNp/6kN/r7/r5P1/3PnpR1/2Bb1Q1R

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.gxf4#
    • 1...Sxc1
      • 2.Qb5#
    • 1...Sg1
      • 2.Qb5#
    • 1...Sc3
      • 2.d4#
    • 1...Sxg3
      • 2.Qb5#
    • 1...Sd4
      • 2.d3#
    • 1...Sf4
      • 2.gxf4#
  • Tries
    • 1.d3+?
      • 1...Rf4
        • 2.gxf4#
      • 1...Sf4
        • 2.gxf4#
      • 1...Sxc1!
    • 1.d4+?
      • 1...Sxc1
        • 2.Qb5#
      • 1...Sf4
        • 2.Bxf4#
        • 2.Qb5#
        • 2.gxf4#
      • 1...Re3!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Rh5#
      • 1...Sxc1
        • 2.Qb5#
      • 1...Sxg3
        • 2.Qb5#
      • 1...h5
        • 2.Rxh5#
      • 1...Rh4
        • 2.gxh4#
      • 1...Sg1
        • 2.Qb5#
      • 1...Sc3
        • 2.d4#
      • 1...Sd4
        • 2.d3#
      • 1...Sf4
        • 2.gxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);OGATE,P_PINP(I)::R(E)+P(F)DCHECK,XR(e)
    • S(b);OGATE,XB(A)::QAR(B)
    • S(b);OGATE::QAR(B)
    • S(b);N_GUARD,S_CUTR(d)::B(A)+P(D)
    • S(b);OGATE,P_SPINS(b),XP(F)::QAR(B)
    • S(b);N_GUARD,S_CUTR(e)::B(A)+P(D)
    • S(b);OGATE::R(E)+P(F)DCHECK,XS(b)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • R(e);OGATE,P_PINP(I),P_SPINR(e)::R(E)+P(F)DCHECK,XR(e)
        • S(b);OGATE,P_SPINS(b)::R(E)+P(F)DCHECK,XS(b)
      • Refutation
        • S(b);XB(A)
    • Try
      • P(D);CHECK
      • Vars
        • S(b);OGATE,XB(A)::QAR(B)
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • S(G);
    • Threat
      • R1(C)
    • Vars
      • S(b);OGATE,XB(A)::QAR(B)
      • S(b);OGATE,P_SPINS(b),XP(F)::QAR(B)
      • P(g);::R1(C),XP(g)
      • R(e);OGATE::R(E)+P(F)DCHECK,XR(e)
      • S(b);OGATE::QAR(B)
      • S(b);N_GUARD,S_CUTR(d)::B(A)+P(D)
      • S(b);N_GUARD,S_CUTR(e)::B(A)+P(D)
      • S(b);OGATE::R(E)+P(F)DCHECK,XS(b)
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