MESON Chess Problem Database

Problem Display
PID: 7149 (R7/4pN2/4p3/2K5/1Qnnk3/1pR3PB/5P2/2rrN1b1 w - - 0 1)

Onkoud, Abdelaziz

Probleemblad, 1998

R7/4pN2/4p3/2K5/1Qnnk3/1pR3PB/5P2/2rrN1b1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.f3#
    • 1...Sd2
      • 2.Qxd4#
    • 1...Sa3
      • 2.f3#
    • 1...Se3
      • 2.f3#
    • 1...Sa5
      • 2.f3#
    • 1...Se5
      • 2.Sg5#
    • 1...Sb6
      • 2.f3#
    • 1...Sd6
      • 2.f3#
    • 1...Se2
      • 2.Re3#
    • 1...Sf3
      • 2.Re3#
    • 1...Sb5
      • 2.Re3#
    • 1...Sf5
      • 2.Bg2#
    • 1...Sc6
      • 2.Re3#
    • 1...e5
      • 2.Sg5#
  • Tries
    • 1.Sf3?
      • threat
        • 2.S3g5#
        • 2.S7g5#
      • 1...Sxf3
        • 2.Re3#
      • 1...Rxc3!
    • 1.Qb8?
      • threat
        • 2.Sg5#
        • 2.Qf4#
      • 1...Se5
        • 2.Sg5#
        • 2.Qxe5#
      • 1...Se2
        • 2.Sg5#
      • 1...Sf3
        • 2.Qf4#
      • 1...e5
        • 2.Sg5#
      • 1...Sd6!
  • Keys
    • 1.Rh8!
      • threat
        • 2.Rh4#
      • 1...Se3
        • 2.f3#
      • 1...Se5
        • 2.Sg5#
      • 1...Se2
        • 2.Re3#
      • 1...Sf3
        • 2.Re3#
      • 1...Sf5
        • 2.Bg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • S(e);P_PINR(C),P_SPINS(f)::P(B)
    • S(e);OGATE,P_PINR(C),P_SPINS(f)::QAR1(F),XS(f)
    • S(e);P_PINR(C),P_SPINS(f),SBLOCK::S(H)
    • S(f);P_PINP(B),P_SPINS(e)::R1(C)
    • S(f);N_GUARD,P_PINP(B),P_SPINS(e),SBLOCK::B(E)
    • P(h);SBLOCK::S(H)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);P_PINP(B),P_SPINS(e),XS(A)::R1(C)
      • Refutation
        • R(a);XR(C)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);P_PINP(B)::S(H)
        • S(f);P_PINP(B)::QAR1(F)
        • P(h);::S(H)
      • Refutation
        • S(e);P_PINR(C)
  • Actual
    • R(I);
    • Threat
      • R(I)
    • Vars
      • S(e);P_PINR(C),P_SPINS(f)::P(B)
      • S(e);P_PINR(C),P_SPINS(f),SBLOCK::S(H)
      • S(f);P_PINP(B),P_SPINS(e)::R1(C)
      • S(f);N_GUARD,P_PINP(B),P_SPINS(e),SBLOCK::B(E)
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