MESON Chess Problem Database

Problem Display
PID: 273599 (8/B7/8/3RN3/1r1p3r/R1N1k1Kp/1q1n4/2Qn1B2 w - - 0 1)

Koder, Gabor

diagrammes, 1978

8/B7/8/3RN3/1r1p3r/R1N1k1Kp/1q1n4/2Qn1B2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Sc4#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Rb5
      • 2.Sc4#
    • 1...Rb6
      • 2.Sc4#
    • 1...Rb7
      • 2.Sc4#
    • 1...Rb8
      • 2.Sc4#
    • 1...Re4
      • 2.Sxd1#
    • 1...Rg4+
      • 2.Sxg4#
    • 1...Rh5
      • 2.Sg4#
    • 1...Rh6
      • 2.Sg4#
    • 1...Rh7
      • 2.Sg4#
    • 1...Rh8
      • 2.Sg4#
    • 1...Sf2
      • 2.Qe1#
    • 1...Sxc3
      • 2.Qe1#
  • Keys
    • 1.Rxd4!
      • threat
        • 2.Sxd1#
        • 2.Sd5#
        • 2.Rd3#
        • 2.Re4#
      • 1...Rg4+
        • 2.Sxg4#
      • 1...Qxc3
        • 2.Qxd2#
      • 1...Rbxd4
        • 2.Sc4#
      • 1...Rhxd4
        • 2.Sg4#
      • 1...Sxc3
        • 2.Qe1#
      • 1...Rb6
        • 2.Rd3#
      • 1...Re4
        • 2.Sxd1#
        • 2.Sd5#
        • 2.Rd3#
        • 2.Rxe4#
      • 1...Sf2
        • 2.Sd1#
        • 2.Sd5#
        • 2.Rd3#
        • 2.Re4#
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • R(f);N_GUARD::S(G)
    • R(f);N_GUARD::S(G),XR(f)
    • R(f);N_GUARD,N_SPINP(g)::S(G)
    • R(h);SBLOCK::R(C)+S(D),DCHECK,XS(a)
    • R(h);CHECK,N_GUARD::S(G),XR(h)
    • R(h);N_GUARD::S(G)
    • S(a);OGATE::QAR2(A)
    • S(a);OGATE,XS(D)::QAR2(A)
  • Actual
    • R(F);XP(g)
    • Threat
      • DUALS(4)
    • Vars
      • R(h);CHECK,N_GUARD::S(G),XR(h)
      • Q(b);N_GUARD,P_SPINQ(b),XS(D)::QAB1(A),XS(c)
      • R(f);N_GUARD,P_SPINR(f),XR(F)::S(G)
      • R(h);N_GUARD,P_SPINR(h),XR(F)::S(G)
      • S(a);OGATE,XS(D)::QAR2(A)
      • R(f);::R1(F)
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