MESON Chess Problem Database

Problem Display
PID: 215817 (1b1R3K/4nk2/r4N2/3P1P1P/3Q3B/8/8/5R2 w - - 0 1)

Nunnink, AC

Probleemblad, 1980

1b1R3K/4nk2/r4N2/3P1P1P/3Q3B/8/8/5R2

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.dxe6#
      • 2.fxe6#
    • 1...Rxf6
      • 2.Qxf6#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Rf8#
        • 2.Qg7#
      • 1...Be5+
        • 2.Sxe5#
      • 1...Sg6+
        • 2.fxg6#
      • 1...Rf6
        • 2.Rf8#
        • 2.Qxf6#
      • 1...Rg6
        • 2.Rf8#
        • 2.fxg6#
      • 1...Rh6+!
    • 1.Sh7?
      • threat
        • 2.Sg5#
        • 2.Rf8#
        • 2.Qg7#
      • 1...Sg6+
        • 2.fxg6#
      • 1...Sxd5
        • 2.Rf8#
        • 2.Qg7#
      • 1...Sxf5
        • 2.Rf8#
        • 2.Qg7#
      • 1...Rf6
        • 2.Sg5#
        • 2.Rf8#
        • 2.Qxf6#
      • 1...Rg6
        • 2.Rf8#
        • 2.fxg6#
      • 1...Rh6
        • 2.Rf8#
        • 2.Qg7#
      • 1...Bf4
        • 2.Rf8#
        • 2.Qg7#
      • 1...Sc6
        • 2.Rf8#
        • 2.Qf6#
        • 2.Qg7#
      • 1...Sc8
        • 2.Rf8#
        • 2.Qg7#
      • 1...Sg8
        • 2.Rf8#
        • 2.Qg7#
      • 1...Be5+!
    • 1.Sg8?
      • threat
        • 2.Qg7#
      • 1...Rh6+
        • 2.Sxh6#
      • 1...Sg6+
        • 2.fxg6#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rg6
        • 2.fxg6#
      • 1...Be5+!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qg7#
      • 1...Rh6+
        • 2.Sxh6#
      • 1...Be5+
        • 2.Sxe5#
      • 1...Sg6+
        • 2.fxg6#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rg6
        • 2.fxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XS(G)::QAR1(B),XR(a)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);CHECK,N_GUARD::S(G),XB(d)
        • S(b);CHECK,OGATE::R(A)+P(E)DCHECK,XS(b)
      • Refutation
        • R(a);CHECK
    • Try
      • S(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);CHECK,OGATE::R(A)+P(E)DCHECK,XS(b)
      • Refutation
        • B(d);CHECK
    • Try
      • S(G);
      • Threat
        • QAR1(B)
      • Vars
        • R(a);CHECK,N_GUARD::S(G),XR(a)
        • S(b);CHECK,OGATE::R(A)+P(E)DCHECK,XS(b)
        • R(a);N_GUARD::QAR1(B),XR(a)
        • R(a);OGATE::R(A)+P(E)DCHECK,XR(a)
      • Refutation
        • B(d);CHECK
  • Actual
    • S(G);
    • Threat
      • QAR1(B)
    • Vars
      • R(a);CHECK,N_GUARD::S(G),XR(a)
      • B(d);CHECK,N_GUARD::S(G),XB(d)
      • S(b);CHECK,OGATE::R(A)+P(E)DCHECK,XS(b)
      • R(a);N_GUARD::QAR1(B),XR(a)
      • R(a);OGATE::R(A)+P(E)DCHECK,XR(a)
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