MESON Chess Problem Database

Problem Display
PID: 197368 (2rR4/R2NPNb1/1pp1kPPp/2p2n2/2P5/3K4/8/8 w - - 0 1)

Hoek, Willem

The Problemist, 1981

2rR4/R2NPNb1/1pp1kPPp/2p2n2/2P5/3K4/8/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd8
      • 2.exd8S#
    • 1...Bxf6
      • 2.Sf8#
    • 1...Bf8
      • 2.exf8S#
  • Tries
    • 1.Sf8+?
      • 1...Kxf6
        • 2.e8S#
      • 1...Bxf8!
    • 1.Sg5+?
      • 1...Kd6
        • 2.e8S#
      • 1...hxg5!
  • Keys
    • 1.e8S!
      • 1...Rxd8
        • 2.Sxd8#
      • 1...Bxf6
        • 2.Sf8#
      • 1...Se3
        • 2.Sxg7#
      • 1...Sg3
        • 2.Sxg7#
      • 1...Sd4
        • 2.Sxg7#
      • 1...Sh4
        • 2.Sxg7#
      • 1...Sd6
        • 2.Sxg7#
      • 1...Se7
        • 2.Sxg7#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Ra8
        • 2.Sc7#
      • 1...Rb8
        • 2.Sc7#
      • 1...Bf8
        • 2.Sxf8#
      • 1...Bh8
        • 2.Sf8#
      • 1...b5
        • 2.Sxc5#
      • 1...h5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(h);OGATE,P_PINS(F),XR(I)::PXR(h)=S
    • B(g);N_GUARD,SBLOCK,XP(C)::S(F)
    • B(g);OGATE::PXB(g)=S
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(C)::P=S
      • Refutation
        • B(g);XS(F)
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT::P=S
      • Refutation
        • P(f);XS(H)
  • Actual
    • P(G);
    • Vars
      • R(h);P_PINS(F),XR(I)::S(H),XR(h)
      • B(g);N_GUARD,XP(C)::S(F)
      • S(b);N_GUARD::S(G),XB(g)
      • R(h);N_GUARD::S(G),XR(h)
      • R(h);N_GUARD::S(G)
      • B(g);N_GUARD::S(F),XB(g)
      • B(g);N_GUARD::S(F)
      • P(c);N_GUARD::S(F),XP(a)
      • P(f);N_GUARD::S(H)
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