MESON Chess Problem Database

Problem Display
PID: 239497 (n1R2r2/4kB1P/b1PpN1Kp/r1p3p1/3pN2B/5P1P/8/b3R3 w - - 0 1)

Haring, Jacobus

Magyar Sakkelet, 1964

n1R2r2/4kB1P/b1PpN1Kp/r1p3p1/3pN2B/5P1P/8/b3R3

#2

11 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re8
      • 2.Rxe8#
    • 1...Rg8+
      • 2.hxg8S#
    • 1...Sc7
      • 2.Rxc7#
    • 1...h5
      • 2.Bxg5#
  • Tries
    • 1.S6xg5?
      • threat
        • 2.Se6#
      • 1...Rg8+
        • 2.hxg8S#
      • 1...hxg5
        • 2.Bxg5#
      • 1...d3
        • 2.Sc3#
      • 1...c4
        • 2.Sc5#
      • 1...Rxf7!
  • Keys
    • 1.S4xg5!
      • threat
        • 2.Se4#
      • 1...Rg8+
        • 2.hxg8S#
      • 1...Rxf7
        • 2.Sxf7#
      • 1...hxg5
        • 2.Bxg5#
      • 1...d3
        • 2.Sd4#
      • 1...c4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(k);N_GUARD::R1(K),XR(k)
    • R(k);CHECK,OGATE::PXR(k)=S
    • S(j);N_GUARD::R(K),XS(j)
    • P(h);N_GUARD::B(E),XP(e)
  • Tries
    • Try
      • S(G);XP(e)
      • Threat
        • B(E)+S(G)
      • Vars
        • R(k);CHECK,OGATE::PXR(k)=S
        • P(h);OGATE,P_SPINP(h),XS(G)::B(E),XP(h)
        • P(b);S_CUTB(f)::R(A)+S(D)
        • P(d);S_CUTB(f)::R(A)+S(D)
      • Refutation
        • R(k);XB(I)
  • Actual
    • S(D);XP(e)
    • Threat
      • B(E)+S(D)
    • Vars
      • R(k);CHECK,OGATE::PXR(k)=S
      • R(k);XB(I)::B(E)+S(D),XR(k)
      • P(h);OGATE,P_SPINP(h),XS(D)::B(E),XP(h)
      • P(b);S_CUTB(f)::R(A)+S(G)
      • P(d);S_CUTB(f)::R(A)+S(G)
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