MESON Chess Problem Database

Problem Display
PID: 18668 (5n1n/5kPR/5PR1/2N5/2N1K3/8/B7/8 w - - 0 1)

Hartong, Jan

Probleemblad, 1957

5n1n/5kPR/5PR1/2N5/2N1K3/8/B7/8

#2

8 + 3

3976 FIDE Album (1956-1958) 1961
3174 The Two-move Chess Problem Tradition and Development 1966
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kg8
      • 2.gxh8Q#
      • 2.gxh8R#
    • 1...Se6
      • 2.g8Q#
    • 1...Sfxg6
      • 2.gxh8Q#
    • 1...Sd7
      • 2.g8Q#
      • 2.g8R#
    • 1...Sxh7
      • 2.g8Q#
  • Tries
    • 1.Kf5?
      • threat
        • 2.Sd6#
      • 1...Kg8
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Se6
        • 2.g8Q#
      • 1...Ke8!
    • 1.gxf8Q+?
      • 1...Kxg6
        • 2.Qh6#
        • 2.Qg7#
      • 1...Kxf8!
    • 1.gxh8Q+?
      • 1...Kxg6
        • 2.Qg7#
      • 1...Sxh7
        • 2.Se5#
        • 2.Qg8#
      • 1...Ke8!
    • 1.g8R+?
      • 1...Sxh7
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Ke8!
  • Keys
    • 1.Sd7!
      • 1...Ke6
        • 2.gxf8S#
      • 1...Kxg6
        • 2.g8Q#
      • 1...Ke8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kg8
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sfxg6
        • 2.Sd6#
      • 1...Sxd7
        • 2.g8Q#
      • 1...Sxh7
        • 2.g8Q#
      • 1...Shxg6
        • 2.Sd6#
      • 1...Se6
        • 2.g8Q#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::PXS(c)=Q
    • S(b);::P=Q
    • S(b);N_GUARD,SBLOCK,XR(F)::PXS(c)=Q
    • S(b);XR(H)::P=Q
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • B(A)+S(B),DCHECK
      • Vars
        • K(a);S_FLIGHT::PXS(c)=Q
        • S(b);::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(G);CHECK,XS(b)
      • Refutation
        • K(a);P-FLIGHT,XQ(G)
    • Try
      • P(G);CHECK,XS(c)
      • Vars
        • K(a);S_FLIGHT,XR(F)::QAR1(G)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • P(G);CHECK
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::PXS(b)=S
      • K(a);S_FLIGHT,XR(F)::P=Q
      • K(a);S_FLIGHT::PXS(b)=Q
      • K(a);S_FLIGHT::PXS(c)=Q
      • S(b);SBLOCK,XR(F)::B(A)+S(B),DCHECK
      • S(b);XS(D)::P=Q
      • S(b);XR(H)::P=Q
      • S(c);SBLOCK,XR(F)::B(A)+S(B),DCHECK
      • S(b);SBLOCK::P=Q
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