MESON Chess Problem Database

Problem Display
PID: 135116 (b7/3Q1R2/8/2pNP2K/n2Pk3/1N4Bn/8/5B2 w - - 0 1)

Schreckenbach, Michael

4th Comm., East German Chess Federation, 1985

b7/3Q1R2/8/2pNP2K/n2Pk3/1N4Bn/8/5B2

#2

9 + 5

102 Probleemblad 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Rf4#
    • 1...Sf2
      • 2.Rf4#
    • 1...Sf4+
      • 2.Rxf4#
    • 1...Sg5
      • 2.Rf4#
    • 1...cxd4
      • 2.Sd2#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Qf5#
      • 1...Sf4+
        • 2.Rxf4#
      • 1...Bxd5!
    • 1.Bf2?
      • threat
        • 2.Sd2#
      • 1...Sf4+
        • 2.Rxf4#
      • 1...Sxf2
        • 2.Rf4#
      • 1...cxd4!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Re3#
      • 1...Sf4+
        • 2.Rxf4#
      • 1...Kxf3
        • 2.Qg4#
      • 1...Bxd5
        • 2.Qf5#
      • 1...cxd4
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::R1(I)
    • S(a);CHECK,N_GUARD::R1(I),XS(a)
    • P(d);SBLOCK,XP(D)::S(B)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAB1(H)
      • Vars
        • S(a);CHECK,N_GUARD::R1(I),XS(a)
      • Refutation
        • B(e);XS(E)
    • Try
      • B(C);
      • Threat
        • S(B)
      • Vars
        • S(a);CHECK,N_GUARD::R1(I),XS(a)
        • S(a);N_GUARD,XB(C)::R1(I)
      • Refutation
        • P(d);XP(D)
  • Actual
    • R(I);
    • Threat
      • R1(I)
    • Vars
      • S(a);CHECK,N_GUARD::R1(I),XS(a)
      • K(c);S_FLIGHT,XR(I)::QAB1(H)
      • B(e);SBLOCK,XS(E)::QAB1(H)
      • P(d);SBLOCK,XP(D)::S(B)
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