MESON Chess Problem Database

Problem Display
PID: 203771 (8/b7/p1B5/1Np1Rp2/2k5/P1n5/1pQ2P1K/3n2B1 w - - 0 1)

Clark, Cecil Henry Douglas

Chess Problem Research Pamphlet, 1954

8/b7/p1B5/1Np1Rp2/2k5/P1n5/1pQ2P1K/3n2B1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf2
      • 2.Qxc3#
    • 1...Se3
      • 2.Qxc3#
    • 1...f4
      • 2.Re4#
  • Tries
    • 1.Rxf5?
      • threat
        • 2.Rf4#
      • 1...Sxf2
        • 2.Qxc3#
      • 1...Bb8+!
    • 1.f3?
      • threat
        • 2.Sd6#
      • 1...axb5
        • 2.Bd5#
      • 1...Sf2
        • 2.Qxc3#
      • 1...Se3
        • 2.Qxc3#
      • 1...Bb8!
  • Keys
    • 1.f4!
      • threat
        • 2.Sd6#
      • 1...axb5
        • 2.Bd5#
      • 1...Bb8
        • 2.Rxc5#
      • 1...Sf2
        • 2.Qxc3#
      • 1...Se3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD,XP(C)::QAR1(B),XS(c)
    • S(a);N_GUARD::QAR1(B),XS(c)
    • P(f);N_GUARD::R(G)
  • Tries
    • Try
      • R(G);XP(f)
      • Threat
        • R(G)
      • Vars
        • S(a);N_GUARD,XP(C)::QAR1(B),XS(c)
      • Refutation
        • B(h);CHECK
    • Try
      • P(C);
      • Threat
        • S(F)
      • Vars
        • P(g);SBLOCK,XS(F)::B(H)
        • S(a);N_GUARD::QAR1(B),XS(c)
      • Refutation
        • B(h);P_PINR(G)
  • Actual
    • P(C);
    • Threat
      • S(F)
    • Vars
      • P(g);SBLOCK,XS(F)::B(H)
      • B(h);N_GUARD::R1(G),XP(e)
      • S(a);N_GUARD::QAR1(B),XS(c)
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