MESON Chess Problem Database

Problem Display
PID: 140365 (1Br5/r5pB/3qp3/QnnNkpP1/7R/p2R4/4PP2/2NK4 w - - 0 1)

Clark, Cecil Henry Douglas

2nd Prize, BCPS 049. Ty., 1943

1Br5/r5pB/3qp3/QnnNkpP1/7R/p2R4/4PP2/2NK4

#2

11 + 10

56 The Problemist 1943

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3+
      • 2.Qxc3#
    • 1...Sc7
      • 2.Qc3#
    • 1...Se4
      • 2.f4#
  • Tries
    • 1.Sc3?
      • threat
        • 2.f4#
      • 1...Sxc3+
        • 2.Qxc3#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...f4!
    • 1.Sf6?
      • threat
        • 2.f4#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...f4
        • 2.Sg4#
      • 1...gxf6!
    • 1.Bxd6+?
      • 1...Sxd6
        • 2.Qc3#
      • 1...Kxd6!
    • 1.Qc3+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sxc3+!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sc4#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...Sd4
        • 2.Re3#
      • 1...Sb3
        • 2.Bxd6#
      • 1...Sa4
        • 2.Bxd6#
      • 1...Se4
        • 2.f4#
      • 1...Sa6
        • 2.Bxd6#
      • 1...Sb7
        • 2.Sd7#
      • 1...Sd7
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • S(b);CHECK,N_GUARD::QAB(G),XS(b)
    • S(b);N_GUARD,N_SPINQ(f)::QAB(G)
    • S(c);SBLOCK::P(D)
  • Tries
    • Try
      • S(H);P_SPINR(E)
      • Threat
        • P(D)
      • Vars
        • S(b);CHECK,OGATE,P_SPINS(c),XS(H)::QAB(G),XS(b)
        • S(c);P_SPINS(b),XR(E)::S(A),XS(c)
      • Refutation
        • P(e);
    • Try
      • S(H);P_SPINR(E)
      • Threat
        • P(D)
      • Vars
        • S(b);CHECK,N_GUARD,P_SPINS(c)::QAB(G),XS(b)
        • S(c);P_SPINS(b),XR(E)::S(A),XS(c)
        • P(e);N_GUARD,SBLOCK::S(H)
      • Refutation
        • P(i);XS(H)
    • Try
      • B(K);CHECK,XQ(f)
      • Vars
        • S(b);SBLOCK,XB(K)::QAB(G)
      • Refutation
        • K(d);S_FLIGHT,XB(K)
    • Try
      • Q(G);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(G),XS(b)
      • Refutation
        • S(b);CHECK,XQ(G)
  • Actual
    • S(H);P_SPINR(E)
    • Threat
      • S(H)
    • Vars
      • S(b);CHECK,N_GUARD,P_SPINS(c)::QAB(G),XS(b)
      • S(c);P_SPINS(b),XR(E)::S(A),XS(c)
      • S(b);N_PINR(E),P_SPINS(c)::R(E)
      • S(c);P_SPINS(b)::B(K),XQ(f)
      • S(c);P_SPINS(b),SBLOCK::P(D)
      • S(c);N_GUARD,P_SPINS(b),S_CUTR(h)::S(H)
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