MESON Chess Problem Database

Problem Display
PID: 203773 (4K3/6p1/2Q3R1/2P1N1P1/p4kPn/rpBp2pq/3P2r1/5b1B w - - 0 1)

Clark, Cecil Henry Douglas

Chess Problem Research Pamphlet, 1954

4K3/6p1/2Q3R1/2P1N1P1/p4kPn/rpBp2pq/3P2r1/5b1B

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qe4#
    • 1...Rxd2
      • 2.Qe4#
    • 1...Rf2
      • 2.Qe4#
    • 1...Rh2
      • 2.Qe4#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sf5
      • 2.Qf3#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd4#
      • 1...Qxg4
        • 2.Qxg4#
      • 1...Sxg6
        • 2.Qf5#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Re2!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qc4#
      • 1...Qxg4
        • 2.Qxg4#
      • 1...Rxd2
        • 2.Bxd2#
      • 1...Sxg6
        • 2.Qf5#
      • 1...Re2
        • 2.Sxd3#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(b);::QAR1(H)
    • R(b);XP(B)::QAR1(H)
    • S(j);N_GUARD::QAR1(H),XS(j)
    • S(j);N_GUARD::QAR1(H)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • K(i);P-FLIGHT,P_SPINR(b)::QAR1(H)
        • Q(g);OGATE,XP(D)::QAR1(H),XQ(g)
        • S(j);N_GUARD,XR(I)::QAR1(H)
        • S(j);N_GUARD::QAR1(H)
        • S(j);N_GUARD::QAR1(H),XS(j)
      • Refutation
        • R(b);P_PINS(F)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)
    • Vars
      • K(i);P-FLIGHT,P_SPINR(b)::QAR2(H)
      • Q(g);OGATE,XP(D)::QAR1(H),XQ(g)
      • R(b);OGATE,XP(B)::B(C),XR(b)
      • S(j);N_GUARD,XR(I)::QAR1(H)
      • R(b);S_CUTB(a)::S(F),XP(e)
      • S(j);N_GUARD::QAR1(H)
      • S(j);N_GUARD::QAR1(H),XS(j)
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