MESON Chess Problem Database

Problem Display
PID: 203774 (7b/Bpp5/rn6/2k2pP1/RN1N1Q1K/1R5p/bPprPp2/5B2 w - - 0 1)

Clark, Cecil Henry Douglas

Chess Problem Research Pamphlet, 1954

7b/Bpp5/rn6/2k2pP1/RN1N1Q1K/1R5p/bPprPp2/5B2

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Rc3#
    • 1...Bb1
      • 2.Rc3#
  • Tries
    • 1.Sd3+?
      • 1...Rxd3
        • 2.Rb5#
      • 1...Kd5!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Rc3#
      • 1...Bxe5!
    • 1.e3?
      • threat
        • 2.Se6#
        • 2.Qxc7#
      • 1...Bxb3
        • 2.Sxb3#
        • 2.Qxc7#
      • 1...Bxd4
        • 2.Qxc7#
      • 1...Re2
        • 2.Qxc7#
      • 1...Rd3
        • 2.Qxc7#
      • 1...Be5
        • 2.Qxe5#
      • 1...c6
        • 2.Se6#
      • 1...Rxd4!
  • Keys
    • 1.e4!
      • threat
        • 2.Se6#
      • 1...Kxd4
        • 2.Sxa6#
      • 1...Rxd4
        • 2.Qxc7#
      • 1...Bxb3
        • 2.Sxb3#
      • 1...Bxd4
        • 2.Qxc7#
      • 1...Re2
        • 2.Sd3#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Be5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • K(f);N_SPINS(i),P-FLIGHT::R1(D)
    • B(a);N_GUARD::R(D)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(c);XS(F)::R1(D)
      • Refutation
        • K(f);N_SPINS(i),P-FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);N_SPINS(i),P-FLIGHT::R1(D)
      • Refutation
        • B(l);XQ(H)
    • Try
      • P(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(l);XS(G)::QAR2(H),XP(k)
        • R(c);::QAR2(H),XP(k)
        • B(l);N_GUARD::QAR2(H),XB(l)
        • P(k);::S(G)
      • Refutation
        • R(c);P_PINQ(H),XS(G)
  • Actual
    • P(C);
    • Threat
      • S(G)
    • Vars
      • K(f);S_FLIGHT,XS(G)::R(E)+S(F),XR(h)
      • R(c);SBLOCK,XS(G)::QAR2(H),XP(k)
      • B(a);XR(D)::S(G),XB(a)
      • B(l);SBLOCK,XS(G)::QAR2(H),XP(k)
      • R(c);N_GUARD::S(F)
      • R(c);N_GUARD::S(F),XR(c)
      • B(l);N_GUARD::QAR2(H),XB(l)
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