MESON Chess Problem Database

Problem Display
PID: 220455 (3q4/3pb1B1/r2r2p1/3PN3/1RR1Pk1P/p4p2/2p5/Kb2n1Qn w - - 0 1)

Clark, Cecil Henry Douglas

British Chess Magazine, 1925

3q4/3pb1B1/r2r2p1/3PN3/1RR1Pk1P/p4p2/2p5/Kb2n1Qn

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Qg5#
    • 1...Sd3
      • 2.Sxd3#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qg4#
      • 1...Rf6
        • 2.Qg5#
      • 1...Sg2
        • 2.Rxf3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sf2
        • 2.Qh2#
      • 1...Sg3
        • 2.Qe3#
      • 1...Bf6!
    • 1.Qh2+?
      • 1...Sg3
        • 2.Qd2#
      • 1...Ke3!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Qg4#
      • 1...Rf6
        • 2.Qg5#
      • 1...Bf6
        • 2.Sxg6#
      • 1...Sg2
        • 2.Rxf3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sf2
        • 2.Qh2#
      • 1...Sg3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(i);S_CUTB(l)::QAB1(B)
    • S(b);N_GUARD::S(H),XS(b)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAR1(B)
      • Vars
        • R(i);S_CUTB(l)::QAB1(B)
        • S(b);N_GUARD::R1(C),XP(f)
        • S(b);N_GUARD::S(H),XS(b)
        • S(c);N_GUARD::QAB(B)
        • S(c);SBLOCK::QAB1(B)
      • Refutation
        • B(l);P_PINS(H)
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);P_SPINS(c),SBLOCK::QAB(B)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • QAR1(B)
    • Vars
      • R(i);S_CUTB(l)::QAB1(B)
      • B(l);S_CUTR(i)::S(H),XP(j)
      • S(b);N_GUARD::R1(D),XP(f)
      • S(b);N_GUARD::S(H),XS(b)
      • S(c);N_GUARD::QAB(B)
      • S(c);SBLOCK::QAB1(B)
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