MESON Chess Problem Database

Problem Display
PID: 147252 (3R2K1/3N4/2b1p3/4p2Q/R1nqk1B1/1Np3P1/3p1p2/4br2 w - - 0 1)

Clark, Cecil Henry Douglas

2nd HM., Grantham Journal, 1926

(First published on Sat Jul 3 1926)

3R2K1/3N4/2b1p3/4p2Q/R1nqk1B1/1Np3P1/3p1p2/4br2

#2

8 + 11

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sf6#
    • 1...Qe3
      • 2.Sf6#
    • 1...Qd3
      • 2.Qxe5#
    • 1...Se3
      • 2.Sdc5#
  • Tries
    • 1.Be2?
      • threat
        • 2.Qf3#
      • 1...Kd5
        • 2.Sf6#
      • 1...Qe3
        • 2.Sf6#
        • 2.Qxe5#
      • 1...Qd3
        • 2.Qxe5#
      • 1...Ke3!
    • 1.Qg6+?
      • 1...Kd5
        • 2.Sb6#
        • 2.Sf6#
      • 1...Ke3!
    • 1.Qh7+?
      • 1...Kd5
        • 2.Sb6#
        • 2.Sf6#
      • 1...Ke3!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Qf3#
      • 1...Kd3
        • 2.Qe2#
      • 1...Ke3
        • 2.Qe2#
      • 1...Kd5
        • 2.Sf6#
      • 1...Qe3
        • 2.Sf6#
      • 1...Qd3
        • 2.Qxe5#
      • 1...Se3
        • 2.Sdc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(h);P_SPINP(i),S_FLIGHT::R(G)+S(F),DCHECK
    • Q(g);P_SPINS(f),SBLOCK::S(F)
    • Q(g);N_GUARD,P_SPINS(f),SBLOCK::QAR1(E),XP(i)
    • S(f);P_SPINQ(g),SBLOCK::S(F)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAB1(E)
      • Vars
        • K(h);P_SPINP(i),S_FLIGHT::R(G)+S(F),DCHECK
        • Q(g);N_GUARD,P_SPINS(f)::QAR1(E),XP(i)
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAB1(E)
    • Vars
      • K(h);S_FLIGHT::QAB1(E)
      • K(h);P-FLIGHT::QAR1(E)
      • K(h);P_SPINP(i),S_FLIGHT::R(G)+S(F),DCHECK
      • Q(g);P_SPINS(f),SBLOCK::S(F)
      • Q(g);N_GUARD,P_SPINS(f),SBLOCK::QAR1(E),XP(i)
      • S(f);P_SPINQ(g),SBLOCK::S(F)
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