MESON Chess Problem Database

Problem Display
PID: 158771 (8/2K5/6P1/1pk2p2/3pPp2/PP6/6Q1/n7 w - - 0 1)

Williams, JD

British Chess Magazine 13. Ty., 1906-1907

8/2K5/6P1/1pk2p2/3pPp2/PP6/6Q1/n7

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sxb3
      • 2.Qc2#
    • 1...d3
      • 2.Qg1#
      • 2.Qf2#
    • 1...fxe4
      • 2.Qg5#
  • Tries
    • 1.Qa2?
      • threat
        • 2.b4#
      • 1...Sxb3
        • 2.Qc2#
      • 1...d3
        • 2.Qf2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...b4!
    • 1.Qd2?
      • threat
        • 2.Qb4#
      • 1...b4
        • 2.Qxb4#
      • 1...Sc2
        • 2.Qxc2#
      • 1...fxe4!
    • 1.Qh2?
      • 1...Sxb3
        • 2.Qc2#
      • 1...fxe4
        • 2.Qh5#
      • 1...d3
        • 2.Qg1#
        • 2.Qf2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...f3
        • 2.Qe5#
        • 2.Qd6#
      • 1...b4!
    • 1.Qg5?
      • threat
        • 2.Qe7#
        • 2.Qxf5#
      • 1...d3
        • 2.Qg1#
      • 1...b4
        • 2.Qxf5#
      • 1...Sxb3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.b4#
      • 1...Sxb3
        • 2.Qc2#
      • 1...fxe4
        • 2.Qh5#
      • 1...d3
        • 2.Qf2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR(A),XS(a)
    • S(a);N_GUARD,XP(C)::QAR(A)
    • P(f);OGATEB,XP(D)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • P(C)
      • Vars
        • S(a);N_GUARD,XP(C)::QAR(A)
        • P(b);OGATEB::QAB(A)
        • S(a);N_GUARD::QAR(A),XS(a)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);::QAB1(A),XP(d)
        • S(a);N_GUARD::QAR(A),XS(a)
      • Refutation
        • P(f);XP(D)
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD,XP(C)::QAR(A)
        • P(f);OGATEB,XP(D)::QAR(A)
        • S(a);N_GUARD::QAR(A),XS(a)
      • Refutation
        • P(d);
    • Try
      • Q(A);P_PINP(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB::QAB(A)
        • P(d);::QAR(A),XP(f)
      • Refutation
        • S(a);XP(C)
  • Actual
    • Q(A);
    • Threat
      • P(C)
    • Vars
      • S(a);N_GUARD,XP(C)::QAR(A)
      • P(f);OGATEB,XP(D)::QAR(A)
      • P(b);OGATEB::QAB(A)
      • S(a);N_GUARD::QAR(A),XS(a)
      • P(d);N_GUARD::QAR1(A)
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