MESON Chess Problem Database

Problem Display
PID: 158692 (8/3K4/8/1ppk4/4pP2/1PP5/3p2n1/1Q6 w - - 0 1)

Williams, JD

British Chess Magazine 13. Ty., 1906-1907

8/3K4/8/1ppk4/4pP2/1PP5/3p2n1/1Q6

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...d1Q
      • 2.Qxd1#
    • 1...d1S
      • 2.Qxd1#
    • 1...d1B
      • 2.Qxd1#
    • 1...d1R
      • 2.Qxd1#
    • 1...e3
      • 2.Qd3#
      • 2.Qf5#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qh5#
        • 2.Qxd2#
      • 1...e3
        • 2.Qf3#
      • 1...c4
        • 2.Qh5#
      • 1...Se1
        • 2.Qh5#
      • 1...Se3
        • 2.Qxd2#
      • 1...Sh4
        • 2.Qxd2#
      • 1...Sxf4!
  • Keys
    • 1.Qg1!
      • 1...Sxf4
        • 2.Qg5#
      • 1...e3
        • 2.Qxg2#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1S
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Se1
        • 2.Qg5#
        • 2.Qg8#
      • 1...Se3
        • 2.Qg8#
      • 1...Sh4
        • 2.Qg8#
      • 1...b4
        • 2.c4#
      • 1...c4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR(A),XQ(a)
    • P(a);OGATEB::QAR(A),XS(a)
    • P(a);OGATEB::QAR(A),XB(a)
    • P(a);OGATEB::QAR(A),XR(a)
  • Tries
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::QAB(A)
        • P(e);::QAR(A)
        • S(b);::QAR(A)
        • S(b);::QAR(A),XP(a)
      • Refutation
        • S(b);XP(D)
  • Actual
    • Q(A);
    • Vars
      • S(b);OGATE,XP(D)::QAR(A)
      • P(c);OGATEB::QAB(A),XS(b)
      • P(a);OGATEB::QAR(A),XQ(a)
      • P(a);OGATEB::QAR(A),XS(a)
      • P(a);OGATEB::QAR(A),XB(a)
      • P(a);OGATEB::QAR(A),XR(a)
      • S(b);OGATE::QAB(A)
      • P(d);N_GUARD::P(C)
      • P(e);N_GUARD::QAR1(A)
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