MESON Chess Problem Database

Problem Display
PID: 51025 (b7/n6K/BPk5/1p6/1p3N2/2p1Bp2/3R4/Q7 w - - 0 1)

Williams, Philip Hamilton

The Inquirer, 1913

b7/n6K/BPk5/1p6/1p3N2/2p1Bp2/3R4/Q7

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qf6#
    • 1...f2
      • 2.Qh1#
    • 1...b3
      • 2.Qxc3#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Se5#
        • 2.Se7#
      • 1...Sc8
        • 2.Se5#
      • 1...cxd2!
    • 1.Qb1?
      • threat
        • 2.Qe4#
        • 2.Qg6#
      • 1...Sc8
        • 2.Qe4#
      • 1...c2
        • 2.Qxc2#
      • 1...cxd2!
    • 1.Qd1?
      • threat
        • 2.Rd6#
        • 2.Qxf3#
      • 1...Sc8
        • 2.Qxf3#
      • 1...f2
        • 2.Rd6#
        • 2.Qf3#
        • 2.Qh1#
      • 1...cxd2!
    • 1.Qf1?
      • threat
        • 2.Qxf3#
      • 1...f2
        • 2.Qg2#
        • 2.Qh1#
      • 1...cxd2!
    • 1.Qh1?
      • threat
        • 2.Qxf3#
        • 2.Qh6#
      • 1...Sc8
        • 2.Qxf3#
      • 1...cxd2!
    • 1.Qa2?
      • threat
        • 2.Qd5#
        • 2.Qe6#
      • 1...Sc8
        • 2.Qd5#
      • 1...b3!
  • Keys
    • 1.Bc8!
      • 1...Sxc8
        • 2.Qxa8#
      • 1...cxd2
        • 2.Qf6#
      • 1...Bb7
        • 2.Bd7#
      • 1...c2
        • 2.Qf6#
      • 1...f2
        • 2.Qh1#
      • 1...b3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE::QAR(A)
    • P(b);OGATEB::QAB(A)
    • P(c);N_GUARD::QAR(A),XP(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::S(D)
      • Refutation
        • P(a);XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAB(A)
        • P(a);OGATEB::QAR(A),XP(a)
      • Refutation
        • P(a);XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAB(A),XP(b)
      • Refutation
        • P(a);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(b)
      • Refutation
        • P(a);XR(B)
    • Try
      • Q(A);P_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAB(A),XP(b)
      • Refutation
        • P(a);XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAB1(A)
      • Refutation
        • P(c);
  • Actual
    • B(E);
    • Vars
      • S(f);OGATE,XB(E)::QAB(A),XB(g)
      • P(a);OGATE,XR(B)::QAR(A)
      • B(g);SBLOCK::B(E)
      • P(a);OGATE::QAR(A)
      • P(b);OGATEB::QAB(A)
      • P(c);N_GUARD::QAR(A),XP(a)
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