MESON Chess Problem Database

Problem Display
PID: 44627 (B3N3/3p2B1/3Pb2K/q1k2P2/2N2R2/P7/8/1Q6 w - - 0 1)

Williams, Philip Hamilton

British Chess Bulletin, 1911

B3N3/3p2B1/3Pb2K/q1k2P2/2N2R2/P7/8/1Q6

#2

10 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qb6#
    • 1...Qd2
      • 2.Qb6#
    • 1...Qc3
      • 2.Qb6#
    • 1...Qb4
      • 2.Qxb4#
    • 1...Qb6
      • 2.Qxb6#
    • 1...Qc7
      • 2.Qb4#
    • 1...Qd8
      • 2.Qb4#
    • 1...Qxa3
      • 2.Qb6#
    • 1...Qa4
      • 2.Qb6#
    • 1...Qb5
      • 2.Qg1#
    • 1...Qa6
      • 2.Qb4#
    • 1...Qa7
      • 2.Qb4#
    • 1...Bxc4
      • 2.Bd4#
    • 1...Bxf5
      • 2.Qxf5#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Qg1#
      • 1...Qxc7
        • 2.Qb4#
      • 1...Qxa3
        • 2.Qb5#
        • 2.Qb6#
      • 1...Qxa8
        • 2.Qb5#
        • 2.Qb6#
      • 1...Qe1
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Qd2
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Qc3
        • 2.Sa6#
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bxc4!
    • 1.Qb3?
      • threat
        • 2.Bd4#
      • 1...Qb4
        • 2.Qxb4#
      • 1...Qd2
        • 2.Qb6#
      • 1...Qc3
        • 2.Qb6#
      • 1...Qxa8!
  • Keys
    • 1.Sf6!
      • 1...Qxa3
        • 2.Qb6#
      • 1...Qxa8
        • 2.Qb6#
      • 1...Bxc4
        • 2.Se4#
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Qb4
        • 2.Qxb4#
      • 1...Qe1
        • 2.Qb6#
      • 1...Qd2
        • 2.Qb6#
      • 1...Qc3
        • 2.Qb6#
      • 1...Qb6
        • 2.Qxb6#
      • 1...Qc7
        • 2.Qb4#
      • 1...Qd8
        • 2.Qb4#
      • 1...Qa4
        • 2.Qb6#
      • 1...Qb5
        • 2.Qg1#
      • 1...Qa6
        • 2.Qb4#
      • 1...Qa7
        • 2.Qb4#
      • 1...Bd5
        • 2.Sxd7#
      • 1...Bf7
        • 2.Sxd7#
      • 1...Bg8
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD::QAB1(A)
    • Q(a);N_GUARD,P_PINR(D)::QAB1(A)
    • Q(a);N_GUARD::QAB1(A),XQ(a)
    • Q(a);N_GUARD,XP(B)::QAB1(A)
    • Q(a);SBLOCK::QAB(A)
    • B(c);SBLOCK,XS(C)::B(H)
    • B(c);OGATE,XP(E)::QAR(A),XB(c)
  • Tries
    • Try
      • S(J);
      • Threat
        • QAB(A)
      • Vars
        • Q(a);N_GUARD,XS(J)::QAB1(A)
      • Refutation
        • B(c);XS(C)
    • Try
      • Q(A);
      • Threat
        • B(H)
      • Vars
        • Q(a);N_GUARD::QAB1(A),XQ(a)
        • Q(a);N_GUARD,P_PINR(D)::QAB1(A)
        • Q(a);N_GUARD::QAB1(A)
      • Refutation
        • Q(a);XB(I)
  • Actual
    • S(J);
    • Vars
      • Q(a);N_GUARD,XP(B)::QAB1(A)
      • Q(a);N_GUARD,XB(I)::QAB1(A)
      • B(c);SBLOCK,XS(C)::S(J)
      • B(c);OGATE,XP(E)::QAR(A),XB(c)
      • Q(a);N_GUARD::QAB1(A),XQ(a)
      • Q(a);N_GUARD::QAB1(A)
      • Q(a);N_GUARD,P_PINR(D)::QAB1(A)
      • Q(a);SBLOCK::QAB(A)
      • B(c);N_GUARD::S(J),XP(d)
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