MESON Chess Problem Database

Problem Display
PID: 160831 (1b1KN3/2Pp4/2p2P2/3k4/1PN3Qp/8/3npP1r/qn1R1B2 w - - 0 1)

Williams, Philip Hamilton

London Opinion, 1904

1b1KN3/2Pp4/2p2P2/3k4/1PN3Qp/8/3npP1r/qn1R1B2

#2

10 + 10

15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sb6#
    • 1...Qxf6+
      • 2.Sxf6#
    • 1...Rh1
      • 2.Bg2#
    • 1...Rg2
      • 2.Bxg2#
    • 1...Bxc7+
      • 2.Sxc7#
    • 1...Sc3
      • 2.Rxd2#
  • Tries
    • 1.Rxd2+?
      • 1...Qd4
        • 2.Rxd4#
      • 1...Sxd2!
  • Keys
    • 1.f3!
      • threat
        • 2.Qe4#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Bxc7+
        • 2.Sxc7#
      • 1...exd1Q
        • 2.Qxd7#
      • 1...exd1S
        • 2.Qxd7#
      • 1...exd1B
        • 2.Qxd7#
      • 1...exd1R
        • 2.Qxd7#
      • 1...Qd4
        • 2.Qg8#
      • 1...e1Q
        • 2.Qxd7#
      • 1...e1R
        • 2.Qxd7#
      • 1...Qe5
        • 2.Sb6#
      • 1...Sc3
        • 2.Rxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(a);SBLOCK::S(E)
    • Q(a);CHECK,XP(G)::S(J),XQ(a)
    • R(e);N_GUARD::B(B)
    • R(e);N_GUARD::B(B),XR(e)
    • B(j);CHECK,XP(H)::S(J),XB(j)
    • S(b);N_GUARD,S_CUTQ(a)::R(A),XS(c)
  • Tries
    • Try
      • R(A);CHECK,XS(c)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::R1(A),XQ(a)
      • Refutation
        • S(b);XR(A)
  • Actual
    • P(C);
    • Threat
      • QAB1(F)
    • Vars
      • Q(a);CHECK,XP(G)::S(J),XQ(a)
      • B(j);CHECK,XP(H)::S(J),XB(j)
      • P(d);N_SPINS(c),XR(A)::QAR2(F),XP(i)
      • Q(a);N_SPINS(c),SBLOCK::QAB(F)
      • P(d);::QAR2(F),XP(i)
      • Q(a);SBLOCK::S(E)
      • S(b);N_GUARD,S_CUTQ(a)::R(A),XS(c)
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