MESON Chess Problem Database

Problem Display
PID: 46560 (8/2K5/3P1NB1/1b2kPb1/3p4/4P3/5PP1/7Q w - - 0 1)

Willmott, Arthur

Problem Observer, 2003

8/2K5/3P1NB1/1b2kPb1/3p4/4P3/5PP1/7Q

#2

9 + 4

136 Problem Observer 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qh8#
    • 1...d3
      • 2.Qa1#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qxd4#
      • 1...Kxf6
        • 2.Qxd4#
      • 1...Bxe3!
    • 1.Qh2+?
      • 1...Kxf6
        • 2.Qh8#
      • 1...Bf4!
    • 1.f4+?
      • 1...Kxf6
        • 2.Qh8#
      • 1...Bxf4!
    • 1.exd4+?
      • 1...Kf4
        • 2.Qc1#
        • 2.Qh2#
        • 2.g3#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Kxd4!
  • Keys
    • 1.g3!
      • threat
        • 2.Sg4#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Bxf6
        • 2.f4#
      • 1...dxe3
        • 2.Qa1#
      • 1...Be2
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,S_FLIGHT,XS(G)::QAB(A)
    • P(a);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • K(c);S_FLIGHT,XS(G)::QAB(A),XP(a)
      • Refutation
        • B(d);XP(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XS(G)::QAB(A)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • P(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(G)::QAB(A)
      • Refutation
        • B(d);XP(B)
    • Try
      • P(D);CHECK,XP(a)
      • Vars
        • K(c);S_FLIGHT,XS(G)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT,XP(D)
  • Actual
    • P(C);
    • Threat
      • S(G)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(G)::QAB(A)
      • B(d);N_GUARD,SBLOCK,XS(G)::P(B)
      • P(a);OGATEB,XP(D)::QAB(A)
      • B(b);N_GUARD::S(G)
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