MESON Chess Problem Database

Problem Display
PID: 258464 (8/3bP2B/1K2R3/3kn1P1/1ppNR3/1P1p2PQ/5p2/4q3 w - - 0 1)

Fenner, A Jack

2nd Prize, British Chess Magazine 02. TT, 1986

8/3bP2B/1K2R3/3kn1P1/1ppNR3/1P1p2PQ/5p2/4q3

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe6
      • 2.Qxe6#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qxe5#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...cxb3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.R6xe5#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Kxe4
        • 2.Qg2#
      • 1...Kxe6
        • 2.Bg8#
      • 1...Qxe4
        • 2.Rd6#
      • 1...Bxe6
        • 2.Rd4#
      • 1...Qc3
        • 2.Se3#
      • 1...Qa1
        • 2.Se3#
      • 1...Sf3
        • 2.bxc4#
      • 1...Sg4
        • 2.bxc4#
      • 1...Sc6
        • 2.bxc4#
      • 1...Sg6
        • 2.bxc4#
      • 1...Sf7
        • 2.bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • B(h);OGATE,XR(H)::QAB1(C),XB(h)
  • Tries
    • Try
      • Q(C);P_PINS(g)
      • Threat
        • QAR1(C),XS(g)
      • Vars
        • Q(a);OGATE,XR(E)::QAB1(C),XQ(a)
      • Refutation
        • P(e);XP(A)
  • Actual
    • S(D);
    • Threat
      • R1(H),XS(g)
    • Vars
      • Q(a);CHECK,N_GUARD::S(D),XQ(a)
      • K(f);OGATEB,P_SPINS(g),S_FLIGHT,XR(E)::QAB(C)
      • K(f);OGATEB,P_SPINS(g),S_FLIGHT,XR(H)::B(J)
      • Q(a);SBLOCK,XR(E)::R1(H)
      • B(h);SBLOCK,XR(H)::R1(E)
      • Q(a);N_GUARD::S(D)
      • S(g);N_GUARD::P(A),XP(e)
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