MESON Chess Problem Database

Problem Display
PID: 144492 (8/4rpp1/5k2/2N4Q/4nP2/B4N2/8/K7 w - - 0 1)

Lewis, Sally

British Chess Magazine, 1995

8/4rpp1/5k2/2N4Q/4nP2/B4N2/8/K7

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Sd7#
    • 1...Sd2
      • 2.Qg5#
    • 1...Sf2
      • 2.Qg5#
    • 1...Sc3
      • 2.Qg5#
    • 1...Sg3
      • 2.Qg5#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sd6
      • 2.Qg5#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Qf5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Re6
        • 2.Sd7#
      • 1...Ra7
        • 2.Qe5#
      • 1...Rb7
        • 2.Qe5#
      • 1...Rc7
        • 2.Qe5#
      • 1...Rd7
        • 2.Qe5#
      • 1...g5
        • 2.Qh6#
        • 2.Qh8#
      • 1...g6
        • 2.Qh8#
      • 1...Sg3
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd6
        • 2.Qg5#
      • 1...Re8!
    • 1.Bb2+?
      • 1...Sc3
        • 2.Qg5#
      • 1...Re5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf5#
      • 1...Re5
        • 2.Sd7#
      • 1...Re6
        • 2.Sd7#
      • 1...Ra7
        • 2.Sxe4#
      • 1...Rb7
        • 2.Sxe4#
      • 1...Rc7
        • 2.Sxe4#
      • 1...Rd7
        • 2.Sxe4#
        • 2.Sxd7#
      • 1...Re8
        • 2.Sd7#
      • 1...g5
        • 2.Qh6#
      • 1...g6
        • 2.Qh8#
      • 1...Sg3
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD,SBLOCK::S(E)
    • S(a);N_GUARD::QAB1(F)
    • S(a);N_GUARD::QAB1(F),XS(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • R(c);N_GUARD::QAB1(F),XR(c)
        • R(c);N_GUARD,SBLOCK::S(E)
        • R(c);N_GUARD,P_PINB(B)::QAB1(F)
        • R(c);N_GUARD::QAB1(F)
        • P(e);OGATEB::QAB(F)
        • S(a);N_GUARD::QAB1(F)
        • S(a);N_GUARD::QAB1(F),XS(a)
      • Refutation
        • R(c);
    • Try
      • B(B);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAB1(F)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(C);
    • Threat
      • QAR1(F)
    • Vars
      • R(c);N_GUARD::S(E)
      • R(c);N_GUARD,P_PINB(B)::S(E),XS(a)
      • R(c);N_GUARD::S(E),XS(a)
      • P(e);N_GUARD::QAR2(F)
      • P(e);OGATEB,SBLOCK::QAB(F)
      • S(a);N_GUARD::QAB1(F)
      • S(a);N_GUARD::QAB1(F),XS(a)
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