MESON Chess Problem Database

Problem Display
PID: 78657 (7K/8/N3N2B/1np5/2P5/1Bk5/P7/bn3Q2 w - - 0 1)

Willmott, Arthur

Problem Observer, 2008

7K/8/N3N2B/1np5/2P5/1Bk5/P7/bn3Q2

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qc1#
    • 1...Bb2
      • 2.Qh3#
      • 2.Qf3#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qc2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...S1a3
        • 2.Qd2#
      • 1...S5a3
        • 2.Bg7#
      • 1...Sd4!
    • 1.Qd1?
      • threat
        • 2.Qc2#
      • 1...Kb2
        • 2.Qc1#
      • 1...S1a3
        • 2.Qd2#
      • 1...S5a3
        • 2.Bg7#
      • 1...Sd4!
    • 1.Qe1+?
      • 1...Kb2
        • 2.Bc1#
        • 2.Qc1#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Kd3+!
  • Keys
    • 1.Sexc5!
      • 1...Kb2
        • 2.Qc1#
      • 1...Kd4
        • 2.Qf6#
      • 1...Sd2
        • 2.Qxa1#
      • 1...Bb2
        • 2.Qd3#
      • 1...S1a3
        • 2.Qxa1#
      • 1...S5a3
        • 2.Qf6#
      • 1...Sd4
        • 2.Sa4#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sa7
        • 2.Qf6#
      • 1...Sc7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD::QAB1(A)
        • S(d);N_GUARD::B(G)
      • Refutation
        • S(d);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(d);N_GUARD::B(G)
      • Refutation
        • S(d);
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • K(c);CHECK,P-FLIGHT
  • Actual
    • S(F);XP(e)
    • Vars
      • K(c);S_FLIGHT::QAB1(A)
      • K(c);S_FLIGHT::QAB(A)
      • S(b);OGATE::QAB(A),XB(a)
      • B(a);SBLOCK::QAR1(A)
      • S(d);N_GUARD::QAB(A)
      • S(d);SBLOCK::S(F)
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