MESON Chess Problem Database

Problem Display
PID: 184052 (BR6/3NN3/2n2p2/3P4/bpk5/1n3P2/1K2P3/6Q1 w - - 0 1)

Alexander, Frederick Forrest Lawrie

British Chess Magazine, 1915

BR6/3NN3/2n2p2/3P4/bpk5/1n3P2/1K2P3/6Q1

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Sb6#
    • 1...Sa1
      • 2.Qc5#
    • 1...Sc1
      • 2.Qc5#
    • 1...Sd2
      • 2.Qc5#
    • 1...Sba5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qd3#
      • 1...Sc1
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Se5!
    • 1.Qc1+?
      • 1...Kd4
        • 2.Qf4#
      • 1...Sxc1!
  • Keys
    • 1.Sf5!
      • 1...Kxd5
        • 2.Qg8#
      • 1...Sxb8
        • 2.Sd6#
      • 1...Bb5
        • 2.Sb6#
      • 1...Sa1
        • 2.Qc5#
      • 1...Sc1
        • 2.Qc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sbd4
        • 2.Se3#
      • 1...Sba5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Scd4
        • 2.Se3#
        • 2.Sd6#
      • 1...Sca5
        • 2.Sd6#
      • 1...Se5
        • 2.Sd6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...Sd8
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::S(F)
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • S(e);
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • S(G);
    • Vars
      • K(d);OGATEB,P_SPINS(e),S_FLIGHT,XP(E)::QAB(A)
      • S(e);XR(I)::S(G)
      • B(b);SBLOCK::S(F)
      • S(a);N_GUARD::QAR1(A)
      • S(a);SBLOCK::S(G)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(e);::S(G)
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