MESON Chess Problem Database

Problem Display
PID: 617 (4n1N1/8/2K1p3/2N1k2p/1B2Pn2/5R2/1b6/6Q1 w - - 0 1)

Blake, Percy Francis

British Chess Magazine, 1891

4n1N1/8/2K1p3/2N1k2p/1B2Pn2/5R2/1b6/6Q1

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qxa1#
    • 1...Bc1
      • 2.Bc3#
    • 1...Ba3
      • 2.Bc3#
    • 1...Bc3
      • 2.Bxc3#
    • 1...Bd4
      • 2.Qg5#
    • 1...Sd6
      • 2.Qg7#
    • 1...Sc7
      • 2.Qg7#
    • 1...Sg7
      • 2.Qxg7#
  • Tries
    • 1.Qg7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sxg7!
  • Keys
    • 1.Sh6!
      • 1...Kf6
        • 2.Sd7#
      • 1...Ba1
        • 2.Qxa1#
      • 1...Bc1
        • 2.Bc3#
      • 1...Ba3
        • 2.Bc3#
      • 1...Bc3
        • 2.Bxc3#
      • 1...Bd4
        • 2.Qg5#
      • 1...Se2
        • 2.Sf7#
      • 1...Sg2
        • 2.Sf7#
      • 1...Sd3
        • 2.Sf7#
      • 1...Sh3
        • 2.Sf7#
      • 1...Sd5
        • 2.Sf7#
      • 1...Sg6
        • 2.Sf7#
      • 1...Sd6
        • 2.Qg7#
      • 1...Sf6
        • 2.Sf7#
      • 1...Sc7
        • 2.Qg7#
      • 1...Sg7
        • 2.Qxg7#
      • 1...h4
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATEB::QAB(A),XB(a)
    • B(a);N_GUARD::B(C)
    • B(a);N_GUARD::B(C),XB(a)
    • B(a);SBLOCK::QAR2(A)
    • S(f);N_GUARD::QAB(A)
    • S(f);N_GUARD::QAB(A),XS(f)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(A),XS(f)
      • Refutation
        • S(f);XQ(A)
  • Actual
    • S(G);
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::S(E)
      • B(a);OGATEB::QAB(A),XB(a)
      • B(a);N_GUARD::B(C)
      • B(a);N_GUARD::B(C),XB(a)
      • B(a);SBLOCK::QAR2(A)
      • S(b);::S(G)
      • S(f);N_GUARD::QAB(A)
      • S(f);SBLOCK::S(G)
      • S(f);N_GUARD::QAB(A),XS(f)
      • P(d);N_GUARD::S(G)
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Developed and maintained by Brian Stephenson.
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