MESON Chess Problem Database

Problem Display
PID: 4826 (8/8/Q2N4/3pp3/1N6/1p2k1K1/1n2p3/2b1B3 w - - 0 1)

Blake, Percy Francis

The Chess Review, 1892

8/8/Q2N4/3pp3/1N6/1p2k1K1/1n2p3/2b1B3

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qb6#
      • 2.Qa7#
    • 1...Bd2
      • 2.Bf2#
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...d4
      • 2.Sd5#
    • 1...e4
      • 2.Sf5#
  • Tries
    • 1.Qb5?
      • 1...Kd4
        • 2.Qb6#
      • 1...Bd2
        • 2.Bf2#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...d4
        • 2.Sd5#
        • 2.Qxe5#
      • 1...e4
        • 2.Sf5#
      • 1...Sc4!
  • Keys
    • 1.Qa1!
      • 1...Kd4
        • 2.Qa7#
      • 1...Bd2
        • 2.Bf2#
      • 1...Sd1
        • 2.Qxe5#
      • 1...Sd3
        • 2.Sxd5#
      • 1...Sa4
        • 2.Qxe5#
      • 1...Sc4
        • 2.Qc3#
      • 1...d4
        • 2.Qxc1#
      • 1...e4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(A)
    • S(b);N_GUARD::QAR1(D)
    • S(b);N_GUARD::QAR1(D),XS(b)
    • P(f);SBLOCK::S(C)
    • P(g);SBLOCK::S(E)
  • Tries
    • Try
      • Q(D);
      • Vars
        • K(e);S_FLIGHT::QAB(D)
        • B(a);SBLOCK::B(A)
        • S(b);N_GUARD::QAR1(D)
        • S(b);N_GUARD::QAR1(D),XS(b)
        • P(g);SBLOCK::S(E)
      • Refutation
        • S(b);
  • Actual
    • Q(D);
    • Vars
      • K(e);P_SPINS(b),S_FLIGHT::QAB(D)
      • B(a);SBLOCK::B(A)
      • S(b);OGATE::QAR2(D),XP(g)
      • S(b);SBLOCK::S(C),XP(f)
      • S(b);OGATE::QAR2(D)
      • P(f);SBLOCK::QAB(D),XB(a)
      • P(g);SBLOCK::S(E)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).