MESON Chess Problem Database

Problem Display
PID: 23672 (8/1N2p1K1/4R3/8/1N1k1p2/Q2B1b2/1n1pP1nB/2br4 w - - 0 1)

Blake, Percy Francis

Manchester Times, 1902

8/1N2p1K1/4R3/8/1N1k1p2/Q2B1b2/1n1pP1nB/2br4

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2
      • 2.Re4#
    • 1...Be4
      • 2.Rxe4#
    • 1...Bg4
      • 2.Re4#
    • 1...Bd5
      • 2.Sc2#
    • 1...Bh5
      • 2.Re4#
    • 1...Sxd3
      • 2.Qxd3#
    • 1...Se1
      • 2.Bg1#
  • Tries
    • 1.Sc6+?
      • 1...Bxc6
        • 2.Qc5#
      • 1...Kd5!
    • 1.e3+?
      • 1...fxe3
        • 2.Be5#
      • 1...Sxe3!
  • Keys
    • 1.e4!
      • threat
        • 2.Sc2#
      • 1...Ke3
        • 2.Qa7#
      • 1...Bxe4
        • 2.Rxe4#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...fxe4 ep
        • 2.Be5#
      • 1...Se1
        • 2.Bg1#
      • 1...Se3
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(f);N_GUARD,XP(A)::R1(F)
    • B(f);N_GUARD::R1(F),XB(f)
    • B(f);N_GUARD::R1(F)
    • B(f);SBLOCK::S(E)
    • S(c);OGATE,XB(D)::QAR1(C),XS(c)
    • S(e);N_GUARD,S_CUTR(b)::B(B)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(f);XS(E)::QAB1(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • P(h);OGATE,SBLOCK,XP(A)::B(B)
      • Refutation
        • S(e);XP(A)
  • Actual
    • P(A);
    • Threat
      • S(E)
    • Vars
      • K(g);S_FLIGHT::QAB(C)
      • B(f);OGATE,XP(A)::R1(F),XB(f)
      • S(c);OGATE,XB(D)::QAR1(C),XS(c)
      • P(h);EP,OGATE,XP(A)::B(B)
      • S(e);N_GUARD,S_CUTR(b)::B(B)
      • S(e);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).