MESON Chess Problem Database

Problem Display
PID: 186170 (8/2b1N1Q1/qn2p3/1n2rp2/RB1k4/1P6/4pP1K/1B2N2b w - - 0 1)

Plant, G

Birmingham Daily Post, 1920

8/2b1N1Q1/qn2p3/1n2rp2/RB1k4/1P6/4pP1K/1B2N2b

#2

9 + 10

136 Problem Observer 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Sxf3#
  • Tries
    • 1.Bd6+?
      • 1...Qxa4
        • 2.Qxe5#
      • 1...Sxa4
        • 2.Qxe5#
      • 1...Sc4
        • 2.Rxc4#
        • 2.Qxe5#
      • 1...Kc3!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qd3#
      • 1...Be4
        • 2.Qe3#
      • 1...Re3
        • 2.fxe3#
      • 1...Re4
        • 2.Sc2#
      • 1...Rc5
        • 2.Bc3#
      • 1...Rd5
        • 2.Sc6#
      • 1...Bf3
        • 2.Sxf3#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd6
        • 2.Qc3#
      • 1...Sa7
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::S(B),XB(a)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • Q(g);XR(F)::QAB1(I),XR(e)
        • S(h);XR(F)::QAB1(I),XR(e)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(I);N_PINR(e)
    • Threat
      • QAR1(I)
    • Vars
      • B(a);S_CUTR(e)::QAB1(I)
      • R(e);OGATE,P_PINQ(I)::P(C),XR(e)
      • R(e);P_PINQ(I),SBLOCK::S(B)
      • R(e);P_PINQ(I),SBLOCK::R(F)+B(G),DCHECK
      • R(e);P_PINQ(I),SBLOCK,S_CUTB(a)::S(H)
      • B(a);N_GUARD::S(B),XB(a)
      • S(d);N_GUARD::QAB1(I)
      • S(d);N_GUARD::QAB1(I),XS(d)
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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).