MESON Chess Problem Database

Problem Display
PID: 152037 (1b2nr1q/p7/B7/3p4/3Q4/1N1P1P2/3Bk3/K4R1N w - - 0 1)

Dobbs, Gilbert S

3rd Prize, Good Companions (February), 1915

1b2nr1q/p7/B7/3p4/3Q4/1N1P1P2/3Bk3/K4R1N

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh1
      • 2.Qf2#
    • 1...Qh3
      • 2.Qf2#
    • 1...Qh5
      • 2.Qf2#
    • 1...Qh6
      • 2.Qf2#
    • 1...Qh7
      • 2.Qf2#
    • 1...Qg8
      • 2.Qf2#
    • 1...Rxf3
      • 2.Re1#
    • 1...Rf4
      • 2.Sg3#
    • 1...Rf6
      • 2.Qf2#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Sd6
      • 2.Sg3#
    • 1...Sf6
      • 2.Qf2#
    • 1...Sc7
      • 2.Sg3#
    • 1...Sg7
      • 2.Qf2#
  • Tries
    • 1.Qe5+?
      • 1...Qxe5+
        • 2.d4#
      • 1...Bxe5+
        • 2.d4#
      • 1...Kxf1!
  • Keys
    • 1.Qg7!
      • threat
        • 2.d4#
      • 1...Kxf1
        • 2.d4#
      • 1...Rxf3
        • 2.Re1#
      • 1...Qh6
        • 2.Qg2#
      • 1...Qh7
        • 2.Qg2#
      • 1...Rf6
        • 2.Qg2#
      • 1...Sd6
        • 2.Sg3#
      • 1...Sc7
        • 2.Sg3#
      • 1...d4
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_PINQ(H),P_PINR(B),XS(C)::QAR1(H)
    • Q(g);N_PINQ(H)::QAR1(H)
    • R(f);SBLOCK,XP(G)::R1(B)
    • R(f);S_CUTB(d)::S(C)
    • R(f);N_PINQ(H)::QAR1(H)
    • B(d);N_GUARD::S(C),XB(d)
    • S(e);S_CUTB(d)::S(C)
    • S(e);N_PINQ(H)::QAR1(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • Q(g);CHECK,XQ(H)::B(I)+P(F)
        • B(d);CHECK,XQ(H)::B(I)+P(F)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(H);
    • Threat
      • B(I)+P(F)
    • Vars
      • K(a);S_FLIGHT,XR(B)::B(I)+P(F)
      • R(f);SBLOCK,XP(G)::R1(B)
      • Q(g);N_PINQ(H)::QAR2(H)
      • R(f);N_PINQ(H)::QAR2(H)
      • S(e);S_CUTB(d)::S(C)
      • P(b);N_PINQ(H)::QAR2(H)
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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).