MESON Chess Problem Database

Problem Display
PID: 193982 (8/4Q1P1/B5pr/3p3q/3kp1pR/3pN1P1/1P1R1P2/nn2K3 w - - 0 1)

Berkel, Adrian V

Brisbane Courier, 1916

8/4Q1P1/B5pr/3p3q/3kp1pR/3pN1P1/1P1R1P2/nn2K3

#2

10 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qb4#
      • 2.Qa7#
    • 1...Sc2+
      • 2.Sxc2#
    • 1...Sb3
      • 2.Sc2#
    • 1...g5
      • 2.Sf5#
  • Tries
    • 1.Rxh5?
      • threat
        • 2.Rxd5#
        • 2.Qb4#
        • 2.Qa7#
      • 1...Sc2+
        • 2.Sxc2#
      • 1...Sxd2
        • 2.Rxd5#
        • 2.Qa7#
      • 1...gxh5
        • 2.Sf5#
      • 1...Sb3
        • 2.Sc2#
        • 2.Rxd5#
        • 2.Qb4#
      • 1...Sa3
        • 2.Rxd5#
        • 2.Qa7#
      • 1...Sc3
        • 2.Qb4#
        • 2.Qa7#
      • 1...g5
        • 2.Sf5#
      • 1...Rxh5!
    • 1.Qf6+?
      • 1...Qe5
        • 2.Qb6#
      • 1...Kc5!
  • Keys
    • 1.f4!
      • threat
        • 2.Qa7#
      • 1...Sc2+
        • 2.Sxc2#
      • 1...Kxe3
        • 2.Rxd3#
      • 1...exf4 ep
        • 2.Rxd3#
      • 1...gxf4 ep
        • 2.Rxd3#
      • 1...Sb3
        • 2.Sc2#
      • 1...g5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,N_GUARD::S(E),XS(a)
    • S(a);N_GUARD::S(E)
    • P(i);N_GUARD,S_CUTQ(h)::S(E)
  • Tries
    • Try
      • R(G);XQ(h)
      • Threat
        • DUALS(3)
      • Vars
        • S(a);CHECK,N_GUARD::S(E),XS(a)
        • P(i);N_GUARD,XR(G)::S(E)
        • P(i);N_GUARD::S(E)
      • Refutation
        • R(j);XR(G)
    • Try
      • Q(I);CHECK
      • Vars
        • Q(h);P_SPINQ(h),SBLOCK::QAB(I)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
  • Actual
    • P(D);
    • Threat
      • QAB(I)
    • Vars
      • S(a);CHECK,N_GUARD::S(E),XS(a)
      • K(d);N_SPINP(c),P_SPINP(e),S_FLIGHT,XS(E)::R1(C),XP(c)
      • P(e);EP,N_GUARD,XP(D)::R1(C),XP(c)
      • P(f);EP,S_CUTP(e),XP(D)::R1(C),XP(c)
      • S(a);N_GUARD::S(E)
      • P(i);N_GUARD,S_CUTQ(h)::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).