MESON Chess Problem Database

Problem Display
PID: 274387 (1B4K1/4p2p/7N/2pR2pr/8/Rb3kPp/qp4rn/4Q2B w - - 0 1)

Sancho, Juan Antonio

Probleemblad, 1953

1B4K1/4p2p/7N/2pR2pr/8/Rb3kPp/qp4rn/4Q2B

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Rxb3#
    • 1...c4
      • 2.Rf5#
    • 1...e6
      • 2.Rd3#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sxh2#
        • 2.Se5#
      • 1...Kxg4
        • 2.Qe4#
      • 1...Sf1
        • 2.Se5#
      • 1...e5
        • 2.Sxh2#
        • 2.Sxe5#
      • 1...Sxg4!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Se5#
      • 1...Kg4
        • 2.Qe4#
      • 1...Sg4
        • 2.Rf5#
      • 1...g4
        • 2.Rd3#
      • 1...e5
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::R(C),XB(e)
    • P(h);N_PINR(E)::R(E)
    • P(k);N_PINR(E)::R(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(f);N_GUARD,N_SPINB(e),N_SPINR(c),S_FLIGHT,XS(F)::QAR2(A)
        • S(d);::S(F)
      • Refutation
        • S(d);XS(F)
  • Actual
    • S(F);N_SPINR(E)
    • Threat
      • S(F)
    • Vars
      • K(f);N_GUARD,N_SPINB(e),N_SPINR(c),S_FLIGHT::QAR2(A)
      • S(d);SBLOCK::R(E)
      • P(i);SBLOCK::R(E)
      • P(k);::S(F),XP(k)
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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).