MESON Chess Problem Database

Problem Display
PID: 242619 (3nQ3/2Pr1P2/Np1p2K1/1Rb5/pr2p3/Nk3bR1/pPq5/n1BB4 w - - 0 1)

Casa, Alex

Sp. Prize, diagrammes, 2002

3nQ3/2Pr1P2/Np1p2K1/1Rb5/pr2p3/Nk3bR1/pPq5/n1BB4

#2

11 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Rxb4#
    • 1...Bf2
      • 2.Rxb4#
    • 1...Be3
      • 2.Rxb4#
    • 1...Bd4
      • 2.Rxb4#
  • Tries
    • 1.Qh8?
      • threat
        • 2.Qc3#
      • 1...Bd4
        • 2.Rxb4#
      • 1...e3+!
  • Keys
    • 1.Qxe4!
      • threat
        • 2.Qd3#
      • 1...Qxd1
        • 2.Qc4#
      • 1...Bd4
        • 2.Rxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(i);N_GUARD::R1(F),XR(g)
    • B(i);N_GUARD,N_SPINB(e)::R1(F),XR(g)
  • Tries
    • Try
      • Q(K);
      • Threat
        • QAR1(K)
      • Vars
        • B(i);N_GUARD::R1(F),XR(g)
      • Refutation
        • P(h);CHECK,N_SPINB(e)
  • Actual
    • Q(K);P_SPINQ(K),XP(h)
    • Threat
      • QAR2(K)
    • Vars
      • Q(c);N_PINQ(K),N_SPINQ(c),XB(B)::QAB1(K)
      • B(i);N_GUARD::R1(F),XR(g)
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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).