MESON Chess Problem Database

Problem Display
PID: 242620 (3nQ3/2Pr1P2/N2p4/pRb5/pr2p2K/Nk3bR1/pPq5/n1BB4 w - - 0 1)

Casa, Alex

Sp. Prize, diagrammes, 2002

3nQ3/2Pr1P2/N2p4/pRb5/pr2p2K/Nk3bR1/pPq5/n1BB4

#2

11 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Sxc5#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qc3#
        • 2.Qd5#
      • 1...Qxd1
        • 2.Qc3#
      • 1...dxe5
        • 2.Sxc5#
      • 1...Bd4
        • 2.Qd5#
      • 1...d5
        • 2.Sxc5#
        • 2.Qc3#
      • 1...e3+!
    • 1.Qe6+?
      • 1...d5
        • 2.Sxc5#
      • 1...Sxe6!
  • Keys
    • 1.Qxe4!
      • threat
        • 2.Qc4#
      • 1...Bd4
        • 2.Qd5#
      • 1...d5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(k);N_GUARD::S(H),XB(j)
  • Tries
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_SPINQ(c),XB(B)::QAR1(K)
        • P(k);N_GUARD,XQ(K)::S(H),XB(j)
        • B(j);::QAB(K)
      • Refutation
        • P(h);CHECK,N_SPINB(e)
    • Try
      • Q(K);CHECK
      • Vars
        • P(k);P_SPINP(k)::S(H),XB(j)
      • Refutation
        • S(m);XQ(K)
  • Actual
    • Q(K);P_SPINQ(K),XP(h)
    • Threat
      • QAB1(K)
    • Vars
      • B(j);N_PINQ(K)::QAB(K)
      • P(k);N_GUARD::S(H),XB(j)
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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).