MESON Chess Problem Database

Problem Display
PID: 124471 (8/6B1/2Kp4/Q2pr1p1/3N1pR1/1P2k3/p1B1P3/rn5N w - - 0 1)

Orsini, Emilio

Neopolitan Ty., 1886

8/6B1/2Kp4/Q2pr1p1/3N1pR1/1P2k3/p1B1P3/rn5N

#2

9 + 9

4901 Best Problems 2008
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qc3#
    • 1...Sa3
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qd3#
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd2!
    • 1.Qa6?
      • threat
        • 2.Qd3#
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd2!
  • Keys
    • 1.Qe1!
      • 1...Kxd4
        • 2.e3#
      • 1...Re4
        • 2.Sf5#
      • 1...Rf5
        • 2.Sxf5#
      • 1...Re6
        • 2.Sf5#
      • 1...Re7
        • 2.Sf5#
      • 1...Re8
        • 2.Sf5#
      • 1...Sd2
        • 2.Qf2#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...f3
        • 2.exf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR2(G)
    • S(b);N_GUARD::QAR2(G),XS(b)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(d);P_SPINP(e),P_SPINR(g),S_FLIGHT,XS(E)::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(d);P_SPINP(e),P_SPINR(g),S_FLIGHT,XS(E)::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(d);OGATE,P_SPINP(e),P_SPINR(g),S_FLIGHT,XS(E)::P(C)
      • R(g);N_GUARD::S(E)
      • R(g);N_GUARD::S(E),XR(g)
      • S(b);SBLOCK::QAB1(G)
      • S(b);N_GUARD::QAR2(G)
      • S(b);N_GUARD::QAR2(G),XS(b)
      • P(e);OGATE::QAR(G)+P(C),XP(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).