MESON Chess Problem Database

Problem Display
PID: 80984 (8/1p1Np3/4K3/p4B2/Rbnk1pNQ/1R3p2/8/3rn3 w - - 0 1)

Hirschenson, Aaron

2nd Prize, Mat Plus Challenge No. 1, 1998

8/1p1Np3/4K3/p4B2/Rbnk1pNQ/1R3p2/8/3rn3

#2

7 + 10

5929 Mat Plus Special Issue 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qh8#
    • 1...Ba3
      • 2.Qf2#
      • 2.Qh8#
    • 1...Bc3
      • 2.Qf2#
      • 2.Qh8#
    • 1...Bc5
      • 2.Qf2#
      • 2.Qh8#
    • 1...Bd6
      • 2.Qf2#
  • Tries
    • 1.Sge5?
      • threat
        • 2.Qxf4#
      • 1...Bd2
        • 2.Rxc4#
      • 1...Sg2
        • 2.Sxf3#
      • 1...Sd2
        • 2.Qf2#
      • 1...Sd6
        • 2.Qf2#
      • 1...Sd3!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qxf4#
      • 1...Sd3
        • 2.Sc2#
      • 1...Bd6
        • 2.Rxc4#
      • 1...Sg2
        • 2.Sc2#
      • 1...Sd2
        • 2.Qh8#
      • 1...Sd6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(d);P_SPINS(e)::QAB(D)
  • Tries
    • Try
      • S(C);P_PINP(g)
      • Threat
        • QAR2(D),XP(g)
      • Vars
        • B(d);OGATE,P_SPINS(e)::R1(B),XS(e)
        • S(b);N_GUARD::S(C),XP(c)
        • S(e);N_GUARD,P_SPINB(d)::QAB(D)
      • Refutation
        • S(b);
  • Actual
    • S(C);P_PINP(g)
    • Threat
      • QAR2(D),XP(g)
    • Vars
      • S(b);N_GUARD::S(C)
      • B(d);OGATE,P_SPINS(e)::R1(B),XS(e)
      • S(e);N_GUARD,P_SPINB(d)::QAB(D)
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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).