MESON Chess Problem Database

Problem Display
PID: 10146 (3b1B2/2pQnPK1/1p1N4/3k4/2R2pN1/3q1P2/8/1b1R4 w - - 0 1)

Lender, Baruch

2nd Place, Israel Ring Ty., 1962/II

3b1B2/2pQnPK1/1p1N4/3k4/2R2pN1/3q1P2/8/1b1R4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4+
      • 2.Rdxd4#
    • 1...Ba2
      • 2.Rxd3#
    • 1...Sf5+
      • 2.Qxf5#
    • 1...Sc8
      • 2.Qf5#
    • 1...Sg8
      • 2.Qf5#
      • 2.fxg8Q#
      • 2.fxg8B#
  • Tries
    • 1.Qxe7?
      • threat
        • 2.Sf6#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Qd4+
        • 2.Sf6#
        • 2.Rdxd4#
        • 2.Qe5#
      • 1...Qxd1
        • 2.Sf6#
        • 2.Qe5#
      • 1...cxd6
        • 2.Qe4#
      • 1...c5
        • 2.Qe4#
      • 1...Qd2
        • 2.Sf6#
        • 2.Qe5#
      • 1...Bxe7!
  • Keys
    • 1.Re4!
      • threat
        • 2.Sb7#
      • 1...Qd4+
        • 2.Re5#
      • 1...Sf5+
        • 2.Sxf5#
      • 1...Kc5
        • 2.Sb7#
      • 1...cxd6
        • 2.Qb5#
      • 1...Sc8
        • 2.Sxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,OGATE::R1(A),XQ(b)
    • B(a);N_GUARD::R(A),XQ(b)
    • S(g);CHECK,N_GUARD::QAR2(F),XS(g)
    • S(g);N_GUARD::QAR2(F)
  • Tries
    • Try
      • Q(F);XS(g)
      • Threat
        • DUALS(3)
      • Vars
        • P(f);XS(E)::QAB1(F)
        • P(f);::QAB1(F)
      • Refutation
        • B(h);XQ(F)
  • Actual
    • R(C);
    • Threat
      • QAR(F)+S(E)
    • Vars
      • Q(b);CHECK::R1(C)
      • S(g);CHECK::QAR(F)+S(E),XS(g)
      • K(d);N_SPINQ(b),P-FLIGHT::S(E)
      • P(f);N_GUARD,P_SPINP(f),SBLOCK,XS(E)::QAR2(F)
      • S(g);::QAR(F)+S(E),XS(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).