MESON Chess Problem Database

Problem Display
PID: 174766 (1r1nB1n1/Q5N1/Rb1q1k2/6p1/3p2p1/5N1p/1B6/1K2R3 w - - 0 1)

Zajic, Helmut

Problemas, 1989

1r1nB1n1/Q5N1/Rb1q1k2/6p1/3p2p1/5N1p/1B6/1K2R3

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Bxd4#
    • 1...Qf8
      • 2.Bxd4#
    • 1...Ba5
      • 2.Qxd4#
    • 1...Bc7
      • 2.Qxd4#
    • 1...Sc6
      • 2.Qf7#
    • 1...Se6
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
  • Tries
    • 1.Re5?
      • threat
        • 2.Sh5#
        • 2.Rf5#
      • 1...Bxa7
        • 2.Sh5#
      • 1...gxf3
        • 2.Rf5#
      • 1...Qc7
        • 2.Sh5#
      • 1...Qe7
        • 2.Sh5#
      • 1...Qd7
        • 2.Sh5#
      • 1...Rb7
        • 2.Sh5#
      • 1...Bc7
        • 2.Sh5#
      • 1...Sb7
        • 2.Sh5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Se7
        • 2.Sh5#
      • 1...Qc5
        • 2.Sh5#
      • 1...Qd5
        • 2.Sh5#
      • 1...Qe6
        • 2.Sh5#
      • 1...Sh6
        • 2.Sh5#
      • 1...Qxe5!
    • 1.Re6+?
      • 1...Sxe6
        • 2.Qf7#
      • 1...Qxe6!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.Sh5#
      • 1...Qxd4
        • 2.Bxd4#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Sf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD,P_SPINB(e)::B(C),XP(b)
    • B(e);OGATE,P_PINB(C),P_SPINQ(f)::QAB(F),XP(b)
    • S(i);N_GUARD::QAR1(F)
    • S(i);N_GUARD::QAR1(F),XS(i)
  • Tries
    • Try
      • R(B);N_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);P_PINB(C),P_SPINQ(f),XQ(F)::S(G)
        • P(c);XS(D)::R1(B)
        • Q(f);P_SPINB(e)::S(G)
        • R(h);::S(G)
        • B(e);P_PINB(C),P_SPINQ(f)::S(G)
        • S(i);::S(G)
        • S(i);N_GUARD::QAR1(F),XS(i)
        • S(j);::S(G)
        • Q(f);::S(G)
      • Refutation
        • Q(f);P_SPINB(e),XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • S(i);XR(B)::QAR1(F)
      • Refutation
        • Q(f);XR(B)
  • Actual
    • S(D);XP(b)
    • Threat
      • S(G)
    • Vars
      • Q(f);OGATE,P_SPINB(e),P_SPINQ(f),XS(D)::B(C),XQ(f)
      • B(e);OGATE,P_PINB(C),P_SPINB(e),P_SPINQ(f),XS(D)::QAB(F),XB(e)
      • S(i);N_GUARD::QAR1(F),XS(i)
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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).