MESON Chess Problem Database

Problem Display
PID: 137662 (8/Kp1n4/1p1QP3/b2p1pq1/N2k4/1P1N2P1/2P3R1/2BnR2B w - - 0 1)

Onkoud, Abdelaziz

Probleemblad, 1996

8/Kp1n4/1p1QP3/b2p1pq1/N2k4/1P1N2P1/2P3R1/2BnR2B

#2

12 + 9

102 Probleemblad 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qf6
      • 2.Qf4#
    • 1...Qe7
      • 2.Qf4#
    • 1...Qd8
      • 2.Qf4#
    • 1...Qh5
      • 2.Qf4#
    • 1...Qg6
      • 2.Qf4#
    • 1...Qg7
      • 2.Qf4#
    • 1...Qg8
      • 2.Qf4#
    • 1...Bb4
      • 2.Qxb4#
    • 1...Sc5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sf6
      • 2.Qe5#
    • 1...Sb8
      • 2.Qe5#
    • 1...Sf8
      • 2.Qe5#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Qxd5#
      • 1...Bxb4
        • 2.Qxb4#
      • 1...Se3
        • 2.Rd2#
      • 1...Sf6
        • 2.Qe5#
      • 1...f4
        • 2.Rd2#
      • 1...Sc3!
    • 1.Sf4?
      • threat
        • 2.Qxd5#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sf6
        • 2.Qe5#
      • 1...Se3!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Qxd5#
      • 1...Sc3
        • 2.Sf4#
      • 1...Se3
        • 2.Sb4#
      • 1...Sf6
        • 2.Qe5#
      • 1...f4
        • 2.Sb4#
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(f);N_GUARD::QAR2(J),XQ(f)
    • Q(f);N_GUARD::QAR2(J)
    • B(c);N_GUARD::QAR2(J),XB(c)
    • S(i);N_GUARD::QAB1(J)
    • S(i);N_GUARD::QAB1(J),XS(i)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR1(J),XP(d)
      • Vars
        • B(c);OGATE,XS(G)::QAR2(J),XB(c)
        • S(a);S_CUTQ(f)::R(E)
        • S(i);N_GUARD::QAB1(J)
        • P(e);S_CUTQ(f)::R(E)
      • Refutation
        • S(a);
    • Try
      • S(G);
      • Threat
        • QAR1(J),XP(d)
      • Vars
        • Q(f);OGATE,XS(G)::QAR2(J),XQ(f)
        • S(a);S_CUTB(c)::R(E)
        • S(i);N_GUARD::QAB1(J)
      • Refutation
        • S(a);
  • Actual
    • R(E);
    • Threat
      • QAR1(J),XP(d)
    • Vars
      • S(a);S_CUTB(c)::R(E)+S(G)
      • S(a);S_CUTQ(f)::R(E)+S(G)
      • S(i);N_GUARD::QAB1(J)
HTML5 logo

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).