MESON Chess Problem Database

Problem Display
PID: 242396 (1K6/p1Q5/p4p2/P1pP1P2/8/PnkpNN2/PpP5/1R6 w - - 0 1)

Ben Jelloun, Youness

Einat, Paz

Variantim, 2015

1K6/p1Q5/p4p2/P1pP1P2/8/PnkpNN2/PpP5/1R6

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qxc5#
    • 1...Sc1
      • 2.Qxc5#
    • 1...Sd4
      • 2.Qxc5#
    • 1...Sxa5
      • 2.Qxa5#
    • 1...c4
      • 2.Qxc4#
  • Tries
    • 1.Qh2?
      • 1...Sxa5
        • 2.Qd2#
      • 1...dxc2
        • 2.Qxc2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sa1
        • 2.Qd2#
      • 1...Sc1
        • 2.Qd2#
      • 1...Sd4
        • 2.Qd2#
      • 1...c4
        • 2.Sd1#
      • 1...d2!
    • 1.Qb6?
      • threat
        • 2.Qxb3#
      • 1...Sxa5
        • 2.Qxa5#
        • 2.Qxb2#
        • 2.Qxf6#
      • 1...Sd2
        • 2.Qxb2#
        • 2.Qxf6#
      • 1...Sa1
        • 2.Qxc5#
        • 2.Qxb2#
        • 2.Qxf6#
      • 1...Sc1
        • 2.Qxc5#
        • 2.Qxb2#
        • 2.Qxf6#
      • 1...Sd4
        • 2.Qxc5#
        • 2.Qxb2#
      • 1...c4
        • 2.Qb4#
      • 1...axb6!
    • 1.axb3?
      • threat
        • 2.Qxc5#
      • 1...c4
        • 2.Qxc4#
      • 1...dxc2!
    • 1.cxb3?
      • threat
        • 2.Qxc5#
      • 1...c4
        • 2.Qxc4#
      • 1...d2!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxb3#
      • 1...Sxa5
        • 2.Qxb2#
      • 1...Sd2
        • 2.Qxb2#
      • 1...Sa1
        • 2.Qxb2#
      • 1...Sc1
        • 2.Qxb2#
      • 1...Sd4
        • 2.Qxb2#
      • 1...c4
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR2(J),XP(e)
    • S(b);OGATE,XP(G)::QAB(J),XS(b)
    • P(e);OGATE::QAR1(J),XP(e)
  • Tries
    • Try
      • Q(J);N_PINP(e)
      • Vars
        • S(b);N_GUARD,XP(G)::QAB1(J)
        • P(d);OGATE,XP(C)::QAR1(J),XP(d)
        • S(b);N_GUARD::QAB1(J),XS(b)
        • S(b);N_GUARD::QAB1(J)
        • P(e);SBLOCK::S(E)
      • Refutation
        • P(d);
    • Try
      • Q(J);N_PINP(e)
      • Threat
        • QAR1(J),XS(b)
      • Vars
        • P(e);N_GUARD::QAB1(J)
      • Refutation
        • P(h);XQ(J)
    • Try
      • P(B);XS(b)
      • Threat
        • QAR2(J),XP(e)
      • Vars
        • P(e);OGATE::QAR1(J),XP(e)
      • Refutation
        • P(d);XP(C)
    • Try
      • P(C);XS(b)
      • Threat
        • QAR2(J),XP(e)
      • Vars
        • P(e);OGATE::QAR1(J),XP(e)
      • Refutation
        • P(d);
  • Actual
    • Q(J);N_PINP(e)
    • Threat
      • QAR1(J),XS(b)
    • Vars
      • S(b);OGATE,XP(G)::QAB1(J),XP(a)
      • S(b);OGATE::QAB1(J),XP(a)
      • P(e);N_GUARD::QAB1(J)
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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).