MESON Chess Problem Database

Problem Display
PID: 33698 (2n5/8/1pp1R3/3kpP2/3Pp3/1K2p3/8/3Q4 w - - 0 1)

Onkoud, Abdelaziz

The Problemist, 2001

2n5/8/1pp1R3/3kpP2/3Pp3/1K2p3/8/3Q4

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Rxe5#
    • 1...c5
      • 2.dxe5#
  • Tries
    • 1.Kb4?
      • threat
        • 2.dxe5#
      • 1...c5+
        • 2.dxc5#
      • 1...exd4
        • 2.Qb3#
      • 1...e2!
    • 1.Qc2?
      • threat
        • 2.Qc4#
      • 1...Kxd4
        • 2.Qc4#
      • 1...b5
        • 2.Qc5#
      • 1...Sd6!
    • 1.Qc1?
      • threat
        • 2.Qc4#
      • 1...Kxd4
        • 2.Qc4#
      • 1...b5
        • 2.Qc5#
      • 1...Sd6!
  • Keys
    • 1.Kc3!
      • threat
        • 2.Qb3#
      • 1...exd4+
        • 2.Qxd4#
      • 1...Sd6
        • 2.Rxe5#
      • 1...c5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(g);SBLOCK::R1(E),XP(d)
    • P(f);SBLOCK::QAR(A)+P(C),XP(d)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR(A)+P(C),XP(d)
      • Vars
        • P(f);CHECK,OGATE::QAR(A)+P(C),XP(f)
        • P(d);P_SPINP(d),SBLOCK,XP(C)::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT,XP(C)::QAR1(A)
        • P(e);N_GUARD::QAR1(A)
      • Refutation
        • S(g);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT,XP(C)::QAR1(A)
        • P(e);N_GUARD::QAR1(A)
      • Refutation
        • S(g);
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • QAB(A)
    • Vars
      • P(d);CHECK,OGATE,P_SPINP(d),XP(C)::QAR1(A),XP(d)
      • S(g);SBLOCK::R1(E),XP(d)
      • P(f);SBLOCK::QAR(A)+P(C),XP(d)
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).