MESON Chess Problem Database

Problem Display
PID: 109094 (R5R1/3BK3/3N4/3k4/p2P1pp1/1n3n2/1pN5/1Q6 w - - 0 1)

Onkoud, Abdelaziz

Telescacco 92, 1995

R5R1/3BK3/3N4/3k4/p2P1pp1/1n3n2/1pN5/1Q6

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Ra5#
    • 1...Sc1
      • 2.Ra5#
    • 1...Sbd2
      • 2.Ra5#
    • 1...Sa5
      • 2.Rxa5#
    • 1...Se1
      • 2.Rg5#
    • 1...Sg1
      • 2.Rg5#
    • 1...Sfd2
      • 2.Rg5#
    • 1...Sh2
      • 2.Rg5#
    • 1...Sg5
      • 2.Rxg5#
  • Tries
    • 1.Se3+?
      • 1...fxe3
        • 2.Qe4#
      • 1...Kxd4!
    • 1.Ra5+?
      • 1...Sc5
        • 2.Rxc5#
        • 2.Qa2#
      • 1...Sxa5!
    • 1.Rg5+?
      • 1...Se5
        • 2.Rxe5#
      • 1...Sxg5!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sb4#
      • 1...Sbxd4
        • 2.Ra5#
      • 1...Sfxd4
        • 2.Rg5#
      • 1...Sbd2
        • 2.Ra5#
      • 1...Sfd2
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • S(b);N_GUARD::R(G)
    • S(b);N_GUARD::R(G),XS(b)
    • S(c);N_GUARD::R(H)
    • S(c);N_GUARD::R(H),XS(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(e);XS(B)::QAB1(A)
      • Refutation
        • K(g);P-FLIGHT,XP(C)
    • Try
      • R(G);CHECK
      • Refutation
        • S(b);XR(G)
    • Try
      • R(H);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(H),XS(c)
      • Refutation
        • S(c);XR(H)
  • Actual
    • Q(A);
    • Threat
      • S(B)
    • Vars
      • S(b);N_GUARD,P_SPINS(b),XP(C)::R(G)
      • S(c);N_GUARD,P_SPINS(c),XP(C)::R(H)
      • S(b);N_GUARD::R(G)
      • S(c);N_GUARD::R(H)
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).