MESON Chess Problem Database

Problem Display
PID: 84963 (NQ1N3b/p6r/6r1/kPP1p3/p1B5/K1p5/3R2b1/4B3 w - - 0 1)

Petite, Efren

diagrammes, 1990

NQ1N3b/p6r/6r1/kPP1p3/p1B5/K1p5/3R2b1/4B3

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...cxd2
      • 2.Bxd2#
    • 1...c2
      • 2.Rd1#
      • 2.Rxc2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rxg2#
      • 2.Rd3#
      • 2.Rd4#
      • 2.Rd5#
      • 2.Rd6#
      • 2.Rd7#
  • Tries
    • 1.Rxg2?
      • threat
        • 2.Bxc3#
      • 1...Rg3
        • 2.Sc6#
      • 1...Rh3
        • 2.Sb7#
      • 1...e4!
    • 1.Rd5?
      • threat
        • 2.Bxc3#
      • 1...Rg3
        • 2.Sc6#
      • 1...Rh3
        • 2.Sb7#
      • 1...e4!
    • 1.Rd7?
      • threat
        • 2.Bxc3#
      • 1...Rg3
        • 2.Qxa7#
        • 2.Qc7#
      • 1...e4
        • 2.Sb7#
      • 1...Rh3!
    • 1.Qxa7+?
      • 1...Ra6
        • 2.Qxa6#
      • 1...Rxa7!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Bxc3#
      • 1...Rg3
        • 2.Ra6#
      • 1...Rh3
        • 2.Qxa7#
        • 2.Qc7#
      • 1...e4
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE,P_SPINP(b),XR(B)::B(A),XP(b)
  • Tries
    • Try
      • R(B);P_PINP(b),XB(a)
      • Threat
        • B(A),XP(b)
      • Vars
        • R(f);N_GUARD::S(I)
        • R(h);N_GUARD,SBLOCK::S(I)
      • Refutation
        • P(e);
    • Try
      • R(B);P_PINP(b)
      • Threat
        • B(A),XP(b)
      • Vars
        • R(f);N_GUARD::S(I)
        • R(h);N_GUARD,SBLOCK::S(I)
      • Refutation
        • P(e);
    • Try
      • R(B);P_PINP(b)
      • Threat
        • B(A),XP(b)
      • Vars
        • P(e);S_CUTB(a)::S(I)
      • Refutation
        • R(h);
    • Try
      • Q(H);CHECK,XP(g)
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(H),XR(f)
      • Refutation
        • R(h);XQ(H)
  • Actual
    • R(B);P_PINP(b)
    • Threat
      • B(A),XP(b)
    • Vars
      • R(f);N_GUARD::R1(B)
      • P(e);S_CUTB(a)::S(I)
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).