MESON Chess Problem Database

Problem Display
PID: 57871 (8/5b2/3N4/1P1k1P2/Kp6/pN1P1pB1/3b3Q/2r1r3 w - - 0 1)

Petite, Efren

Chess Life, 1958

8/5b2/3N4/1P1k1P2/Kp6/pN1P1pB1/3b3Q/2r1r3

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.dxc4#
    • 1...Re4
      • 2.dxe4#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qd4#
      • 1...Rc4
        • 2.dxc4#
      • 1...Re4
        • 2.dxe4#
      • 1...Bc3
        • 2.Qc5#
      • 1...Be3
        • 2.Qxf3#
      • 1...Re3!
    • 1.Qh4?
      • threat
        • 2.Qd4#
      • 1...Rc4
        • 2.Qxc4#
        • 2.dxc4#
      • 1...Re4
        • 2.Qxe4#
        • 2.dxe4#
      • 1...Bc3
        • 2.Qc4#
      • 1...Be3
        • 2.Qe4#
      • 1...Bf4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qd4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rc4
        • 2.dxc4#
      • 1...Re4
        • 2.dxe4#
      • 1...Bc3
        • 2.Qa8#
      • 1...Be3
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE::P(C),XR(a)
    • R(b);OGATE::P(C),XR(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);OGATE::P(C),XR(a)
        • R(b);OGATE::P(C),XR(b)
        • B(c);S_CUTR(a)::QAR1(A)
        • B(c);S_CUTR(b)::QAB(A),XP(e)
      • Refutation
        • R(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);S_CUTR(a)::QAB1(A)
        • B(c);S_CUTR(b)::QAB1(A)
      • Refutation
        • B(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(b);N_GUARD::QAR1(A),XR(b)
      • R(a);OGATE::P(C),XR(a)
      • R(b);OGATE::P(C),XR(b)
      • B(c);S_CUTR(a)::QAB(A)
      • B(c);S_CUTR(b)::QAR1(A)
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).