MESON Chess Problem Database

Problem Display
PID: 21025 (4BBr1/ppRN2r1/1p2k1P1/b3P3/1N1P2P1/8/b2pQ3/1n1R1K2 w - - 0 1)

Pape, Edouard

Good Companions (October), 1915

4BBr1/ppRN2r1/1p2k1P1/b3P3/1N1P2P1/8/b2pQ3/1n1R1K2

#2

12 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.Bxd7#
    • 1...Rf7+
      • 2.Bxf7#
    • 1...Rxf8+
      • 2.Sxf8#
    • 1...Bc4
      • 2.Qxc4#
    • 1...b5
      • 2.Sc5#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qf5#
      • 1...Rf7+
        • 2.Bxf7#
      • 1...Rxf8+
        • 2.Sxf8#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bxb4!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Sc5#
      • 1...Rf7+
        • 2.Bxf7#
      • 1...Rxf8+
        • 2.Sxf8#
      • 1...Bc4+
        • 2.Qxc4#
      • 1...Rxd7
        • 2.Bxd7#
      • 1...Bxb4
        • 2.Qxa2#
      • 1...bxa6
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(i);OGATE,XS(J)::B(K),XR(i)
    • R(i);CHECK,N_GUARD::B(K),XR(i)
    • R(j);CHECK,XB(L)::S(J),XR(j)
    • B(b);N_GUARD,P_PINQ(C)::QAB(C),XB(b)
    • P(e);N_GUARD::S(J)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • R(i);CHECK,N_GUARD::B(K),XR(i)
        • R(j);CHECK,XB(L)::S(J),XR(j)
        • B(b);N_GUARD,P_PINQ(C)::QAB(C),XB(b)
      • Refutation
        • B(d);XS(D)
  • Actual
    • Q(C);P_PINP(e)
    • Threat
      • S(J)
    • Vars
      • R(i);CHECK,N_GUARD::B(K),XR(i)
      • R(j);CHECK,XB(L)::S(J),XR(j)
      • B(b);CHECK,N_GUARD::QAB(C),XB(b)
      • R(i);OGATE,XS(J)::B(K),XR(i)
      • B(d);OGATE,XS(D)::QAB(C),XB(b)
      • P(h);N_GUARD,N_SPINP(e),XQ(C)::R(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).