MESON Chess Problem Database

Problem Display
PID: 21677 (4K1n1/7Q/2Bp1p2/RN2k3/1r1p1r2/5pB1/4q3/4R2b w - - 0 1)

Pape, Edouard

Good Companions (July), 1920

4K1n1/7Q/2Bp1p2/RN2k3/1r1p1r2/5pB1/4q3/4R2b

#2

7 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Sc7#
    • 1...Qe4
      • 2.Rxe4#
      • 2.Qxe4#
  • Tries
    • 1.Sc7+?
      • 1...d5
        • 2.Rxd5#
      • 1...Rb5!
    • 1.Bxf4+?
      • 1...Ke6
        • 2.Sc7#
        • 2.Qd7#
      • 1...Kxf4+!
    • 1.Qh5+?
      • 1...Ke6
        • 2.Sc7#
        • 2.Bd5#
        • 2.Bd7#
        • 2.Qd5#
      • 1...f5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qf5#
      • 1...Qxb5+
        • 2.Bc6#
      • 1...Ke6
        • 2.Sc7#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...f5
        • 2.Qxf5#
      • 1...Sh6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(g);N_SPINR(f),P-FLIGHT::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • P(h);P_SPINP(h)::R1(C),XP(h)
      • Refutation
        • R(d);
    • Try
      • B(B);CHECK,XR(f)
      • Refutation
        • K(g);CHECK,N_SPINQ(b),S_FLIGHT,XB(B)
    • Try
      • Q(F);CHECK
      • Refutation
        • P(i);P_SPINP(i)
  • Actual
    • B(E);N_PINQ(b)
    • Threat
      • QAR1(F)
    • Vars
      • Q(b);CHECK,OGATEB,P_SPINQ(b),XS(D)::R(A)+B(E)
      • K(g);N_SPINR(f),P-FLIGHT::S(D)
      • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR1(F),XQ(b)
      • P(i);::QAR1(F),XP(i)
      • S(j);N_GUARD::QAR2(F)
      • S(j);N_GUARD::QAR2(F),XS(j)
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).