MESON Chess Problem Database

Problem Display
PID: 101406 (4N2b/2NpK3/2p2p1Q/nR1Pk3/R2pb1P1/4r3/2prp1p1/B4q2 w - - 0 1)

Pape, Edouard

Good Companions (April), 1917

4N2b/2NpK3/2p2p1Q/nR1Pk3/R2pb1P1/4r3/2prp1p1/B4q2

#2

9 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qxe3#
    • 1...f5
      • 2.Qd6#
  • Tries
    • 1.dxc6+?
      • 1...Bd5
        • 2.Qxe3#
      • 1...d5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Bxd5
        • 2.Qxe3#
      • 1...Bd3
        • 2.Bxd4#
      • 1...Bf3
        • 2.Qh2#
      • 1...Bf5
        • 2.dxc6#
      • 1...Bg6
        • 2.dxc6#
      • 1...Bh7
        • 2.dxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(h);OGATEB,P_SPINB(h),XP(E)::QAR2(F),XR(f)
    • P(l);OGATE::QAB1(F)
  • Tries
    • Try
      • P(E);CHECK,XP(k)
      • Vars
        • B(h);P_SPINB(h),S_CUTP(m)::QAR2(F),XR(f)
      • Refutation
        • P(m);
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • B(h);OGATEB,P_SPINB(h),XP(E)::QAR2(F),XR(f)
      • B(h);S_CUTR(c)::B(A),XP(g)
      • B(h);S_CUTQ(a),S_CUTR(f)::QAB(F)
      • B(h);N_GUARD::R(D)+P(E),XP(k)
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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).