MESON Chess Problem Database

Problem Display
PID: 77244 (8/N7/n2PR3/Rp1k1P2/2r1n2K/5Q1p/B3Np2/1b1r4 w - - 0 1)

Pape, Edouard

2nd Prize, Match: France - Spain, 1936

8/N7/n2PR3/Rp1k1P2/2r1n2K/5Q1p/B3Np2/1b1r4

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rxb5#
    • 1...Sb4
      • 2.Rxb5#
    • 1...Sb8
      • 2.Rxb5#
  • Tries
    • 1.Qxe4+?
      • 1...Kc5
        • 2.Rxb5#
      • 1...Bxe4!
    • 1.Qxf2?
      • threat
        • 2.Sf4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Sxf2+!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Rxb5#
      • 1...Sxd6
        • 2.Re5#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sc3
        • 2.Qxc4#
      • 1...Sg3
        • 2.Qxc4#
      • 1...Sec5
        • 2.Sc3#
      • 1...Sg5
        • 2.Qxc4#
      • 1...Sf6
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • K(h);N_SPINR(e),N_SPINS(f),P-FLIGHT::R1(E),XP(g)
    • S(i);N_GUARD::R(E),XP(g)
  • Tries
    • Try
      • Q(C);CHECK,P_SPINQ(C),XS(f)
      • Vars
        • K(h);N_SPINR(e),P-FLIGHT::R1(E),XP(g)
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);N_PINS(f),XP(c)
      • Threat
        • S(B)
      • Vars
        • R(b);N_GUARD::QAR1(C),XR(b)
      • Refutation
        • S(f);CHECK,XQ(C)
  • Actual
    • Q(C);N_PINS(f)
    • Threat
      • QAR1(C)
    • Vars
      • K(h);N_SPINR(e),P-FLIGHT::R1(E),XP(g)
      • S(f);P_PINQ(C),SBLOCK,XP(G)::R1(H)
      • S(f);OGATE,P_PINQ(C)::QAR1(C)
      • S(f);OGATE,P_PINQ(C)::QAB1(C),XR(e)
      • S(f);N_GUARD,N_SPINP(g),P_PINQ(C),SBLOCK::S(B)
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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).