MESON Chess Problem Database

Problem Display
PID: 109127 (nr2b3/r3B2q/2PN4/4R3/pkp1N1Rp/1p5K/2P5/Qn2b3 w - - 0 1)

Pape, Edouard

Sports Referee, 1933

nr2b3/r3B2q/2PN4/4R3/pkp1N1Rp/1p5K/2P5/Qn2b3

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Sb7#
    • 1...Qf5
      • 2.Sb7#
    • 1...Qg8
      • 2.Sb7#
    • 1...Qh5
      • 2.Sb7#
    • 1...Qh8
      • 2.Sb7#
    • 1...Ra6
      • 2.Sf7#
    • 1...Rb5
      • 2.Rxb5#
    • 1...Rc8
      • 2.Rb5#
    • 1...Rd8
      • 2.Rb5#
    • 1...Bd7
      • 2.Sf7#
    • 1...Bf7
      • 2.Sb7#
    • 1...Sd2
      • 2.c3#
    • 1...Sb6
      • 2.Rb5#
    • 1...Sc7
      • 2.Sf7#
    • 1...bxc2
      • 2.Qb2#
    • 1...b2
      • 2.Qxb2#
  • Tries
    • 1.Qxa4+?
      • 1...Rxa4
        • 2.Sf7#
      • 1...Kxa4!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Rxc4#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qxc2
        • 2.Sb7#
      • 1...bxc2
        • 2.Qb2#
      • 1...Rb5
        • 2.Rxb5#
      • 1...Qe4
        • 2.Sb7#
      • 1...Qf5
        • 2.Sb7#
      • 1...Qg8
        • 2.Sd3#
        • 2.Sb7#
      • 1...Qf7
        • 2.Sd3#
      • 1...Bd7
        • 2.Sf7#
      • 1...Bf7
        • 2.Sb7#
      • 1...Sd2
        • 2.c3#
      • 1...Sa3
        • 2.Qxe1#
      • 1...Sb6
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD,XS(D)::B(I)+S(H)
    • Q(i);N_GUARD,P_PINR(E)::B(I)+S(H)
    • Q(i);N_GUARD::B(I)+S(H)
    • R(h);N_GUARD::B(I)+S(H)
    • R(k);N_GUARD::R1(F),XR(k)
    • R(k);N_GUARD::R1(F)
    • B(l);P_PINR(E),S_CUTR(h)::B(I)+S(H)
    • B(l);S_CUTQ(i)::B(I)+S(H)
    • S(a);N_GUARD,S_CUTB(b)::P(B)
    • S(j);S_CUTR(k)::R1(F)
    • S(j);S_CUTR(h)::B(I)+S(H)
    • P(c);OGATEB,XP(B)::QAR2(A)
    • P(c);OGATEB::QAR2(A),XP(c)
  • Tries
    • Try
      • Q(A);CHECK,XP(d)
      • Vars
        • R(h);SBLOCK,XQ(A)::B(I)+S(H)
      • Refutation
        • K(e);P-FLIGHT,XQ(A)
  • Actual
    • S(D);P_PINP(f)
    • Threat
      • R1(E),XP(f)
    • Vars
      • Q(i);CHECK,N_GUARD::S(D),XQ(i)
      • Q(i);N_GUARD,XP(B)::B(I)+S(H)
      • P(c);OGATEB,XP(B)::QAR2(A)
      • R(k);N_GUARD::R1(F),XR(k)
      • Q(i);N_GUARD,N_SPINP(f)::B(I)+S(H)
      • Q(i);N_GUARD,P_PINR(E)::B(I)+S(H)
      • Q(i);N_GUARD::S(D)
      • B(l);P_PINR(E),S_CUTR(h)::B(I)+S(H)
      • B(l);S_CUTQ(i)::B(I)+S(H)
      • S(a);N_GUARD,S_CUTB(b)::P(B)
      • S(a);OGATE,SBLOCK::QAB(A),XB(b)
      • S(j);S_CUTR(k)::R1(F)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).