MESON Chess Problem Database

Problem Display
PID: 244442 (K5B1/8/2p2Bnb/3p1R2/p2Nk3/r3P1P1/2P3p1/3NR1q1 w - - 0 1)

Eerkes, Allard Pieter

Tijdschrift vd KNSB, 1936

K5B1/8/2p2Bnb/3p1R2/p2Nk3/r3P1P1/2P3p1/3NR1q1

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Sxf2#
    • 1...Qh2
      • 2.Sf2#
    • 1...Qxe3
      • 2.Sf2#
    • 1...Qh1
      • 2.Sf2#
    • 1...Ra1
      • 2.Sc3#
    • 1...Ra2
      • 2.Sc3#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rxe3
      • 2.Sc3#
    • 1...Sf4
      • 2.Re5#
    • 1...Sh4
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Se7
      • 2.Re5#
    • 1...Sf8
      • 2.Re5#
    • 1...Sh8
      • 2.Re5#
    • 1...c5
      • 2.Bxd5#
  • Keys
    • 1.Bh7!
      • threat
        • 2.Re5#
      • 1...Qxe3
        • 2.Sf2#
      • 1...Rxe3
        • 2.Sc3#
      • 1...Bxe3
        • 2.Rf4#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Se5
        • 2.Rf4#
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD,P_SPINQ(a),XP(D)::S(A)
    • R(c);N_GUARD::S(A)
    • R(c);N_GUARD::S(A),XR(c)
    • R(c);N_GUARD,P_SPINR(c),XP(D)::S(A)
    • S(h);N_GUARD::R1(G)
    • S(h);N_GUARD::R1(G),XS(h)
    • P(g);N_GUARD::B(J),XP(f)
  • Actual
    • B(J);
    • Threat
      • R1(G)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(D)::S(A)
      • R(c);N_GUARD,P_SPINR(c),XP(D)::S(A)
      • B(i);N_GUARD,P_SPINB(i),XP(D)::R1(G)
      • B(i);N_GUARD::R1(G),XB(i)
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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).