MESON Chess Problem Database

Problem Display
PID: 244471 (5N1B/3r4/R7/1Pnk1bRr/2p1N1p1/2P5/5nB1/1K3Qb1 w - - 0 1)

Eerkes, Allard Pieter

Parallele 50, 1949

5N1B/3r4/R7/1Pnk1bRr/2p1N1p1/2P5/5nB1/1K3Qb1

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Rxf5#
    • 1...Rh2
      • 2.Rxf5#
    • 1...Rh3
      • 2.Rxf5#
    • 1...Rh4
      • 2.Rxf5#
    • 1...Rh6
      • 2.Rxf5#
    • 1...Rhh7
      • 2.Rxf5#
    • 1...Rxh8
      • 2.Rxf5#
    • 1...Rd6
      • 2.Rxd6#
    • 1...Ra7
      • 2.Rd6#
    • 1...Rb7
      • 2.Rd6#
    • 1...Rc7
      • 2.Rd6#
    • 1...Re7
      • 2.Rd6#
    • 1...Rf7
      • 2.Rd6#
    • 1...Rdh7
      • 2.Rd6#
    • 1...Sd1
      • 2.Qxf5#
    • 1...Sh1
      • 2.Qxf5#
    • 1...Sh3
      • 2.Qxf5#
    • 1...Sfxe4
      • 2.Qxf5#
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rxc5#
      • 1...Sfxe4
        • 2.Qxf5#
      • 1...Scxe4
        • 2.Qxc4#
      • 1...Rc7
        • 2.Rd6#
      • 1...Sd1
        • 2.Qxf5#
      • 1...Sh1
        • 2.Qxf5#
      • 1...Sfd3
        • 2.Sxc5#
      • 1...Sh3
        • 2.Qxf5#
      • 1...Sb3
        • 2.Qxc4#
      • 1...Scd3
        • 2.Sxf2#
      • 1...Sa4
        • 2.Qxc4#
      • 1...Sa6
        • 2.Qxc4#
      • 1...Se6
        • 2.Qxc4#
      • 1...Sb7
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 13
  • Sets
    • R(h);N_GUARD::R(G),XB(g)
    • R(h);N_GUARD,XB(J)::R(G),XB(g)
    • R(i);N_GUARD::R1(H),XR(i)
    • R(i);N_GUARD::R1(H)
    • R(i);N_GUARD,P_PINP(F)::R1(H)
    • S(b);OGATE::QAR2(B),XB(g)
    • S(b);OGATE,P_SPINS(b),XS(E)::QAR2(B),XB(g)
  • Actual
    • R(H);
    • Threat
      • R1(H),XS(e)
    • Vars
      • S(b);OGATE,P_SPINS(b),XS(E)::QAR2(B),XB(g)
      • S(e);P_SPINS(e),XS(E)::QAB1(B),XP(c)
      • R(i);N_GUARD::R1(H)
      • S(b);OGATE::QAR2(B),XB(g)
      • S(b);N_PINS(E)::B(C)+S(E),XS(e)
      • S(e);::QAB1(B),XP(c)
      • S(e);N_PINS(E)::B(C)+S(E),XS(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).