MESON Chess Problem Database

Problem Display
PID: 263765 (3RN3/2rn4/1bP5/Rq2kPQ1/1P5p/2PP2n1/BN6/K7 w - - 0 1)

Eerkes, Allard Pieter

2nd HM., Tijdschrift vd NSB, 1942

3RN3/2rn4/1bP5/Rq2kPQ1/1P5p/2PP2n1/BN6/K7

#2

12 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Sc4#
      • 2.Rxd5#
    • 1...Sf1
      • 2.f6#
    • 1...Sh1
      • 2.f6#
    • 1...Se2
      • 2.f6#
    • 1...Sh5
      • 2.f6#
    • 1...Sc5
      • 2.Rd5#
    • 1...Sf6
      • 2.Sc4#
    • 1...Sb8
      • 2.Sc4#
    • 1...Sf8
      • 2.Sc4#
  • Tries
    • 1.Rxb5+?
      • 1...Sc5
        • 2.Sc4#
        • 2.Rd5#
      • 1...Bc5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Kxd6
        • 2.Qf6#
      • 1...Sc5
        • 2.d4#
      • 1...Sf6
        • 2.Sdc4#
      • 1...Sb8
        • 2.Sdc4#
      • 1...Sf8
        • 2.Sdc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAR(I)+P(H)
    • S(g);N_SPINQ(c),OGATE::R1(K)
    • S(g);::S(C)
  • Tries
    • Try
      • R(G);CHECK,XQ(c)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • S(L);
    • Threat
      • S(L)
    • Vars
      • K(d);N_GUARD,N_SPINQ(c),P_SPINS(g),S_FLIGHT,XS(L)::QAR2(I)
      • S(g);N_SPINQ(c),S_CUTB(e)::P(E)
      • S(g);::S(L)
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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).