MESON Chess Problem Database

Problem Display
PID: 264038 (4b3/1N6/QP1p4/1n1P2R1/Pp1k4/pK2N2r/1n1P4/BB2R3 w - - 0 1)

Eerkes, Allard Pieter

1st HM., Tijdschrift vd KNSB, 1938

4b3/1N6/QP1p4/1n1P2R1/Pp1k4/pK2N2r/1n1P4/BB2R3

#2

12 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3+
      • 2.dxe3#
    • 1...Sc3
      • 2.Sc2#
    • 1...Sa7
      • 2.Qd3#
      • 2.Qc4#
    • 1...Sc7
      • 2.Qd3#
      • 2.Qc4#
  • Tries
    • 1.Bxb2+?
      • 1...Sc3
        • 2.Sc2#
        • 2.Qd3#
        • 2.Qc4#
      • 1...axb2!
    • 1.Qxb5?
      • threat
        • 2.Qd3#
        • 2.Qc4#
        • 2.Qxb4#
      • 1...Rxe3+
        • 2.dxe3#
      • 1...Bg6
        • 2.Qc4#
        • 2.Qxb4#
      • 1...Bxb5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qxb4#
      • 1...Rxe3+
        • 2.dxe3#
      • 1...Sc3
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,OGATE,XS(F)::P(D),XR(c)
    • S(f);N_PINS(F),N_SPINS(a)::S(F)
  • Tries
    • Try
      • B(A);CHECK,XS(a)
      • Refutation
        • P(b);XB(A)
    • Try
      • Q(J);XS(f)
      • Threat
        • DUALS(3)
      • Vars
        • R(c);CHECK,OGATE,XS(F)::P(D),XR(c)
      • Refutation
        • B(h);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAR2(J),XP(d)
    • Vars
      • R(c);CHECK,OGATE,XS(F)::P(D),XR(c)
      • S(f);N_PINS(F),N_SPINS(a)::S(F)
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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).