MESON Chess Problem Database

Problem Display
PID: 21991 (K3B1R1/8/4P2p/2R3N1/p4n1k/r1n2Q1p/3pr3/3q1N1b w - - 0 1)

Niemeijer, Meindert

2nd HM., Brisbane Courier, 1923

K3B1R1/8/4P2p/2R3N1/p4n1k/r1n2Q1p/3pr3/3q1N1b

#2

8 + 11

3098 FIDE Album (1914-1944) (I) 1971
102 Probleemblad 2002
56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qg3#
    • 1...Bxf3+
      • 2.Sxf3#
    • 1...Se4
      • 2.Qxf4#
    • 1...Sg2
      • 2.Qh5#
      • 2.Qg3#
      • 2.Qxh3#
    • 1...Sd5
      • 2.Qh5#
      • 2.Qg3#
      • 2.Qxh3#
  • Keys
    • 1.Rc4!
      • threat
        • 2.Rxf4#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...hxg5
        • 2.Rh8#
      • 1...Rg2
        • 2.Qxh3#
      • 1...Re4
        • 2.Qg3#
      • 1...Se4
        • 2.Qxf4#
      • 1...Sd5
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);N_PINQ(B)::QAB1(B)
    • B(b);CHECK,XQ(B)::S(D),XB(b)
    • S(f);N_PINQ(B)::QAR2(B),XS(i)
  • Actual
    • R(C);P_PINS(i)
    • Threat
      • R(C),XS(i)
    • Vars
      • B(b);CHECK,XQ(B)::S(D),XB(b)
      • P(k);OGATEB,SBLOCK,XS(D)::R(H)
      • R(d);N_PINQ(B)::QAR1(B),XP(g)
      • R(d);N_PINQ(B),N_SPINS(i)::QAB1(B)
      • S(f);N_PINQ(B),N_SPINS(i)::QAR2(B),XS(i)
      • S(f);N_PINQ(B)::QAR1(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).