MESON Chess Problem Database

Problem Display
PID: 101472 (2RR4/1pP4K/2k5/Q1p5/1q5b/N3N3/8/8 w - - 0 1)

Weenink, Henri Gerard Maria

1st Prize, Magee TT, 1919

2RR4/1pP4K/2k5/Q1p5/1q5b/N3N3/8/8

#2

7 + 5

16055 HGM Weenink (Euwe/Niemeijer/Rueb/Trotsenburg) 1932
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qb5#
    • 1...Qd2
      • 2.Qb5#
    • 1...Qc3
      • 2.Qb5#
    • 1...Qd4
      • 2.Qb5#
    • 1...Qf4
      • 2.Qb5#
    • 1...Qg4
      • 2.Qb5#
    • 1...Qb5
      • 2.Qxb5#
    • 1...Bxd8
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...b5
      • 2.Qa6#
    • 1...b6
      • 2.Qa8#
  • Tries
    • 1.Qxb4?
      • threat
        • 2.Qb5#
      • 1...Bxd8
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...b5
        • 2.Qxb5#
      • 1...b6
        • 2.Qe4#
      • 1...cxb4!
    • 1.Qa4+?
      • 1...Kb6
        • 2.Sd5#
        • 2.Rd6#
      • 1...Qb5
        • 2.Qxb5#
      • 1...b5
        • 2.Qa6#
      • 1...Qxa4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rd6#
      • 1...Bxd8
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...b5
        • 2.Qa6#
      • 1...b6
        • 2.Qa8#
      • 1...Qd2
        • 2.Qb5#
      • 1...Qd4
        • 2.Qb5#
      • 1...Qf4
        • 2.Qb5#
      • 1...Bg3
        • 2.Se7#
      • 1...Be7
        • 2.Sxe7#
      • 1...c4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::QAB1(C)
    • Q(a);N_GUARD::QAB1(C),XQ(a)
    • B(b);OGATE,XR(G)::PXB(b)=Q
    • P(e);N_GUARD,S_CUTQ(a)::QAR2(C)
    • P(e);OGATEB,SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);XQ(a)
      • Threat
        • QAB1(C)
      • Vars
        • B(b);OGATE,XR(G)::PXB(b)=Q
        • P(e);::QAB1(C),XP(e)
        • P(e);SBLOCK::QAB(C)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(C),XQ(a)
        • P(e);N_GUARD,P_SPINP(e),S_CUTQ(a)::QAR2(C)
      • Refutation
        • Q(a);XQ(C)
  • Actual
    • S(B);
    • Threat
      • R1(G)
    • Vars
      • B(b);OGATE,XR(G)::PXB(b)=Q
      • P(e);N_GUARD,S_CUTQ(a)::QAR2(C)
      • P(e);OGATEB,SBLOCK::QAB(C)
      • Q(a);N_GUARD::QAB1(C)
      • B(b);N_GUARD::S(B)
      • B(b);N_GUARD::S(B),XB(b)
      • P(c);N_GUARD,S_CUTQ(a)::S(B)
HTML5 logo

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).