MESON Chess Problem Database

Problem Display
PID: 276214 (5nBB/2p5/2pp1P1N/4kN1p/q4p2/2pQ1P2/b1P5/b5nK w - - 0 1)

Eerkes, Allard Pieter

2nd HM., To Mat, 1953

5nBB/2p5/2pp1P1N/4kN1p/q4p2/2pQ1P2/b1P5/b5nK

#2

9 + 12

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Qd4#
    • 1...Qb3
      • 2.Qe4#
      • 2.Qd4#
    • 1...Qb5
      • 2.Qe4#
      • 2.Qd4#
    • 1...Qa3
      • 2.Qe4#
      • 2.Qd4#
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qa5
      • 2.Qe4#
      • 2.Qd4#
    • 1...Qa6
      • 2.Qe4#
      • 2.Qd4#
    • 1...Qa7
      • 2.Qe4#
    • 1...Qa8
      • 2.Qe4#
      • 2.Qd4#
    • 1...Bc4
      • 2.Qe4#
      • 2.Qd4#
    • 1...Be6
      • 2.f7#
    • 1...Se6
      • 2.Sf7#
    • 1...h4
      • 2.Sg4#
  • Tries
    • 1.Qe2+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sxe2!
    • 1.Qe3+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...fxe3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qe4#
      • 1...Qxc2
        • 2.Sxc6#
      • 1...Qxd4
        • 2.Qf5#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...d5
        • 2.Sf7#
      • 1...Bd5
        • 2.f7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD,XP(B)::QAB1(C)
    • Q(e);N_GUARD::QAB1(C),XQ(e)
    • Q(e);N_GUARD,P_PINP(D)::QAR1(C),XQ(e)
    • Q(e);N_GUARD::QAR1(C)
    • B(c);SBLOCK::B(I)+P(F)
    • S(l);SBLOCK,S_CUTB(c)::S(G)
    • P(h);N_GUARD::S(G)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(e);N_GUARD,P_PINP(D),P_SPINQ(e)::QAR1(C),XQ(e)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(e);N_GUARD,P_PINP(D),P_SPINQ(e)::QAR1(C),XQ(e)
      • Refutation
        • P(f);XQ(C)
  • Actual
    • S(E);
    • Threat
      • QAR1(C)
    • Vars
      • Q(e);N_GUARD,XP(B)::S(E),XP(i)
      • Q(e);SBLOCK,XS(E)::QAR1(C)
      • S(b);XP(D)::S(E),XS(b)
      • P(j);SBLOCK,S_CUTB(c)::S(G)
      • B(c);P_PINP(D),SBLOCK::B(I)+P(F)
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).