MESON Chess Problem Database

Problem Display
PID: 137751 (B7/B1p1KpQ1/N7/RpP1N1nR/b1pk1P2/b1rp1P2/3P4/3nr3 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Magyar Sakkvilag, 1935

B7/B1p1KpQ1/N7/RpP1N1nR/b1pk1P2/b1rp1P2/3P4/3nr3

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Sxf7#
    • 1...Rg1
      • 2.Sxf7#
    • 1...Rh1
      • 2.Sxf7#
    • 1...Rxe5+
      • 2.Qxe5#
    • 1...Bxc5+
      • 2.Bxc5#
    • 1...Se3
      • 2.Sxf7#
    • 1...Se4
      • 2.Sc6#
    • 1...Se6
      • 2.Sc6#
    • 1...b4
      • 2.c6#
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qd8#
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...Bxc5+
        • 2.Bxc5#
      • 1...Se3
        • 2.Sxf7#
      • 1...Se4
        • 2.Sc6#
      • 1...Se6
        • 2.Sc6#
      • 1...b4
        • 2.c6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(b);N_PINS(F)::QAB(K)+S(F),XP(l)
    • R(b);CHECK,OGATE,P_SPINR(b),XS(F)::QAB1(K),XR(b)
    • B(c);CHECK,OGATE,P_SPINB(c),XP(E)::B(I),XB(c)
    • S(a);N_PINS(F)::QAB(K)+S(F),XP(l)
    • S(j);N_PINS(F)::QAB(K)+S(F),DCHECK
    • P(i);N_PINP(E)::B(I)+P(E)
  • Actual
    • Q(K);
    • Threat
      • QAR(K)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XS(F)::QAB1(K),XR(b)
      • B(c);CHECK,OGATE,P_SPINB(c),XP(E)::B(I),XB(c)
      • S(a);N_PINS(F)::QAB(K)+S(F),XP(l)
      • S(j);N_PINS(F)::QAB(K)+S(F),DCHECK
      • P(i);N_PINP(E)::B(I)+P(E)
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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).