MESON Chess Problem Database

Problem Display
PID: 145052 (5n2/8/BR1P1N2/P1k2KRp/2P1Q3/2pqb3/4p2p/3n2B1 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1931

5n2/8/BR1P1N2/P1k2KRp/2P1Q3/2pqb3/4p2p/3n2B1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Qxc4#
    • 1...Qxe4+
      • 2.Kxe4#
    • 1...Qd4
      • 2.Qc6#
    • 1...Qd5+
      • 2.Qxd5#
    • 1...Qxd6
      • 2.Rb5#
    • 1...Bd4
      • 2.Kf4#
    • 1...Se6
      • 2.Sd7#
    • 1...Sg6
      • 2.Sd7#
    • 1...Sd7
      • 2.Sxd7#
    • 1...Sh7
      • 2.Sd7#
  • Tries
    • 1.Bxe3+?
      • 1...Qxe3
        • 2.Qd5#
      • 1...Qd4
        • 2.Kf4#
        • 2.Bxd4#
        • 2.Qd5#
        • 2.Qc6#
        • 2.Qxd4#
        • 2.Qe5#
      • 1...Sxe3+!
    • 1.Rg7?
      • threat
        • 2.Rc7#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qxd6
        • 2.Rb5#
      • 1...Se6
        • 2.Sd7#
      • 1...Sd7
        • 2.Sxd7#
      • 1...Qxe4+!
  • Keys
    • 1.Se8!
      • threat
        • 2.Rb5#
      • 1...Qxe4+
        • 2.Kxe4#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qxc4
        • 2.Qxc4#
      • 1...Qb1
        • 2.Kf6#
      • 1...Qd4
        • 2.Qc6#
      • 1...Bd4
        • 2.Kf4#

This is a version of 241610

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_PINQ(C),XP(B)::QAR1(C),XQ(e)
    • Q(e);CHECK,XQ(C)::R(F)+K(E),XQ(e)
    • Q(e);N_PINQ(C),N_SPINB(f),SBLOCK::QAR1(C)
    • Q(e);CHECK,N_PINQ(C)::QAR1(C),XQ(e)
    • Q(e);N_PINQ(C),SBLOCK,XP(I)::R1(H)
    • B(f);::R(F)+K(E)
    • S(i);N_GUARD::S(J)
    • S(i);N_GUARD::S(J),XS(i)
  • Tries
    • Try
      • B(A);CHECK,XB(f)
      • Vars
        • Q(e);N_PINQ(C),XB(A)::QAR1(C)
      • Refutation
        • S(a);CHECK,XB(A)
    • Try
      • R(F);
      • Threat
        • R(F)
      • Vars
        • Q(e);CHECK,N_PINQ(C)::QAR1(C),XQ(e)
        • Q(e);N_PINQ(C),SBLOCK,XP(I)::R1(H)
        • S(i);N_GUARD::S(J)
        • S(i);N_GUARD::S(J),XS(i)
      • Refutation
        • Q(e);CHECK,XQ(C)
  • Actual
    • S(J);
    • Threat
      • R1(H)
    • Vars
      • Q(e);CHECK,XQ(C)::R(F)+K(E),XQ(e)
      • Q(e);CHECK,N_PINQ(C)::QAR1(C),XQ(e)
      • Q(e);N_PINQ(C),XP(B)::QAR1(C),XQ(e)
      • Q(e);N_GUARD::R(F)+K(E)
      • Q(e);N_PINQ(C),N_SPINB(f),SBLOCK::QAR1(C)
      • B(f);::R(F)+K(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).