MESON Chess Problem Database

Problem Display
PID: 138029 (6K1/1p6/5p2/2p5/R1N1k1P1/1q2P3/3Q4/B3Nrn1 w - - 0 1)

Ellerman, Arnoldo

Karlovac Chess Club, 1928

6K1/1p6/5p2/2p5/R1N1k1P1/1q2P3/3Q4/B3Nrn1

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sd6#
    • 1...Qa2
      • 2.Qd3#
    • 1...Qc2
      • 2.Sd6#
    • 1...Qxa4
      • 2.Sd6#
      • 2.Qd3#
    • 1...Qxc4+
      • 2.Rxc4#
    • 1...Qb1
      • 2.Sd6#
    • 1...Qb2
      • 2.Qd3#
    • 1...Qa3
      • 2.Sd6#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qxe3
      • 2.Sd6#
    • 1...Qb4
      • 2.Sd6#
      • 2.Qd3#
    • 1...Qb5
      • 2.Sd6#
      • 2.Qd3#
    • 1...Qb6
      • 2.Sd6#
      • 2.Qd3#
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qe6#
      • 1...Qxe3
        • 2.Sd2#
      • 1...Rxe1
        • 2.Qf5#
      • 1...Qc3
        • 2.Qxb7#
      • 1...Qb2
        • 2.Qd3#
      • 1...Qb6
        • 2.Qd3#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sf3
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_PINS(F)::R(E)+S(F),DCHECK
    • Q(c);N_GUARD::QAB1(C)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::R(E),XQ(c)
    • Q(c);N_GUARD,N_PINS(F)::QAB1(C)
    • Q(c);N_GUARD,N_PINS(F)::QAB1(C),XQ(c)
    • Q(c);N_PINS(F),XP(D)::R(E)+S(F),DCHECK
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • Q(c);N_PINS(F),SBLOCK,XP(D)::R(E)+S(F),DCHECK
      • R(a);N_GUARD,XS(B)::QAB1(C)
      • Q(c);N_GUARD,N_PINS(F)::QAB(C),XP(g)
      • Q(c);N_GUARD,N_PINS(F)::QAB1(C)
      • R(a);N_GUARD::QAB1(C),XR(a)
      • S(b);S_CUTR(a)::QAB1(C)
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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).