MESON Chess Problem Database

Problem Display
PID: 198369 (1Kn3b1/3pB1q1/2pr2p1/1p4Qn/pRNk1b1R/8/3P4/1B3N2 w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1920

1Kn3b1/3pB1q1/2pr2p1/1p4Qn/pRNk1b1R/8/3P4/1B3N2

#2

9 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qh6
      • 2.Qe5#
    • 1...Qf8
      • 2.Qe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qh7
      • 2.Qe5#
    • 1...Rd5+
      • 2.Se5#
    • 1...Re6+
      • 2.Sd6#
    • 1...Rf6+
      • 2.Qe5#
    • 1...Bd5
      • 2.Qg1#
    • 1...Bh7
      • 2.Sb2#
      • 2.Sa3#
      • 2.Sce3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sxd6#
    • 1...Sf6
      • 2.Qe5#
  • Tries
    • 1.Bxd6?
      • threat
        • 2.Qc5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qg1#
      • 1...c5
        • 2.Qxc5#
      • 1...Sxd6!
    • 1.Bf6+?
      • 1...Rxf6+
        • 2.Qe5#
      • 1...Sxf6
        • 2.Qe5#
      • 1...Qxf6!
  • Keys
    • 1.Sh2!
      • threat
        • 2.Sf3#
      • 1...Rd5+
        • 2.Se5#
      • 1...Re6+
        • 2.Sd6#
      • 1...Rf6+
        • 2.Qe5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(j);N_GUARD::QAB1(G),XQ(j)
    • Q(j);N_GUARD::QAB1(G)
    • R(g);CHECK,SBLOCK,S_CUTB(l)::R(D)+S(E)
    • R(g);CHECK,S_CUTB(l)::R(D)+S(E)
    • R(g);CHECK,S_CUTQ(j)::QAB1(G)
    • B(l);SBLOCK::QAB(G)
    • S(e);S_CUTQ(j)::QAB1(G)
  • Tries
    • Try
      • B(H);P_SPINB(H),XR(g)
      • Threat
        • QAB1(G)
      • Vars
        • Q(j);N_GUARD::QAB1(G),XQ(j)
        • B(l);SBLOCK::QAB(G)
        • P(f);::QAB1(G),XP(f)
      • Refutation
        • S(k);XB(H)
    • Try
      • B(H);CHECK
      • Vars
        • R(g);CHECK,XB(H)::QAB1(G)
        • S(e);XB(H)::QAB1(G)
      • Refutation
        • Q(j);XB(H)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(g);CHECK,SBLOCK,S_CUTB(l)::R(D)+S(E)
      • R(g);CHECK,S_CUTB(l)::R(D)+S(E)
      • R(g);CHECK,S_CUTQ(j)::QAB1(G)
      • Q(j);N_GUARD::QAB1(G),XQ(j)
      • B(l);SBLOCK::QAB(G)
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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).