MESON Chess Problem Database

Problem Display
PID: 83465 (4N3/1K1p4/1n4p1/R2QbkN1/6pp/2n2q1r/B1p5/2B2R2 w - - 0 1)

Ellerman, Arnoldo

Good Companions, 1916

4N3/1K1p4/1n4p1/R2QbkN1/6pp/2n2q1r/B1p5/2B2R2

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf1
      • 2.Qf7#
      • 2.Qxe5#
    • 1...Qf2
      • 2.Qf7#
      • 2.Qxe5#
    • 1...Qf4
      • 2.Qxe5#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sd1
      • 2.Qe4#
    • 1...Sxa2
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Sca4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
      • 2.Qxe5#
    • 1...Sb5
      • 2.Qe4#
    • 1...g3
      • 2.Qxf3#
  • Tries
    • 1.Rxf3+?
      • 1...Rxf3
        • 2.Qf7#
        • 2.Qxe5#
      • 1...gxf3!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Sg7#
      • 1...dxc6
        • 2.Be6#
      • 1...Qf4
        • 2.Qf6#
      • 1...g3
        • 2.Qxf3#
      • 1...Sb5
        • 2.Qe4#
      • 1...Scd5
        • 2.Qxc2#
      • 1...Sbd5
        • 2.Qxd7#
      • 1...d5
        • 2.Qe6#
      • 1...d6
        • 2.Be6#

This is a version of 154299

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_PINQ(E)::QAR1(E),XB(g)
    • S(b);N_GUARD::QAB1(E)
    • S(b);N_GUARD,XB(C)::QAB1(E)
    • P(e);N_GUARD,S_CUTR(d)::QAR2(E),XQ(c)
  • Tries
    • Try
      • R(B);CHECK,N_SPINQ(E),XQ(c)
      • Refutation
        • P(e);XR(B)
  • Actual
    • Q(E);
    • Threat
      • S(H)
    • Vars
      • P(k);N_GUARD,XQ(E)::B(C)
      • Q(c);N_PINQ(E)::QAR1(E)
      • P(e);N_GUARD,S_CUTR(d)::QAR2(E),XQ(c)
      • S(b);N_GUARD,N_SPINB(g)::QAB1(E)
      • S(b);N_PINQ(E),N_SPINB(g)::QAB(E),XP(a)
      • S(i);N_PINQ(E),N_SPINB(g)::QAB(E),XP(k)
      • P(k);N_PINQ(E),N_SPINB(g)::QAB1(E)
      • P(k);N_GUARD::B(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).