MESON Chess Problem Database

Problem Display
PID: 61011 (8/r1np1pB1/rp4QK/5Rp1/Nnk3N1/b6R/p2p4/2q5 w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Good Companions (January), 1920

8/r1np1pB1/rp4QK/5Rp1/Nnk3N1/b6R/p2p4/2q5

#2

7 + 13

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rc3#
    • 1...Qd1
      • 2.Rc3#
    • 1...Qe1
      • 2.Rc3#
    • 1...Qf1
      • 2.Rc3#
    • 1...Qg1
      • 2.Rc3#
    • 1...Qc3
      • 2.Rxc3#
    • 1...Ra5
      • 2.Sxb6#
    • 1...b5
      • 2.Rc5#
  • Keys
    • 1.Qxb6!
      • threat
        • 2.Rc5#
      • 1...Rxb6+
        • 2.Sxb6#
      • 1...Qc3
        • 2.Rxc3#
      • 1...Qg1
        • 2.Rc3#
      • 1...Ra5
        • 2.Qd4#
      • 1...Sc2
        • 2.Rc3#
      • 1...Sd3
        • 2.Se3#
      • 1...Sbd5
        • 2.Se5#
      • 1...Sc6
        • 2.Qb3#
      • 1...Scd5
        • 2.Se5#
      • 1...Se6
        • 2.Qb5#
      • 1...d5
        • 2.Se5#
      • 1...d6
        • 2.Qd4#
      • 1...f6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::R1(A)
    • Q(a);N_GUARD::R1(A),XQ(a)
    • R(h);N_GUARD::S(B),XP(i)
    • P(i);N_GUARD,P_PINQ(E)::R1(D)
  • Actual
    • Q(E);P_SPINQ(E),XP(i)
    • Threat
      • R1(D)
    • Vars
      • R(h);CHECK,XQ(E)::S(B),XR(h)
      • Q(a);N_GUARD::R1(A),XQ(a)
      • Q(a);N_GUARD::R1(A)
      • R(h);N_PINQ(E)::QAR1(E)
      • S(e);S_CUTQ(a)::R1(A)
      • S(e);SBLOCK::S(C)
      • S(e);N_PINQ(E)::QAB1(E)
      • S(k);SBLOCK::S(C)
      • S(k);N_PINQ(E)::QAB1(E)
      • P(l);SBLOCK::S(C)
      • P(l);N_PINQ(E)::QAR1(E)
      • P(m);N_PINQ(E)::QAR1(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).