MESON Chess Problem Database

Problem Display
PID: 60985 (5B2/R2N4/p3k1P1/r2N3K/n1B2p1p/2p4b/2n4r/3Q4 w - - 0 1)

Ellerman, Arnoldo

Good Companions (January), 1917

5B2/R2N4/p3k1P1/r2N3K/n1B2p1p/2p4b/2n4r/3Q4

#2

8 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...Bf1
      • 2.Qg4#
    • 1...Bg2
      • 2.Qg4#
    • 1...Bg4+
      • 2.Qxg4#
    • 1...Bf5
      • 2.Sxf4#
      • 2.Sc7#
    • 1...Sc5
      • 2.Se3#
      • 2.Se7#
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qe4#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Bg4+
        • 2.Qxg4#
      • 1...Kf5
        • 2.Se7#
      • 1...Re2
        • 2.Qxh3#
      • 1...Bg2
        • 2.Qg4#
      • 1...Bf5
        • 2.Sxf4#
      • 1...Sc5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(h);CHECK,OGATE,P_SPINR(h),XS(C)::QAB1(A),XR(h)
    • B(d);N_GUARD::QAB(A)
    • B(d);CHECK,N_GUARD::QAB(A),XB(d)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • R(h);CHECK,OGATE,P_SPINR(h),XS(C)::QAB1(A),XR(h)
      • B(d);CHECK,N_GUARD::QAB(A),XB(d)
      • K(j);N_PINS(C),P_SPINP(f),S_FLIGHT::S(C)
      • R(b);N_GUARD::QAB(A),XB(d)
      • B(d);N_GUARD::QAB(A)
      • B(d);N_PINS(C),SBLOCK::B(B)+S(C),DCHECK,XP(f)
      • S(e);N_PINS(C)::B(B)+S(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).