MESON Chess Problem Database

Problem Display
PID: 20995 (2n1K2B/qp1Q4/1b1pNN1R/pr2k2P/bp6/1P3p2/4B3/4R3 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Good Companions (April), 1915

2n1K2B/qp1Q4/1b1pNN1R/pr2k2P/bp6/1P3p2/4B3/4R3

#2

10 + 11

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Bd3#
    • 1...Rc5
      • 2.Bd3#
  • Tries
    • 1.Bd1+?
      • 1...Kf5
        • 2.Bc2#
        • 2.Qh7#
      • 1...Be3!
    • 1.Bf1+?
      • 1...Kf5
        • 2.Bd3#
        • 2.Bh3#
        • 2.Qh7#
      • 1...Be3!
    • 1.Bxf3+?
      • 1...Kf5
        • 2.Bg4#
        • 2.Qh7#
      • 1...Be3!
    • 1.Bc4+?
      • 1...Kf5
        • 2.Bd3#
        • 2.Qh7#
      • 1...Be3!
    • 1.Bxb5+?
      • 1...Kf5
        • 2.Bd3#
        • 2.Qh7#
      • 1...Be3!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qe4#
      • 1...Rc5+
        • 2.Bb5#
      • 1...Rd5+
        • 2.Sd7#
      • 1...Kxe6
        • 2.Bc4#
      • 1...d5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(f);P-FLIGHT::B(B)
    • R(e);P_PINQ(H),S_CUTB(g)::R(A)+B(B)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • B(B);CHECK
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • B(B);CHECK,XP(a)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • B(B);CHECK
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • B(B);CHECK,XR(e)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • R(e);CHECK,S_CUTB(g)::R(A)+B(B)
      • R(e);CHECK,SBLOCK::B(J)+S(F),DCHECK
      • K(f);P-FLIGHT,XS(E)::R(A)+B(B),DCHECK
      • P(h);SBLOCK::B(J)+S(F)
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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).