MESON Chess Problem Database

Problem Display
PID: 65123 (8/Npp1K3/4RQ2/4B1P1/N1k1b1qR/P7/2B5/8 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Good Companions (October), 1921

8/Npp1K3/4RQ2/4B1P1/N1k1b1qR/P7/2B5/8

#2

10 + 5

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Bb3#
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Bd5
      • 2.Qf1#
    • 1...c5
      • 2.Sb6#
  • Tries
    • 1.Sb6+?
      • 1...Kc5
        • 2.Bd4#
        • 2.Qf2#
      • 1...cxb6!
    • 1.Qf1+?
      • 1...Kd5
        • 2.Bb3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Qe2!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Rc6#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Qxg5+
        • 2.Rf6#
      • 1...Kd5
        • 2.Bb3#
      • 1...Bxc2
        • 2.Rd6#
      • 1...Bd5
        • 2.Qf1#
      • 1...Bc6
        • 2.Rxc6#
      • 1...c5
        • 2.Sb6#
      • 1...c6
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(A)
    • Q(c);CHECK,OGATE,P_SPINB(b),XR(G)::QAB(H),XQ(c)
    • B(b);N_GUARD,P_SPINQ(c),SBLOCK::QAB(H)
    • P(e);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • P(e);XS(C)
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);S_FLIGHT::B(A)
        • B(b);N_GUARD,P_SPINB(b),P_SPINQ(c)::QAB1(H),XB(b)
      • Refutation
        • Q(c);P_SPINB(b),P_SPINQ(c)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+R(G),DCHECK
    • Vars
      • Q(c);CHECK,OGATE,P_SPINB(b),P_SPINQ(c),XR(G)::QAB(H),XQ(c)
      • Q(c);CHECK,N_GUARD,P_SPINB(b),XP(F)::QAB(H)+R(G)
      • K(a);S_FLIGHT::B(A)
      • B(b);N_GUARD,P_SPINQ(c),XB(A)::QAB(H)+R(G)
      • B(b);N_GUARD,P_SPINQ(c),SBLOCK::QAB(H)
      • B(b);P_SPINQ(c)::QAB(H)+R(G),DCHECK,XB(b)
      • P(e);N_GUARD,SBLOCK::S(C)
      • P(e);::QAB(H)+R(G),DCHECK,XP(e)
HTML5 logo

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).