MESON Chess Problem Database

Problem Display
PID: 108271 (8/7B/7B/2p4Q/8/b2N4/p1r1PK2/R1nk1N2 w - - 0 1)

Eddy, Edwin John

Bulletin de la FFE, 1929

8/7B/7B/2p4Q/8/b2N4/p1r1PK2/R1nk1N2

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Rxc1#
    • 1...Rd2
      • 2.Se3#
    • 1...Rxe2+
      • 2.Qxe2#
  • Tries
    • 1.Sb2+?
      • 1...Rxb2
        • 2.Rxc1#
      • 1...Bxb2!
    • 1.Qd5?
      • threat
        • 2.Sb2#
      • 1...Rb2
        • 2.Sxb2#
        • 2.Rxc1#
      • 1...Rd2
        • 2.Se3#
      • 1...Bb2
        • 2.Sxb2#
      • 1...Rxe2+!
  • Keys
    • 1.Se1!
      • threat
        • 2.Bxc2#
      • 1...Rxe2+
        • 2.Qxe2#
      • 1...Rb2
        • 2.Rxc1#
      • 1...Rd2
        • 2.Se3#
      • 1...Rc3
        • 2.e3#
      • 1...Rc4
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD,S_CUTB(e)::R1(A),XS(a)
    • R(d);SBLOCK::S(B)
    • R(d);CHECK,OGATE,P_SPINR(d),XP(C)::QAB1(F),XR(d)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(d);XS(E)::R1(A),XS(a)
      • Refutation
        • B(e);XS(E)
    • Try
      • Q(F);
      • Threat
        • QAR(F)+S(E),DCHECK
      • Vars
        • R(d);SBLOCK::S(B)
        • B(e);::QAR(F)+S(E),DCHECK,XB(e)
      • Refutation
        • R(d);CHECK,XP(C)
  • Actual
    • S(E);
    • Threat
      • B(H),XR(d)
    • Vars
      • R(d);CHECK,OGATE,P_SPINR(d),XP(C)::QAB1(F),XR(d)
      • R(d);N_GUARD,S_CUTB(e)::R1(A),XS(a)
      • R(d);SBLOCK::S(B)
      • R(d);N_PINP(C)::QAB(F)+P(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).