MESON Chess Problem Database

Problem Display
PID: 216198 (8/2K5/1p4b1/brpk3B/R4P2/4p3/1pP1N3/1Q6 w - - 0 1)

Collins, Francis Charles

A Collection of 107 Chess Problems, 1881

8/2K5/1p4b1/brpk3B/R4P2/4p3/1pP1N3/1Q6

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc2
      • 2.Bf7#
    • 1...Bd3
      • 2.Bf7#
    • 1...Be4
      • 2.Bf7#
    • 1...Bf7
      • 2.Bxf7#
    • 1...Bh7
      • 2.Bf7#
  • Tries
    • 1.Qa2+?
      • 1...c4
        • 2.Qxc4#
      • 1...Rb3!
    • 1.Qh1+?
      • 1...Be4
        • 2.Bf7#
        • 2.Qxe4#
      • 1...Ke6!
  • Keys
    • 1.Re4!
      • threat
        • 2.c4#
      • 1...Kxe4
        • 2.c4#
      • 1...Bxe4
        • 2.Bf7#
      • 1...c4
        • 2.Re5#
      • 1...Rb4
        • 2.Sc3#
      • 1...Bc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(h);OGATE,XP(B)::B(F)
    • B(h);OGATE::B(F)
    • B(h);OGATE::B(F),XB(h)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(A),XP(e)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • P(B)
    • Vars
      • K(f);S_FLIGHT,XR(D)::QAB(A)+P(B)
      • B(h);OGATE,SBLOCK,XR(D)::B(F)
      • P(e);SBLOCK::R1(D)
      • R(d);S_CUTB(c)::S(C)
      • B(c);N_GUARD::S(C),XB(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).