MESON Chess Problem Database

Problem Display
PID: 216194 (7Q/1P6/4np2/n4N2/3Pk1p1/1B3RP1/8/4K3 w - - 0 1)

Collins, Francis Charles

A Collection of 107 Chess Problems, 1881

7Q/1P6/4np2/n4N2/3Pk1p1/1B3RP1/8/4K3

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf3
      • 2.Bd5#
      • 2.Qh1#
  • Tries
    • 1.Bc2+?
      • 1...Kxf3
        • 2.Qh1#
      • 1...Kd5!
    • 1.Qe8?
      • 1...Kxf3
        • 2.Bd5#
      • 1...Sxb3
        • 2.Qc6#
      • 1...Sxb7
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...gxf3!
  • Keys
    • 1.Qc8!
      • 1...Kxf3
        • 2.Bd5#
      • 1...Sxb3
        • 2.Qc6#
      • 1...Sxb7
        • 2.Qxb7#
        • 2.Qc6#
      • 1...Sxd4
        • 2.Re3#
      • 1...gxf3
        • 2.Qc2#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sf4
        • 2.Re3#
      • 1...Sc5
        • 2.Re3#
      • 1...Sg5
        • 2.Re3#
      • 1...Sc7
        • 2.Re3#
      • 1...Sg7
        • 2.Re3#
      • 1...Sd8
        • 2.Re3#
      • 1...Sf8
        • 2.Re3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(C)::QAB(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);P_PINS(d)
      • Vars
        • K(a);N_SPINS(d),S_FLIGHT,XR(C)::B(B)
        • S(c);N_GUARD,XB(B)::QAB(H)
        • S(c);N_GUARD,XP(G)::QAB(H)
        • S(c);N_GUARD::QAB(H)
        • S(c);N_GUARD::QAB(H),XS(c)
      • Refutation
        • P(b);XR(C)
  • Actual
    • Q(H);
    • Vars
      • K(a);S_FLIGHT,XR(C)::B(B)
      • S(c);N_GUARD,XB(B)::QAB(H)
      • S(d);XP(E)::R1(C)
      • P(b);SBLOCK,XR(C)::QAB(H)
      • S(c);N_GUARD::QAB(H)
      • S(c);N_GUARD::QAB(H),XS(c)
      • S(d);::R1(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).