MESON Chess Problem Database

Problem Display
PID: 101092 (N1Q1R3/1pp1p1r1/p1k2r1R/q4p1p/2B3pK/B5P1/8/b7 w - - 0 1)

Markwick, Frederick W

Good Companions, 1919

N1Q1R3/1pp1p1r1/p1k2r1R/q4p1p/2B3pK/B5P1/8/b7

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qxc7#
    • 1...Qd2
      • 2.Qxc7#
    • 1...Qc3
      • 2.Qxc7#
    • 1...Qb4
      • 2.Qxc7#
    • 1...Qxa3
      • 2.Qxc7#
    • 1...Qa4
      • 2.Qxc7#
    • 1...Qb5
      • 2.Qxc7#
    • 1...Qc5
      • 2.Qxc7#
    • 1...Qd5
      • 2.Qxc7#
    • 1...Re6
      • 2.Rxe6#
      • 2.Qxe6#
    • 1...b6
      • 2.Qxc7#
    • 1...e5
      • 2.Rxf6#
  • Tries
    • 1.Rxf6+?
      • 1...exf6
        • 2.Re6#
        • 2.Qe6#
      • 1...e6
        • 2.Rfxe6#
        • 2.Rexe6#
        • 2.Qxe6#
      • 1...Bxf6+!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Qd7#
      • 1...Qxa3
        • 2.Qxc7#
      • 1...Qb4
        • 2.Qxc7#
      • 1...Qd2
        • 2.Qxc7#
      • 1...Qd5
        • 2.Qxc7#
      • 1...b5
        • 2.Bd5#
      • 1...b6
        • 2.Qxc7#
      • 1...e5
        • 2.Rxf6#
      • 1...e6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD,P_PINP(B)::QAR1(G),XP(j)
    • Q(c);N_GUARD::QAR1(G),XP(j)
    • Q(c);N_GUARD,XB(A)::QAR1(G),XP(j)
    • P(i);S_CUTQ(c)::QAR1(G),XP(j)
    • P(k);N_GUARD,S_CUTB(a)::R(E),XR(h)
  • Tries
    • Try
      • R(E);CHECK,XR(h)
      • Refutation
        • B(a);CHECK,XR(E)
  • Actual
    • R(H);
    • Threat
      • QAB1(G)
    • Vars
      • Q(c);N_GUARD,XB(A)::QAR1(G),XP(j)
      • Q(c);N_GUARD::QAR1(G),XP(j)
      • P(i);SBLOCK,S_CUTQ(c)::B(C)
      • P(i);S_CUTQ(c)::QAR1(G),XP(j)
      • P(k);N_GUARD,S_CUTB(a)::R(E),XR(h)
      • P(k);N_GUARD,N_SPINR(h),S_CUTR(h)::R1(H)
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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).