MESON Chess Problem Database

Problem Display
PID: 16882 (R3B2k/3Qp3/3p2K1/3n3N/1q2pp2/r1P5/b7/B7 w - - 0 1)

Bowell, Gerald P

Chess Problem, 1944

R3B2k/3Qp3/3p2K1/3n3N/1q2pp2/r1P5/b7/B7

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kg8
      • 2.Bf7#
    • 1...e5
      • 2.Qg7#
      • 2.Qh7#
    • 1...e6
      • 2.Qg7#
      • 2.Qh7#
  • Tries
    • 1.Bf7+?
      • 1...Qb8
        • 2.Rxb8#
      • 1...Rxa8!
    • 1.Qxe7?
      • threat
        • 2.Qf8#
        • 2.Qg7#
        • 2.Qh7#
      • 1...Kg8
        • 2.Bf7#
        • 2.Qg7#
      • 1...Qxc3
        • 2.Ba4#
        • 2.Qf8#
        • 2.Qh7#
      • 1...Sxc3
        • 2.Qg7#
        • 2.Qh7#
      • 1...Qd4
        • 2.Ba4#
        • 2.Qf8#
        • 2.Qh7#
      • 1...Qb7
        • 2.Qf8#
      • 1...Ra7
        • 2.Qf8#
      • 1...Se3
        • 2.Qg7#
        • 2.Qh7#
      • 1...Sb6
        • 2.Qg7#
        • 2.Qh7#
      • 1...Sf6
        • 2.Qg7#
      • 1...Sc7
        • 2.Qg7#
        • 2.Qh7#
      • 1...Sxe7+!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Sf6#
      • 1...Kg8
        • 2.Bf7#
      • 1...Qxc3
        • 2.Ba4#
      • 1...Rxc3
        • 2.Bb5#
      • 1...Sf6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(i);P-FLIGHT::R(F)+B(G),DCHECK
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::R(F),XQ(c)
      • Refutation
        • R(b);XR(F)
    • Try
      • Q(E);XP(h)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);::QAR2(E)
        • R(b);::QAR2(E)
        • S(f);::QAB1(E)
      • Refutation
        • S(f);CHECK,XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR(E)+S(C)
    • Vars
      • K(i);P-FLIGHT::R(F)+B(G),DCHECK
      • Q(c);N_GUARD,P_SPINQ(c),XP(B)::R(F)+B(G)
      • R(b);N_GUARD,P_SPINR(b),XP(B)::R(F)+B(G)
      • S(f);::QAR(E)+S(C),XS(f)
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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).