MESON Chess Problem Database

Problem Display
PID: 154947 (8/8/8/8/6Qr/5B2/R1nrpKP1/3kN2R w - - 0 1)

Loedel, Juan Eduardo

Good Companions (May Meredith Ty.), 1916

8/8/8/8/6Qr/5B2/R1nrpKP1/3kN2R

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc1
      • 2.Sd3#
    • 1...Rxg4
      • 2.Sxc2#
    • 1...Sa1
      • 2.Rxa1#
    • 1...Sxe1
      • 2.Rxe1#
    • 1...Se3
      • 2.Ra1#
    • 1...Sb4
      • 2.Ra1#
    • 1...Sd4
      • 2.Ra1#
  • Tries
    • 1.Sd3+?
      • 1...Se1
        • 2.Rxe1#
      • 1...Rxh1!
    • 1.Bxe2+?
      • 1...Kc1
        • 2.Sd3#
      • 1...Rxe2+!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Ra1#
      • 1...Kc1
        • 2.Sd3#
      • 1...Rxa4
        • 2.Sxc2#
      • 1...Rd3
        • 2.Qxc2#
      • 1...Rdd4
        • 2.Qxc2#
      • 1...Rd5
        • 2.Qxc2#
      • 1...Rd6
        • 2.Qxc2#
      • 1...Rd7
        • 2.Qxc2#
      • 1...Rd8
        • 2.Qxc2#
      • 1...Rb4
        • 2.Sxc2#
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • K(a);N_SPINP(d),P-FLIGHT::R(B)+S(A),DCHECK
    • R(e);N_GUARD,XQ(G)::R(B)+S(A),XS(b)
    • S(b);N_GUARD::R(C),XS(b)
    • S(b);OGATE,P_SPINS(b),XS(A)::R1(B),XS(b)
    • S(b);N_GUARD::R(C)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(B),XS(b)
      • Refutation
        • R(e);XR(B)
    • Try
      • B(F);CHECK,P_SPINB(F),XP(d)
      • Vars
        • K(a);P-FLIGHT::R(B)+S(A),DCHECK
      • Refutation
        • R(c);CHECK,P_SPINR(c),XB(F)
  • Actual
    • Q(G);P_PINS(b)
    • Threat
      • R(C)
    • Vars
      • K(a);N_SPINP(d),N_SPINS(b),P-FLIGHT::R(B)+S(A),DCHECK
      • R(e);N_GUARD,N_SPINS(b),XQ(G)::R(B)+S(A),XS(b)
      • R(c);N_GUARD::QAB1(G),XS(b)
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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).