MESON Chess Problem Database

Problem Display
PID: 258128 (n7/p2R1n2/p1k1P2p/PR1p2p1/P1q1pB2/1N1N4/bQP5/K7 w - - 0 1)

Kamoen, DW

Probleemblad, 1948

n7/p2R1n2/p1k1P2p/PR1p2p1/P1q1pB2/1N1N4/bQP5/K7

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Rc5#
    • 1...Qxd3
      • 2.Rc5#
    • 1...Qxb5
      • 2.Sd4#
    • 1...Qxc2
      • 2.Sd4#
      • 2.Sb4#
      • 2.Qxc2#
    • 1...Qc3
      • 2.Qxc3#
    • 1...Qxa4
      • 2.Rc5#
    • 1...Qb4
      • 2.Sxb4#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Se5
      • 2.Sxe5#
    • 1...Sd6
      • 2.Se5#
    • 1...Sd8
      • 2.Se5#
    • 1...Sh8
      • 2.Se5#
    • 1...Sb6
      • 2.Rc7#
    • 1...Sc7
      • 2.Rxc7#
  • Tries
    • 1.Rb6+?
      • 1...Sxb6
        • 2.Rc7#
      • 1...axb6!
    • 1.Qc3?
      • threat
        • 2.Sd4#
        • 2.Sb4#
      • 1...Bxb3
        • 2.Sb4#
      • 1...exd3
        • 2.Sd4#
      • 1...d4
        • 2.Sxd4#
        • 2.Sb4#
        • 2.Qxc4#
      • 1...Qxc3+!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qxa8#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qd4+
        • 2.Sxd4#
      • 1...Qxb5
        • 2.Sd4#
      • 1...Qxa4
        • 2.Rc5#
      • 1...Sxh8
        • 2.Se5#
      • 1...Sd6
        • 2.Se5#
      • 1...Sd8
        • 2.Se5#
      • 1...Sb6
        • 2.Rc7#
      • 1...Sc7
        • 2.Rxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD,XS(D)::R1(I)
    • Q(b);N_GUARD,XS(E)::R1(I)
    • Q(b);N_GUARD,XR(I)::S(D)
    • Q(b);OGATEB,P_PINQ(B)::QAR(B),XQ(b)
    • Q(b);N_GUARD,XP(F)::R1(I)
    • Q(b);N_GUARD::S(E),XQ(b)
    • Q(b);N_GUARD,P_PINQ(B)::S(D),XQ(b)
    • Q(b);N_GUARD::R1(I),XQ(b)
    • S(j);N_GUARD::S(E),XS(j)
    • S(j);N_GUARD::S(E)
    • S(k);N_GUARD::R1(K)
    • S(k);N_GUARD::R1(K),XS(k)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • S(k);XR(I)::R1(K)
      • Refutation
        • P(i);XR(I)
    • Try
      • Q(B);P_PINQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XS(D)::S(E)
        • P(c);XS(E)::S(D)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B),XS(k)
    • Vars
      • Q(b);CHECK,OGATEB::QAR(B),XQ(b)
      • Q(b);CHECK,N_GUARD::S(D),XQ(b)
      • Q(b);N_GUARD,XR(I)::S(D)
      • Q(b);N_GUARD,XP(F)::R1(I)
      • S(j);N_GUARD,XQ(B)::S(E)
      • S(j);N_GUARD::S(E)
      • S(k);N_GUARD::R1(K)
      • S(k);N_GUARD::R1(K),XS(k)
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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).