MESON Chess Problem Database

Problem Display
PID: 188365 (1KB5/r3pPr1/4N3/1R6/4k3/1Nb1p1Pb/Q1n3P1/B2Rn3 w - - 0 1)

van Dijk, Nils Gustav Gerard

The Problemist, 1980

1KB5/r3pPr1/4N3/1R6/4k3/1Nb1p1Pb/Q1n3P1/B2Rn3

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Bb7#
    • 1...Ra3
      • 2.Bb7#
    • 1...Ra4
      • 2.Bb7#
    • 1...Ra5
      • 2.Bb7#
    • 1...Rb7+
      • 2.Bxb7#
    • 1...Ra8+
      • 2.Qxa8#
    • 1...Rg5
      • 2.Sxg5#
    • 1...Rxf7
      • 2.Sg5#
    • 1...Rh7
      • 2.Sg5#
    • 1...Bb4
      • 2.Re5#
    • 1...Ba5
      • 2.Sec5#
      • 2.Re5#
    • 1...Be5+
      • 2.Rxe5#
    • 1...Bf6
      • 2.Sec5#
    • 1...Sf3
      • 2.Qxc2#
  • Tries
    • 1.Sd2+?
      • 1...Kd3
        • 2.Qc4#
      • 1...Bxd2
        • 2.Sc5#
        • 2.Qd5#
      • 1...exd2!
    • 1.Qxc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sxc2!
  • Keys
    • 1.f8Q!
      • threat
        • 2.Qf4#
      • 1...Rb7+
        • 2.Bxb7#
      • 1...Ra8+
        • 2.Qxa8#
      • 1...Be5+
        • 2.Rxe5#
      • 1...Sxg2
        • 2.Qxc2#
      • 1...Bd2
        • 2.Sbc5#
      • 1...Rg4
        • 2.Qf5#
      • 1...Rf7
        • 2.Sg5#
      • 1...Bf6
        • 2.Sec5#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sd3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(g);N_GUARD,XQ(C)::B(K)
    • R(g);N_GUARD::B(K)
    • R(g);CHECK,N_GUARD::B(K),XR(g)
    • R(g);CHECK,OGATE::QAB(C),XR(g)
    • R(i);N_GUARD::S(H),XR(i)
    • R(i);N_GUARD,XP(I)::S(H)
    • R(i);N_GUARD::S(H)
    • B(c);N_GUARD::R1(G)
    • B(c);CHECK,N_GUARD::R1(G),XB(c)
    • B(c);::S(H)
    • S(a);N_GUARD::QAB(C),XS(b)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(C)
      • Refutation
        • P(d);XS(E)
    • Try
      • Q(C);CHECK,XS(b)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(C),XS(a)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • P(I);
    • Threat
      • QAR1(I)
    • Vars
      • R(g);CHECK,N_GUARD::B(K),XR(g)
      • R(g);CHECK,OGATE::QAB(C),XR(g)
      • B(c);CHECK,N_GUARD::R1(G),XB(c)
      • S(a);N_GUARD,XP(D)::QAB(C),XS(b)
      • B(c);::S(E)
      • R(i);S_CUTB(e)::QAB1(I)
      • R(i);N_GUARD::S(H)
      • B(c);::S(H)
      • B(e);N_GUARD::QAB1(I),XB(e)
      • S(a);N_GUARD::QAB1(I)
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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).