MESON Chess Problem Database

Problem Display
PID: 80310 (b6B/8/3p4/R5Qp/1R1Pk2r/4Np1p/nKP4q/1B3n2 w - - 0 1)

Drese, Gerardus Hendrikus

1st Prize, Ajan Suunta, 1933

b6B/8/3p4/R5Qp/1R1Pk2r/4Np1p/nKP4q/1B3n2

#2

9 + 10

6426 Probleemcomponisten V - G H Drese 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.c3#
      • 2.c4#
    • 1...Qg3
      • 2.c3#
      • 2.c4#
    • 1...Qe5
      • 2.c3#
    • 1...Qh1
      • 2.c3#
      • 2.c4#
    • 1...Qxc2+
      • 2.Bxc2#
    • 1...Rf4
      • 2.Qe7#
    • 1...Sc1
      • 2.d5#
    • 1...Sc3
      • 2.d5#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qf5#
      • 1...Qxc2+
        • 2.Bxc2#
      • 1...Sxe3
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Qe5
        • 2.c3#
      • 1...Qf4
        • 2.c4#
      • 1...Rf4
        • 2.Qe7#
      • 1...Sg3
        • 2.Qxh4#
      • 1...Sc3!
    • 1.Re5+?
      • 1...Qxe5
        • 2.c3#
      • 1...dxe5!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Qf5#
      • 1...Qxc2+
        • 2.Bxc2#
      • 1...Sxe3
        • 2.Rxe3#
      • 1...Qf4
        • 2.c4#
      • 1...Qe5
        • 2.c3#
      • 1...Rf4
        • 2.Qe7#
      • 1...Sg3
        • 2.Qxh4#
      • 1...Sc3
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_PINP(C),P_PINP(F)::B(A)+P(C)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
    • R(g);SBLOCK,S_CUTQ(c)::QAR(H)
    • S(b);N_GUARD::R(E)+P(F)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAB1(H)
      • Vars
        • Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
        • Q(c);N_PINP(C),P_PINP(F)::B(A)+P(C)
        • Q(c);N_PINP(C)::B(A)+P(C)
        • R(g);SBLOCK,S_CUTQ(c)::QAR(H)
        • S(a);S_CUTQ(c)::QAR(H),XR(g)
      • Refutation
        • S(b);
    • Try
      • R(G);CHECK
      • Vars
        • Q(c);N_PINP(C),P_PINP(F),XR(G)::B(A)+P(C)
      • Refutation
        • P(i);XR(G)
  • Actual
    • R(G);
    • Threat
      • QAB1(H)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
      • S(a);OGATE,XS(D)::R1(G),XS(a)
      • Q(c);N_PINP(C)::B(A)+P(C)
      • Q(c);N_PINP(C),P_PINP(F)::B(A)+P(C)
      • R(g);SBLOCK,S_CUTQ(c)::QAR(H)
      • S(a);S_CUTQ(c)::QAR(H),XR(g)
      • S(b);N_GUARD::R(E)+P(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).