MESON Chess Problem Database

Problem Display
PID: 237286 (6nK/1p4Np/1Q4p1/1PNk4/5P1n/bP1PP1pq/8/2r4b w - - 0 1)

Groeneveld, Cornelis

Schweizerische Arbeiter Schachzeitung, 1959

6nK/1p4Np/1Q4p1/1PNk4/5P1n/bP1PP1pq/8/2r4b

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.bxc4#
      • 2.dxc4#
    • 1...Be4
      • 2.dxe4#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qd4#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rc5
        • 2.Qd6#
      • 1...Bb2
        • 2.Qd6#
      • 1...Bc5
        • 2.Qxb7#
      • 1...Sf5
        • 2.Qe6#
      • 1...Sf3!
    • 1.Sa6?
      • threat
        • 2.Qd4#
      • 1...Rc4
        • 2.bxc4#
      • 1...Bb2
        • 2.Sb4#
      • 1...Bc5
        • 2.Sc7#
      • 1...Sf3
        • 2.e4#
      • 1...Sf5
        • 2.Qe6#
      • 1...Rc5!
    • 1.Sce6?
      • threat
        • 2.Qd4#
      • 1...Rc5
        • 2.Qd8#
      • 1...Rc4
        • 2.bxc4#
      • 1...Bb2
        • 2.Qd8#
      • 1...Bc5
        • 2.Sc7#
      • 1...Sf3
        • 2.e4#
      • 1...Sf5!
  • Keys
    • 1.Sxb7!
      • threat
        • 2.Qd4#
      • 1...Rc5
        • 2.Qd6#
      • 1...Rc4
        • 2.bxc4#
      • 1...Bb2
        • 2.Qd6#
      • 1...Bc5
        • 2.Qc6#
      • 1...Sf3
        • 2.e4#
      • 1...Sf5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(b);OGATE::P(B),XB(b)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(G)
      • Vars
        • R(a);OGATE::P(A),XR(a)
        • R(a);S_CUTB(c)::QAR1(G)
        • B(c);N_GUARD,P_PINS(H)::QAR1(G)
        • B(c);S_CUTR(a)::QAB(G),XP(i)
        • S(f);S_CUTQ(e)::QAB1(G)
      • Refutation
        • S(f);
    • Try
      • S(F);
      • Threat
        • QAR1(G)
      • Vars
        • R(a);OGATE::P(A),XR(a)
        • B(c);N_GUARD,P_PINS(H)::S(F)
        • B(c);S_CUTR(a)::S(F)
        • S(f);S_CUTB(b)::P(C)
        • S(f);S_CUTQ(e)::QAB1(G)
      • Refutation
        • R(a);
    • Try
      • S(F);
      • Threat
        • QAR1(G)
      • Vars
        • R(a);S_CUTB(c)::QAR(G)
        • R(a);OGATE::P(A),XR(a)
        • B(c);N_GUARD,P_PINS(H)::QAR(G)
        • B(c);S_CUTR(a)::S(F)
        • S(f);S_CUTB(b)::P(C)
      • Refutation
        • S(f);
  • Actual
    • S(F);XP(i)
    • Threat
      • QAR1(G)
    • Vars
      • R(a);S_CUTB(c)::QAR1(G)
      • R(a);OGATE::P(A),XR(a)
      • B(c);N_GUARD,P_PINS(H)::QAR1(G)
      • B(c);S_CUTR(a)::QAB1(G)
      • S(f);S_CUTB(b)::P(C)
      • S(f);S_CUTQ(e)::QAB1(G)
HTML5 logo

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).