MESON Chess Problem Database

Problem Display
PID: 18696 (6b1/8/nK1P2Nn/5Ppq/Q1pk3r/2R1N3/8/1BR5 w - - 0 1)

Groeneveld, Cornelis

1st Prize, Schweizerische Schachzeitung, 1957

6b1/8/nK1P2Nn/5Ppq/Q1pk3r/2R1N3/8/1BR5

#2

9 + 8

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxd1#
    • 1...Re4
      • 2.Rd3#
    • 1...Rg4
      • 2.Qd1#
    • 1...Bh7
      • 2.Qxc4#
    • 1...Sg4
      • 2.Qd1#
    • 1...Sf7
      • 2.Qxc4#
    • 1...g4
      • 2.Qd1#
  • Tries
    • 1.Rd1+?
      • 1...Kxc3
        • 2.Qa3#
      • 1...Qxd1!
    • 1.Qe8?
      • threat
        • 2.Qe5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Be6
        • 2.Qh8#
      • 1...Sg4
        • 2.Qe4#
      • 1...Sf7
        • 2.Rxc4#
      • 1...Qxg6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qe5#
      • 1...Qxg6
        • 2.Rd1#
      • 1...Re4
        • 2.Sc2#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sg4
        • 2.Rd1#
      • 1...Sf7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD::QAR(E),XQ(e)
    • R(c);SBLOCK::R1(C)
    • R(c);S_CUTQ(e)::QAR(E)
    • B(h);N_GUARD::QAR1(E),XP(a)
    • S(g);S_CUTQ(e)::QAR(E)
    • S(g);S_CUTB(h)::QAR1(E),XP(a)
    • P(d);S_CUTQ(e)::QAR(E)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XR(C)::QAR2(E)
      • Refutation
        • Q(e);XR(B)
    • Try
      • Q(E);N_PINP(a)
      • Threat
        • QAB1(E)
      • Vars
        • R(c);N_GUARD::QAR1(E),XR(c)
        • B(h);OGATE::QAB(E)
        • S(g);S_CUTR(c)::QAR1(E)
        • S(g);S_CUTB(h)::R1(C),XP(a)
      • Refutation
        • Q(e);P_PINP(H),XS(I)
  • Actual
    • Q(E);N_PINP(a)
    • Threat
      • QAB1(E)
    • Vars
      • Q(e);N_GUARD,P_PINP(H),XS(I)::R(B)
      • R(c);SBLOCK::S(D)
      • B(h);N_GUARD::QAR1(E),XB(h)
      • S(f);N_GUARD::QAB1(E),XS(f)
      • S(g);S_CUTQ(e)::R(B)
      • S(g);S_CUTB(h)::QAR1(E)
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).