MESON Chess Problem Database

Problem Display
PID: 62928 (6B1/5q2/2n1N3/b7/R1p1N1pR/n2k1P2/P2p1P2/3Q1K2 w - - 0 1)

Groeneveld, Cornelis

1st Prize, Schakend Nederland, 1984

6B1/5q2/2n1N3/b7/R1p1N1pR/n2k1P2/P2p1P2/3Q1K2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.S4c5#
    • 1...Bb6
      • 2.Qxd2#
    • 1...Bc7
      • 2.Qxd2#
    • 1...Bd8
      • 2.Qxd2#
    • 1...Sb1
      • 2.Qxb1#
    • 1...Sc2
      • 2.Qe2#
    • 1...Sb5
      • 2.Qb1#
    • 1...Sb4
      • 2.Qxd2#
    • 1...Sd4
      • 2.S6c5#
    • 1...c3
      • 2.S4c5#
      • 2.S6c5#
  • Tries
    • 1.Rxa3+?
      • 1...Bc3
        • 2.S4c5#
        • 2.Rxc3#
        • 2.Qb1#
        • 2.Qxd2#
      • 1...c3!
    • 1.Qb3+?
      • 1...Bc3
        • 2.S4c5#
        • 2.Qxc3#
      • 1...c3
        • 2.S4c5#
        • 2.S6c5#
      • 1...cxb3!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.Qe2#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Qxf3
        • 2.S6c5#
      • 1...Sxc4
        • 2.Qb1#
      • 1...gxf3
        • 2.S4c5#
      • 1...Bc3
        • 2.Rxc3#
      • 1...Sd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • B(f);SBLOCK::S(G)
    • B(f);N_GUARD::QAR1(A),XP(a)
    • S(b);N_GUARD::QAB(A),XS(b)
    • S(b);SBLOCK::QAB1(A)
    • S(b);N_GUARD::QAB(A)
    • S(g);S_CUTB(f)::QAR1(A),XP(a)
    • S(g);SBLOCK::S(I)
  • Tries
    • Try
      • R(F);CHECK,XS(b)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • R(F);XP(d)
    • Threat
      • QAB1(A)
    • Vars
      • K(c);N_SPINP(a),S_FLIGHT,XR(F)::QAB1(A)
      • Q(h);P_PINP(D),XP(E)::S(I)
      • S(b);N_GUARD,SBLOCK,XR(F)::QAB(A)
      • P(e);XP(E)::S(G)
      • B(f);N_GUARD::R1(F),XB(f)
      • S(g);N_GUARD::R1(F),XS(g)
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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).