MESON Chess Problem Database

Problem Display
PID: 52343 (2b1r2B/4pN2/2R2n1p/1P1k1p2/3P4/3Q1n1r/2K3B1/8 w - - 0 1)

Groeneveld, Cornelis

Problem Observer, 2004

2b1r2B/4pN2/2R2n1p/1P1k1p2/3P4/3Q1n1r/2K3B1/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Rc5#
    • 1...Se4
      • 2.Qc4#
      • 2.Qb3#
    • 1...e5
      • 2.Rd6#
      • 2.dxe5#
    • 1...e6
      • 2.Rc5#
      • 2.Rd6#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Qc4#
      • 1...Ke6
        • 2.Qxf5#
      • 1...exd6!
    • 1.Bxf3+?
      • 1...Se4
        • 2.Qc4#
        • 2.Qb3#
      • 1...Rxf3!
    • 1.Qb3+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Qe3?
      • threat
        • 2.Rc5#
        • 2.Qe5#
      • 1...Se4
        • 2.Qb3#
      • 1...Sg4
        • 2.Rc5#
      • 1...Sd7
        • 2.Qe6#
      • 1...e5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qd3#
      • 1...Se4
        • 2.Qc4#
      • 1...Sg4
        • 2.Rc5#
      • 1...Sd7
        • 2.Qe6#
      • 1...e5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(h);SBLOCK::R1(F)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB1(C)
      • Vars
        • K(c);N_SPINS(a),S_FLIGHT::QAB1(C),XP(d)
      • Refutation
        • P(g);XS(G)
    • Try
      • B(B);CHECK,XS(a)
      • Refutation
        • R(b);XB(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);N_SPINS(a),OGATEB,P-FLIGHT,P_SPINS(e),XP(D)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);N_SPINS(a),SBLOCK::QAB(C)
        • S(e);::R1(F)
        • S(e);S_CUTB(h)::QAB1(C)
      • Refutation
        • P(g);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(c);N_SPINS(a),OGATEB,P-FLIGHT,P_SPINS(e),XP(D)::QAR1(C)
      • S(e);N_SPINS(a),SBLOCK::QAB1(C)
      • S(e);::R1(F)
      • S(e);S_CUTB(h)::QAB1(C)
      • P(g);N_GUARD::R1(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).