MESON Chess Problem Database

Problem Display
PID: 141103 (2r5/1pB1N3/4p1p1/2k1p1r1/8/2Kp1Pp1/2n2P2/1RR1QB2 w - - 0 1)

den Toom, Bas

Probleemblad, 1976

2r5/1pB1N3/4p1p1/2k1p1r1/8/2Kp1Pp1/2n2P2/1RR1QB2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qxe5#
    • 1...Sa1
      • 2.Qe3#
    • 1...Sa3
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...d2
      • 2.Rb5#
  • Tries
    • 1.Qe3+?
      • 1...Sd4
        • 2.Kd2#
        • 2.Kxd3#
      • 1...Sxe3!
  • Keys
    • 1.Kb3!
      • threat
        • 2.Qb4#
      • 1...Kd4
        • 2.Qc3#
      • 1...Kb5
        • 2.Qa5#
      • 1...Rg4
        • 2.Qxe5#
      • 1...d2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD::QAR2(C),XP(e)
    • S(a);N_GUARD::QAB(C)
    • S(a);N_GUARD::QAB(C),XS(a)
    • P(b);::R1(A)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • S(a);XQ(C)
  • Actual
    • K(F);P-FLIGHT,P_PINS(a)
    • Threat
      • QAB1(C)
    • Vars
      • K(d);N_SPINS(a),S_FLIGHT::QAB1(C)
      • K(d);N_SPINS(a),P-FLIGHT,P_SPINP(b)::QAR1(C)
      • R(f);N_GUARD::QAR2(C),XP(e)
      • P(b);::QAB(C)
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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).