MESON Chess Problem Database

Problem Display
PID: 52231 (brrb4/1N2p3/N3P3/5Q2/2kp4/P7/2K5/8 w - - 0 1)

Bouma, Gerhard Johan

Probleemblad, 2004

(First published on Sun Feb 1 2004)

brrb4/1N2p3/N3P3/5Q2/2kp4/P7/2K5/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rc7
      • 2.Sa5#
    • 1...Ba5
      • 2.Sxa5#
    • 1...Bc7
      • 2.Qc5#
    • 1...d3+
      • 2.Qxd3#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Qd3#
        • 2.Qd5#
      • 1...d3+
        • 2.Qxd3#
      • 1...Rxb7
        • 2.Qd5#
      • 1...Rc5
        • 2.Qd3#
        • 2.Qxc5#
      • 1...Bxb7!
    • 1.Qf1+?
      • 1...d3+
        • 2.Qxd3#
      • 1...Kd5+!
    • 1.a4?
      • threat
        • 2.Qb5#
      • 1...d3+
        • 2.Qxd3#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Rxb7!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Sa5#
        • 2.Qd3#
        • 2.Qb5#
        • 2.Qc5#
        • 2.Qd5#
      • 1...d3+
        • 2.Qxd3#
      • 1...Rxb7
        • 2.Qd5#
      • 1...Rxc7
        • 2.Sa5#
      • 1...Bxb7
        • 2.Qb5#
      • 1...Bxc7
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::QAR1(C),XR(f)
    • R(f);S_CUTB(g)::S(F)
    • B(g);N_GUARD::S(F),XB(g)
    • B(g);S_CUTR(f)::QAR1(C)
    • P(b);CHECK::QAB1(C),XP(b)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
        • R(e);XS(F)::QAB1(C)
      • Refutation
        • B(d);XS(F)
    • Try
      • Q(C);CHECK
      • Vars
        • P(b);CHECK,P_SPINP(b)::QAB1(C),XP(b)
      • Refutation
        • K(a);CHECK,S_FLIGHT
    • Try
      • P(B);
      • Threat
        • QAB1(C)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
        • R(f);N_GUARD::QAR1(C),XR(f)
      • Refutation
        • R(e);XS(F)
  • Actual
    • S(D);
    • Threat
      • DUALS(5)
    • Vars
      • P(b);CHECK::QAB1(C),XP(b)
      • R(e);XS(F)::QAB1(C)
      • R(f);XS(D)::S(F)
      • B(d);XS(F)::QAB1(C)
      • B(g);XS(D)::QAR1(C)
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).