MESON Chess Problem Database

Problem Display
PID: 156034 (2B3N1/p7/R1rkPp2/Q7/2p1p2q/2K1N1r1/3P3B/n7 w - - 0 1)

Drese, Gerardus Hendrikus

Nederlandse Bond van Probleemvrienden, 1932

2B3N1/p7/R1rkPp2/Q7/2p1p2q/2K1N1r1/3P3B/n7

#2

9 + 9

1577 Jaarboek 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Bxg3#
    • 1...Qh8
      • 2.Bxg3#
  • Tries
    • 1.Bxg3+?
      • 1...Qf4
        • 2.Sxc4#
        • 2.Sf5#
        • 2.Bxf4#
      • 1...Qxg3!
    • 1.Qc7+?
      • 1...Kc5
        • 2.Ra5#
        • 2.Qxc6#
      • 1...Kxc7!
    • 1.Qd8+?
      • 1...Kc5
        • 2.Ra5#
        • 2.Qd5#
      • 1...Ke5!
  • Keys
    • 1.d4!
      • threat
        • 2.Qd8#
      • 1...cxd4 ep+
        • 2.Sc4#
      • 1...Rxa6
        • 2.Qc5#
      • 1...exd4 ep
        • 2.Sf5#
      • 1...Rb6
        • 2.Qc5#
      • 1...Qh7
        • 2.Bxg3#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(e);N_GUARD::B(B),XR(b)
  • Tries
    • Try
      • B(B);CHECK,N_SPINS(D),P_PINR(f),XR(b)
      • Refutation
        • Q(e);P_PINS(D),XB(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(g);S_FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • P(A);
    • Threat
      • QAR2(E)
    • Vars
      • P(c);CHECK,EP,N_PINS(D),XP(A)::S(D)
      • R(f);XR(F)::QAB1(E)
      • P(d);EP,N_PINS(D),XP(A)::S(D)
      • R(f);::QAB1(E)
      • Q(e);N_GUARD::B(B),XR(b)
      • P(h);N_GUARD::QAB1(E)
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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).