MESON Chess Problem Database

Problem Display
PID: 59866 (3N1n1q/r6Q/p4p2/2Bkr1R1/NR2p3/8/3P4/bb2K3 w - - 0 1)

Roura, Juan R

4th Highly Comm., Brisbane Courier, 1924

3N1n1q/r6Q/p4p2/2Bkr1R1/NR2p3/8/3P4/bb2K3

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Qxb7#
    • 1...Ra8
      • 2.Qb7#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Ba2
      • 2.Qxe4#
    • 1...Sd7
      • 2.Qf7#
  • Tries
    • 1.Qf7+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Rxf7!
  • Keys
    • 1.d4!
      • threat
        • 2.Sb6#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...exd4 ep+
        • 2.Qe4#
      • 1...Bxd4
        • 2.Rxd4#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Sd7
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(h);N_GUARD::QAB(G),XR(h)
    • R(h);N_GUARD::QAB(G)
    • B(a);N_GUARD::R1(D),XB(a)
    • B(b);N_GUARD::QAB1(G),XP(c)
    • S(i);N_GUARD,S_CUTR(h)::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAB1(G),XS(i)
      • Refutation
        • R(h);XQ(G)
  • Actual
    • P(B);
    • Threat
      • S(C)
    • Vars
      • B(a);CHECK,N_GUARD::S(C),XB(a)
      • P(c);CHECK,EP,S_CUTB(b),XP(B)::QAB1(G)
      • B(a);OGATE,XP(B)::R1(D),XB(a)
      • R(h);N_GUARD::QAB(G),XR(h)
      • S(i);N_GUARD,S_CUTR(h)::QAB(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).