MESON Chess Problem Database

Problem Display
PID: 187775 (4Q3/3P3n/4b1NK/3P3R/Rr1Nk3/r7/5P2/4nBB1 w - - 0 1)

Anonymous

The Times, 1909

4Q3/3P3n/4b1NK/3P3R/Rr1Nk3/r7/5P2/4nBB1

#2

11 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Re5#
      • 2.Qxe6#
    • 1...Rb2
      • 2.Re5#
      • 2.Qxe6#
    • 1...Rb3
      • 2.Re5#
      • 2.Qxe6#
    • 1...Rb5
      • 2.Re5#
      • 2.Qxe6#
    • 1...Rb6
      • 2.Re5#
    • 1...Rb7
      • 2.Re5#
      • 2.Qxe6#
    • 1...Rb8
      • 2.Re5#
      • 2.Qxe6#
    • 1...Sd3
      • 2.f3#
  • Tries
    • 1.f3+?
      • 1...Rxf3
        • 2.Re5#
        • 2.Qxe6#
      • 1...Sxf3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qxb4#
      • 1...Rxd4
        • 2.Qf4#
      • 1...Rxb8
        • 2.Re5#
      • 1...Bf5
        • 2.Qe5#
      • 1...Sg5
        • 2.Qe5#
      • 1...Rf3
        • 2.Qe5#
      • 1...Sg2
        • 2.Qe5#
      • 1...Sd3
        • 2.f3#
      • 1...Sf3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • R(c);::R1(G)
    • S(a);N_GUARD,S_CUTR(b)::P(C)
  • Tries
    • Try
      • P(C);CHECK
      • Refutation
        • S(a);XP(C)
  • Actual
    • Q(K);N_PINB(e)
    • Threat
      • DUALS(2)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINR(c),XS(E)::QAR2(K),XR(c)
      • R(c);P_SPINR(c),XS(E)::QAR1(K)
      • R(c);XQ(K)::R1(G)
      • B(e);::QAR1(K)
      • S(f);::QAR1(K)
      • R(b);::QAR1(K)
      • S(a);::QAR1(K)
      • S(a);N_GUARD,S_CUTR(b)::P(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).