MESON Chess Problem Database

Problem Display
PID: 176594 (r3k2r/3ppp2/1R1PN2P/B3Q3/8/5K2/1b6/8 w - - 0 1)

Mansfield, Comins

Schach-Echo, 1971

r3k2r/3ppp2/1R1PN2P/B3Q3/8/5K2/1b6/8

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa5
      • 2.Rb8#
    • 1...Ra6
      • 2.Rb8#
    • 1...Ra7
      • 2.Rb8#
    • 1...Rb8
      • 2.Rxb8#
    • 1...Bc1
      • 2.Qxh8#
    • 1...Ba3
      • 2.Qxh8#
    • 1...f6
      • 2.Qh5#
  • Tries
    • 1.Sg7+?
      • 1...Kd8
        • 2.Rb8#
      • 1...Kf8!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qxh8#
        • 2.Qxe7#
      • 1...Kd8
        • 2.Rb8#
        • 2.Qxh8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Rxh6
        • 2.Qxe7#
      • 1...Bxd4
        • 2.Qxe7#
      • 1...f5
        • 2.Qxe7#
      • 1...f6
        • 2.Qxe7#
      • 1...Rh7
        • 2.Qxe7#
      • 1...Rf8
        • 2.Qxe7#
      • 1...Rg8
        • 2.Qxe7#
      • 1...e6
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • R(e);N_GUARD,XB(B)::R(D)
    • R(e);N_GUARD::R(D)
    • R(e);N_GUARD::R(D),XR(e)
    • B(a);N_GUARD::QAR(C),XR(g)
    • P(d);OGATEB::QAB(C)
  • Tries
    • Try
      • S(F);CHECK,P_PINP(c)
      • Vars
        • K(f);N_SPINP(c),P-FLIGHT::B(B)+R(D),DCHECK
      • Refutation
        • K(f);N_SPINP(c),P-FLIGHT
  • Actual
    • S(F);P_PINP(c)
    • Threat
      • DUALS(2)
    • Vars
      • K(f);N_SPINP(c),P-FLIGHT::QAR2(C),XR(g)
      • R(g);XP(G)::QAR1(C),XP(c)
      • B(a);XS(F)::QAR1(C),XP(c)
      • P(d);::QAR1(C),XP(c)
      • R(g);::QAR1(C),XP(c)
      • P(c);::QAR(C),XR(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).