MESON Chess Problem Database

Problem Display
PID: 9350 (2n5/1B1p4/3kNQ2/r1p4K/p4Ppp/B1R3r1/1Rp2pp1/8 w - - 0 1)

Blake, Percy Francis

HM., Brighton Society, 1901

2n5/1B1p4/3kNQ2/r1p4K/p4Ppp/B1R3r1/1Rp2pp1/8

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Rxd3#
    • 1...Ra6
      • 2.Bxc5#
    • 1...Ra7
      • 2.Bxc5#
    • 1...Ra8
      • 2.Bxc5#
    • 1...Sb6
      • 2.Rxb6#
    • 1...Se7
      • 2.Qe5#
    • 1...dxe6
      • 2.Qd8#
  • Tries
    • 1.Rxc5?
      • threat
        • 2.Sd4#
        • 2.Sg5#
        • 2.Sc7#
        • 2.Sg7#
        • 2.Sd8#
        • 2.Sf8#
        • 2.Rd5#
      • 1...Rxc5+
        • 2.Bxc5#
      • 1...dxe6
        • 2.Qd8#
      • 1...Re3
        • 2.Rd5#
      • 1...Rxa3!
    • 1.Qf8+?
      • 1...Se7
        • 2.Rb6#
      • 1...Kxe6!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Rd4#
      • 1...cxb4+
        • 2.Sg5#
      • 1...c4+
        • 2.Rb5#
      • 1...dxe6
        • 2.Qd8#
      • 1...Rd3
        • 2.Rxd3#
      • 1...Sb6
        • 2.Rxb6#
      • 1...Se7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD::R(C),XR(d)
    • R(h);N_GUARD::B(B),XP(i)
    • S(l);N_GUARD::R(A),XS(l)
    • S(l);SBLOCK::QAB1(G)
    • P(k);OGATEB,SBLOCK,XS(F)::QAR2(G)
  • Tries
    • Try
      • R(C);P_SPINR(C),XP(i)
      • Threat
        • DUALS(7)
      • Vars
        • R(h);CHECK,OGATE,P_SPINR(h),XR(C)::B(B),XR(h)
        • P(k);OGATEB,P_SPINP(k),SBLOCK,XS(F)::QAR2(G)
        • R(d);::B(B)+R(C),DCHECK
      • Refutation
        • R(d);XB(B)
    • Try
      • Q(G);CHECK
      • Vars
        • S(l);P_SPINS(l)::R(A)
      • Refutation
        • K(j);N_SPINP(i),P-FLIGHT,XS(F)
  • Actual
    • R(A);N_PINP(i)
    • Threat
      • R(A)
    • Vars
      • P(i);CHECK,P_SPINP(i),XR(A)::QAR(G)+S(F)
      • P(i);CHECK,OGATEB::B(B)+R(A)
      • P(k);OGATEB,P_SPINP(k),SBLOCK,XS(F)::QAR2(G)
      • R(d);N_GUARD::R(C),XR(d)
      • S(l);N_GUARD::R(A),XS(l)
      • S(l);SBLOCK::QAB1(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).