MESON Chess Problem Database

Problem Display
PID: 137590 (R2rk1q1/R4p1n/K3P1r1/1pB3pB/8/7p/4Q3/5b2 w - - 0 1)

Fegan, Bertram George

3rd Prize, Sports Referee, 0000

R2rk1q1/R4p1n/K3P1r1/1pB3pB/8/7p/4Q3/5b2

#2

7 + 10

881 The Australasian Chess Review 1929

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6+
      • 2.Qxe6#
    • 1...Rg7
      • 2.exf7#
    • 1...Rxa8
      • 2.Rxa8#
    • 1...Rb8
      • 2.Rxb8#
    • 1...Rc8
      • 2.Rxc8#
    • 1...Sf6
      • 2.exf7#
    • 1...Sf8
      • 2.Re7#
  • Tries
    • 1.Rd7?
      • threat
        • 2.Rdxd8#
        • 2.Raxd8#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...fxe6
        • 2.Raxd8#
      • 1...Rb8
        • 2.Rxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rxa8+!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Bc6#
      • 1...Rxa8
        • 2.Rxa8#
      • 1...Rb8
        • 2.Rxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Bg2
        • 2.Qxb5#
      • 1...Sf6
        • 2.exf7#
      • 1...Sf8
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(e);CHECK,N_SPINR(h),OGATE,P_SPINP(f),P_SPINR(e),XP(E)::QAR2(A),XR(e)
    • R(e);N_PINP(E),P_SPINP(f)::QAR(A)+P(E)DCHECK,XP(f)
    • R(h);N_SPINR(h),OGATE,P_PINR(F),XR(G)::R(F),XR(h)
    • R(h);OGATEB::R(G),XR(h)
    • S(g);N_PINP(E)::QAR(A)+P(E)DCHECK,XP(f)
    • S(g);SBLOCK::R1(F)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,N_SPINR(h),OGATE,P_SPINP(f),P_SPINR(e),XP(E)::QAR2(A),XR(e)
        • P(f);N_SPINR(h),P_SPINP(f),P_SPINR(e),XP(E)::R1(G),XR(h)
        • R(h);OGATEB::R(G),XR(h)
      • Refutation
        • R(h);CHECK,N_SPINR(h),XR(G)
  • Actual
    • B(C);
    • Threat
      • B(C)
    • Vars
      • R(h);N_SPINR(h),OGATE,P_PINR(F),XR(G)::R(F),XR(h)
      • R(h);OGATEB::R(G),XR(h)
      • B(a);N_GUARD::QAB(A),XP(c)
      • S(g);N_PINP(E)::QAR(A)+P(E)DCHECK,XP(f)
      • S(g);SBLOCK::R1(F)
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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).