MESON Chess Problem Database

Problem Display
PID: 235765 (1B6/3Q4/1R1p4/3rP2p/Rprk4/2pN1K2/2P5/8 w - - 0 1)

Lipton, Michael

The Problemist Supplement, 2020

1B6/3Q4/1R1p4/3rP2p/Rprk4/2pN1K2/2P5/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...h4
      • 2.Qg4#
    • 1...dxe5
      • 2.Bxe5#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qe4#
        • 2.Qf4#
      • 1...dxe5
        • 2.Qe4#
      • 1...Ra5
        • 2.Qe4#
      • 1...Rb5
        • 2.Qe4#
      • 1...Rdc5
        • 2.Qe4#
      • 1...Rxe5!
  • Keys
    • 1.Ba7!
      • 1...Rxe5
        • 2.Rxd6#
      • 1...dxe5
        • 2.Rbxb4#
      • 1...Rcc5
        • 2.Rbxb4#
      • 1...Rc6
        • 2.Rbxb4#
      • 1...Rc7
        • 2.Rbxb4#
      • 1...Rc8
        • 2.Rbxb4#
      • 1...Ra5
        • 2.Rxd6#
      • 1...Rb5
        • 2.Rxd6#
      • 1...Rdc5
        • 2.Rxd6#
      • 1...b3
        • 2.Rxd6#
      • 1...h4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(f);N_GUARD::QAR(G)
    • P(g);OGATE,P_SPINR(e),XP(E)::B(H),XP(g)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);XP(E)::QAR1(G)
        • R(e);::QAR1(G)
      • Refutation
        • R(e);XP(E)
  • Actual
    • B(H);
    • Vars
      • R(e);P_SPINP(g),XP(E)::B(H)+R(F),DCHECK,XP(g)
      • P(g);P_SPINR(e),XP(E)::B(H)+R(F),XP(b)
      • R(c);P_SPINP(b),S_CUTR(e)::R(F),XP(b)
      • R(c);P_SPINP(b)::B(H)+R(F),DCHECK,XP(b)
      • R(e);P_SPINP(g)::B(H)+R(F),DCHECK,XP(g)
      • R(e);P_SPINP(g),S_CUTR(c)::R(F),XP(g)
      • P(b);P_SPINR(c)::B(H)+R(F),XP(g)
      • P(f);N_GUARD::QAR(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).