MESON Chess Problem Database

Problem Display
PID: 186727 (6R1/8/Q6p/3p3B/6nR/1N2k3/2p1PnK1/3qN3 w - - 0 1)

Benthall, Paul

Chess, 1960

6R1/8/Q6p/3p3B/6nR/1N2k3/2p1PnK1/3qN3

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sh2
      • 2.Qxh6#
    • 1...Se5
      • 2.Qxh6#
    • 1...Sf6
      • 2.Rg3#
  • Tries
    • 1.Re8+?
      • 1...Kf4
        • 2.Qf6#
      • 1...Se5
        • 2.Qxh6#
      • 1...Se4!
    • 1.Qe6+?
      • 1...Kf4
        • 2.e3#
      • 1...Se5
        • 2.Rg3#
        • 2.Qxh6#
      • 1...Se4!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qf3#
      • 1...Kxe2
        • 2.Qxf2#
      • 1...Ke4
        • 2.Re8#
      • 1...Qxe2
        • 2.Qd4#
      • 1...Sxf6
        • 2.Rg3#
      • 1...Sh2
        • 2.Qxf2#
        • 2.Qf4#
        • 2.Qxh6#
      • 1...Se5
        • 2.Qxf2#
        • 2.Qf4#
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(e);N_GUARD::QAB(G),XP(g)
    • S(e);OGATE::R(H)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(d);P_SPINS(e),S_FLIGHT::QAR2(G)
        • S(e);P_SPINS(e)::QAB(G),XP(g)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);OGATE,P_SPINS(e),S_FLIGHT::P(B)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(e),XP(B)::QAR1(G),XS(c)
      • K(d);P-FLIGHT,P_SPINS(e)::R(H)
      • Q(a);N_GUARD,SBLOCK,XP(B)::QAB1(G)
      • S(e);OGATE,XQ(G)::R(H)
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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).