MESON Chess Problem Database

Problem Display
PID: 47023 (4R3/2q5/4pB2/r5Q1/NRnpkp1N/4Pp1K/B1P2P2/3rb3 w - - 0 1)

Lecomte, Roland

Themes-64, 1956

4R3/2q5/4pB2/r5Q1/NRnpkp1N/4Pp1K/B1P2P2/3rb3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Ra6
      • 2.Qf5#
    • 1...Ra7
      • 2.Qf5#
    • 1...Ra8
      • 2.Qf5#
    • 1...Sd2
      • 2.Rxd4#
    • 1...Se5
      • 2.Qxf4#
    • 1...Sd6
      • 2.Qxf4#
  • Tries
    • 1.Qg6+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Kd5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxf3#
      • 1...Kd5
        • 2.Qxe6#
      • 1...Sd2
        • 2.Rxd4#
      • 1...Se5
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(h);N_GUARD,XS(F)::QAB1(I)
    • R(h);N_GUARD::QAB1(I),XR(h)
    • R(h);N_GUARD::QAB1(I)
    • S(d);N_SPINP(i),OGATE,P_SPINP(e)::R1(G),XP(e)
    • S(d);N_SPINP(i),P_SPINP(e),S_CUTQ(j)::QAR1(I),XP(g)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(I),XR(h)
      • Refutation
        • K(f);N_SPINP(i),P_SPINS(d),S_FLIGHT
  • Actual
    • Q(I);N_PINP(i),P_PINP(g)
    • Threat
      • QAB1(I),XP(c)
    • Vars
      • K(f);N_SPINP(g),P_SPINS(d),S_FLIGHT::QAB1(I),XP(i)
      • S(d);N_SPINP(g),OGATE,P_SPINP(e)::R1(G),XP(e)
      • S(d);N_SPINP(g),P_SPINP(e),S_CUTQ(j)::QAR1(I),XP(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).