MESON Chess Problem Database

Problem Display
PID: 43627 (1rn4R/1q3Np1/6k1/8/4R1P1/3Q4/B1P5/B6K w - - 0 1)

Tuxen, Harri Viggo

De Problemist, 1930

1rn4R/1q3Np1/6k1/8/4R1P1/3Q4/B1P5/B6K

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.Qxe4#
    • 1...Qb1+
      • 2.Re1#
    • 1...Qb2
      • 2.Rf4#
    • 1...Qb4
      • 2.Rxb4#
    • 1...Qb6
      • 2.Re1#
      • 2.Re2#
      • 2.Re3#
      • 2.Ra4#
      • 2.Rb4#
      • 2.Rf4#
      • 2.Re7#
      • 2.Ree8#
    • 1...Qa7
      • 2.Re1#
      • 2.Re2#
      • 2.Re3#
      • 2.Ra4#
      • 2.Rb4#
      • 2.Rf4#
      • 2.Re7#
      • 2.Ree8#
    • 1...Qc7
      • 2.Re1#
      • 2.Re2#
      • 2.Re3#
      • 2.Ra4#
      • 2.Rb4#
      • 2.Rf4#
      • 2.Re7#
      • 2.Ree8#
    • 1...Qe7
      • 2.Rxe7#
    • 1...Sb6
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qd6#
    • 1...Se7
      • 2.Qd6#
  • Tries
    • 1.Rg8?
      • threat
        • 2.Rxg7#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qb1+
        • 2.Re1#
      • 1...Kh7
        • 2.Rxg7#
      • 1...Qb2
        • 2.Rf4#
      • 1...Qxf7!
  • Keys
    • 1.Rh5!
      • threat
        • 2.Sh8#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qb1+
        • 2.Re1#
      • 1...Qxf7
        • 2.Re6#
      • 1...Qb2
        • 2.Rf4#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sa7
        • 2.Qd6#
      • 1...Se7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XR(F)::QAB(E),XQ(b)
    • Q(b);CHECK,N_PINR(F)::QAB(E)+R(F)
    • Q(b);N_PINR(F)::QAB(E)+R(F)
    • Q(b);N_PINR(F)::QAB(E)+R(F),XQ(b)
    • S(e);N_GUARD::QAR(E)
    • S(e);N_GUARD::QAR(E),XS(e)
  • Tries
    • Try
      • R(I);P_PINP(c)
      • Threat
        • R1(I),XP(c)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XR(F)::QAB(E),XQ(b)
        • Q(b);CHECK,N_PINR(F)::QAB(E)+R(F)
        • K(a);N_SPINP(c),S_FLIGHT::R1(I),XP(c)
        • Q(b);N_PINR(F)::QAB(E)+R(F)
      • Refutation
        • Q(b);N_PINR(F),XS(H)
  • Actual
    • R(I);
    • Threat
      • S(H)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XR(F)::QAB(E),XQ(b)
      • Q(b);CHECK,N_PINR(F)::QAB(E)+R(F)
      • Q(b);N_PINR(F),SBLOCK,XS(H)::QAB(E)+R(F),DCHECK
      • Q(b);N_PINR(F)::QAB(E)+R(F)
      • S(e);N_GUARD::QAR(E)
      • S(e);N_GUARD::QAR(E),XS(e)
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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).