MESON Chess Problem Database

Problem Display
PID: 142968 (1R2rr1b/1b1Q2B1/p4n2/3Pq3/2Pk2BR/2NNp3/2K1P3/8 w - - 0 1)

Beck, Friedrich

5th Comm., BCF 060. Ty., 1948-1949

1R2rr1b/1b1Q2B1/p4n2/3Pq3/2Pk2BR/2NNp3/2K1P3/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qa4#
    • 1...Qxd5
      • 2.Be6#
    • 1...Qe6
      • 2.Bxe6#
    • 1...Qe7
      • 2.Be6#
    • 1...Sxd5
      • 2.Bf5#
    • 1...Sxd7
      • 2.Bf5#
    • 1...Sh7
      • 2.Bf5#
    • 1...Sg8
      • 2.Bf5#
  • Tries
    • 1.Be6+?
      • 1...Qf4
        • 2.Rxf4#
      • 1...Qe4
        • 2.Rxe4#
      • 1...Se4
        • 2.Rxe4#
      • 1...Sg4!
    • 1.Qa4?
      • threat
        • 2.c5#
      • 1...Qxd5
        • 2.cxd5#
      • 1...Bxd5
        • 2.cxd5#
      • 1...Sxd5
        • 2.cxd5#
      • 1...Bc6!
  • Keys
    • 1.c5!
      • threat
        • 2.Qa4#
      • 1...Kc4
        • 2.Qa4#
      • 1...Qxd5
        • 2.Be6#
      • 1...Bxd5
        • 2.Rb4#
      • 1...Sxd5
        • 2.Bf5#
      • 1...Sxd7
        • 2.Bf5#
      • 1...Bc6
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(E)::QAR2(I)
    • Q(c);N_GUARD,P_SPINQ(c),P_SPINS(e),XP(H)::R(G)+B(F)
    • Q(c);N_GUARD,P_SPINS(e)::R(G)+B(F),XQ(c)
    • Q(c);N_GUARD,P_SPINS(e)::R(G)+B(F)
    • S(e);N_GUARD,P_SPINQ(c),P_SPINS(e),XP(H)::R(G)+B(F)
    • S(e);N_GUARD,P_SPINQ(c),XQ(I)::R(G)+B(F)
    • S(e);N_GUARD,P_SPINQ(c)::R(G)+B(F)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c),P_SPINS(e)::R(G),XQ(c)
        • Q(c);N_GUARD,P_PINS(D),P_SPINQ(c),P_SPINS(e)::R1(G),XQ(c)
        • S(e);N_GUARD,P_SPINQ(c),P_SPINS(e)::R1(G),XS(e)
      • Refutation
        • S(e);P_SPINQ(c),P_SPINS(e)
    • Try
      • Q(I);
      • Threat
        • QAR(I)+P(E)
      • Vars
        • Q(c);OGATE,P_SPINS(e),XP(H)::QAR(I)+P(E),XQ(c)
        • B(f);OGATE,XP(H)::QAR(I)+P(E),XB(f)
        • S(e);OGATE,P_SPINQ(c),XP(H)::QAR(I)+P(E),XS(e)
      • Refutation
        • B(f);
  • Actual
    • P(E);
    • Threat
      • QAR(I)
    • Vars
      • K(b);P-FLIGHT::QAR2(I)
      • Q(c);N_GUARD,P_SPINQ(c),P_SPINS(e),XP(H)::R(G)+B(F)
      • B(f);OGATE,P_SPINB(f),XP(H)::R(K)
      • S(e);N_GUARD,P_SPINQ(c),P_SPINS(e),XP(H)::R(G)+B(F)
      • S(e);N_GUARD,P_SPINQ(c),XQ(I)::R(G)+B(F)
      • B(f);OGATE::R(K)
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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).