MESON Chess Problem Database

Problem Display
PID: 72762 (n1R1B3/1Np5/KP4N1/1p1r1p2/2knp2R/Ppq2p2/1b1PP3/2Q3B1 w - - 0 1)

Froberg, Johan Hilding Laurentius

2nd Prize, Springaren, 1998

n1R1B3/1Np5/KP4N1/1p1r1p2/2knp2R/Ppq2p2/1b1PP3/2Q3B1

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bxa3
      • 2.Qxc3#
    • 1...Se6
      • 2.Sa5#
    • 1...e3
      • 2.d3#
    • 1...c5
      • 2.Sa5#
  • Tries
    • 1.Bxb5+?
      • 1...Sxb5
        • 2.Sa5#
      • 1...Rxb5!
    • 1.Rxc7+?
      • 1...Rc5
        • 2.Rxc5#
      • 1...Sc6
        • 2.Sa5#
      • 1...Sxc7+!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Se5#
      • 1...Bxa3
        • 2.Qxc3#
      • 1...Sc2
        • 2.Sd6#
      • 1...Sc6
        • 2.d3#
      • 1...Se6
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD,XP(E)::QAR1(A),XQ(c)
    • S(f);N_SPINP(k),P_SPINP(g)::S(J)
    • P(g);N_GUARD,P_SPINS(f)::P(C)
    • P(k);::S(J)
  • Tries
    • Try
      • B(L);CHECK,XP(h)
      • Vars
        • S(f);N_SPINP(k),P_SPINP(g),XB(L)::S(J)
      • Refutation
        • R(i);XB(L)
    • Try
      • R(K);CHECK,XP(k)
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::R1(K),XR(i)
        • S(f);P_SPINP(g),P_SPINS(f)::S(J)
      • Refutation
        • S(l);CHECK,XR(K)
  • Actual
    • B(L);P_PINR(i)
    • Threat
      • S(I)
    • Vars
      • B(a);N_GUARD,XP(E)::QAR1(A),XQ(c)
      • S(f);N_SPINP(k),N_SPINQ(c),P_SPINP(g)::S(J)
      • S(f);N_SPINP(k),P_SPINP(g)::P(C)
      • S(f);N_SPINP(k),N_SPINR(i),P_SPINP(g)::S(J)
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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).