MESON Chess Problem Database

Problem Display
PID: 96668 (5R2/8/1r6/2p1P3/2P1k1N1/2B1p2p/P3P2p/K3Q1br w - - 0 1)

Riczu, Lajos

Problemas, 1974

5R2/8/1r6/2p1P3/2P1k1N1/2B1p2p/P3P2p/K3Q1br

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1+
      • 2.Qxb1#
    • 1...Ra6
      • 2.Qb1#
    • 1...Rc6
      • 2.Qb1#
    • 1...Re6
      • 2.Qb1#
    • 1...Rg6
      • 2.Qb1#
    • 1...Rh6
      • 2.Qb1#
    • 1...Bf2
      • 2.Qxh1#
  • Tries
    • 1.Sf2+?
      • 1...Bxf2
        • 2.Qxh1#
      • 1...exf2!
    • 1.Sxh2?
      • threat
        • 2.Qh4#
      • 1...Rb1+
        • 2.Qxb1#
      • 1...Bxh2
        • 2.Qxh1#
      • 1...Rg6
        • 2.Qb1#
      • 1...Rh6
        • 2.Qb1#
      • 1...Bf2
        • 2.Qxh1#
      • 1...Rf6!
    • 1.Sh6?
      • threat
        • 2.Qh4#
      • 1...Rb1+
        • 2.Qxb1#
      • 1...Rxh6
        • 2.Qb1#
      • 1...Rg6
        • 2.Qb1#
      • 1...Bf2
        • 2.Qxh1#
      • 1...Rf6!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Rf4#
        • 2.Qf3#
        • 2.Qf4#
        • 2.Qf5#
      • 1...Rb1+
        • 2.Qxb1#
      • 1...Rf6
        • 2.Sxf6#
      • 1...Bf2
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(h);CHECK,N_GUARD::QAB(B),XR(h)
    • R(h);N_GUARD,P_PINP(C)::QAB(B)
    • R(h);N_GUARD::QAB(B)
    • B(a);OGATE,P_PINQ(B)::QAB(B),XR(b)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • B(a);OGATE,P_PINQ(B),XS(G)::QAB(B),XR(b)
      • Refutation
        • P(d);XS(G)
    • Try
      • S(G);XP(c)
      • Threat
        • QAR(B)
      • Vars
        • R(h);CHECK,N_GUARD::QAB(B),XR(h)
        • B(a);OGATE,P_PINQ(B),XS(G)::QAB(B),XR(b)
        • R(h);N_GUARD::QAB(B)
        • B(a);OGATE,P_PINQ(B)::QAB(B),XR(b)
      • Refutation
        • R(h);
    • Try
      • S(G);
      • Threat
        • QAR(B)
      • Vars
        • R(h);CHECK,N_GUARD::QAB(B),XR(h)
        • R(h);N_GUARD,XS(G)::QAB(B)
        • R(h);N_GUARD::QAB(B)
        • B(a);OGATE,P_PINQ(B)::QAB(B),XR(b)
      • Refutation
        • R(h);
  • Actual
    • Q(B);
    • Threat
      • DUALS(4)
    • Vars
      • R(h);CHECK,N_GUARD::QAB(B),XR(h)
      • R(h);N_GUARD::S(G),XR(h)
      • B(a);OGATE,P_PINQ(B)::QAB(B),XR(b)
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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).