MESON Chess Problem Database

Problem Display
PID: 104559 (8/4p3/4pp2/5R1p/1Np1P3/1pP1kP2/1P1nPp1N/1nQK1B2 w - - 0 1)

Riczu, Lajos

Praca, 1952

8/4p3/4pp2/5R1p/1Np1P3/1pP1kP2/1P1nPp1N/1nQK1B2

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qxd2#
    • 1...Sxc3+
      • 2.Qxc3#
    • 1...h4
      • 2.Sg4#
    • 1...exf5
      • 2.Sd5#
    • 1...e5
      • 2.Sd5#
  • Tries
    • 1.Rxf6?
      • 1...Sxc3+
        • 2.Qxc3#
      • 1...e5
        • 2.Sd5#
      • 1...Sa3
        • 2.Qxd2#
      • 1...h4
        • 2.Sg4#
      • 1...exf6!
    • 1.Qxb1?
      • 1...Sxf1
        • 2.Sxf1#
      • 1...Sxf3
        • 2.Rxf3#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...exf5
        • 2.Sd5#
      • 1...e5
        • 2.Sd5#
      • 1...h4
        • 2.Sg4#
      • 1...Sxb1!
    • 1.e5?
      • 1...Sxc3+
        • 2.Qxc3#
      • 1...exf5
        • 2.Sd5#
      • 1...Sa3
        • 2.Qxd2#
      • 1...h4
        • 2.Sg4#
      • 1...fxe5!
  • Keys
    • 1.Qc2!
      • 1...Sxc3+
        • 2.Qxc3#
      • 1...bxc2+
        • 2.Sxc2#
      • 1...Sxf1
        • 2.Sxf1#
      • 1...Sxf3
        • 2.Rxf3#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...exf5
        • 2.Sd5#
      • 1...e5
        • 2.Sd5#
      • 1...Sa3
        • 2.Qxd2#
      • 1...h4
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(A),XS(b)
    • S(a);CHECK,OGATE,XP(G)::QAR2(A),XS(a)
    • P(g);N_GUARD::S(F)
    • P(h);N_GUARD,XR(K)::S(I)
    • P(h);N_GUARD::S(I)
  • Tries
    • Try
      • R(K);XP(i)
      • Vars
        • S(a);CHECK,OGATE,XP(G)::QAR2(A),XS(a)
        • P(h);N_GUARD::S(I)
        • S(a);N_GUARD::QAB1(A),XS(b)
        • P(g);N_GUARD::S(F)
      • Refutation
        • P(j);XR(K)
    • Try
      • Q(A);N_PINS(b),XS(a)
      • Vars
        • S(b);XB(C)::S(F),XS(b)
        • S(b);OGATE,XP(H)::R1(K),XS(b)
        • S(b);OGATE,XP(J)::QAR1(A),XS(b)
        • P(h);N_GUARD,XR(K)::S(I)
        • P(h);N_GUARD::S(I)
        • P(g);N_GUARD::S(F)
      • Refutation
        • S(b);XQ(A)
    • Try
      • P(J);
      • Vars
        • S(a);CHECK,OGATE,XP(G)::QAR2(A),XS(a)
        • P(h);N_GUARD,XR(K)::S(I)
        • S(a);N_GUARD::QAB1(A),XS(b)
        • P(g);N_GUARD::S(F)
      • Refutation
        • P(i);XP(J)
  • Actual
    • Q(A);N_PINS(b)
    • Vars
      • S(a);CHECK,OGATE,XP(G)::QAR2(A),XS(a)
      • P(d);CHECK,XQ(A)::S(I),XP(d)
      • S(b);XB(C)::S(F),XS(b)
      • S(b);OGATE,XP(H)::R1(K),XS(b)
      • S(b);OGATE,XP(J)::QAR1(A),XS(b)
      • P(h);N_GUARD,XR(K)::S(I)
      • P(h);N_GUARD::S(I)
      • S(a);N_GUARD::QAB1(A),XS(b)
      • P(g);N_GUARD::S(F)
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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).