MESON Chess Problem Database

Problem Display
PID: 145502 (2K2BN1/1p4p1/1bp1Q3/5P2/3k4/Np6/1Pqn1P2/1BRR1b2 w - - 0 1)

Ruck, Ferenc

Magyar Sakkvilag, 1932

2K2BN1/1p4p1/1bp1Q3/5P2/3k4/Np6/1Pqn1P2/1BRR1b2

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qc4#
    • 1...Qxd1
      • 2.Bxg7#
      • 2.Qd6#
    • 1...Qd3
      • 2.Bxg7#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qxc1
      • 2.Qe4#
      • 2.Qd6#
    • 1...Qxb2
      • 2.Bxg7#
      • 2.Qe4#
      • 2.Qd6#
    • 1...Qc3
      • 2.Qe4#
      • 2.Qd6#
      • 2.bxc3#
    • 1...Qc4
      • 2.Qe4#
    • 1...Qc5
      • 2.Qe4#
  • Tries
    • 1.Bxg7+?
      • 1...Kd3
        • 2.Qc4#
      • 1...Kc5!
    • 1.Rxd2+?
      • 1...Qd3
        • 2.Bxg7#
        • 2.Rc4#
      • 1...Qxd2
        • 2.Bxg7#
        • 2.Qe4#
        • 2.Qd6#
      • 1...Bd3!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qe3#
      • 1...Kd3
        • 2.Qc4#
      • 1...Kc5
        • 2.Sxc6#
      • 1...Qxf5
        • 2.Sxf5#
      • 1...Qd3
        • 2.Bxg7#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qc3
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(e);P-FLIGHT,P_SPINQ(b)::QAB1(H)
    • Q(b);N_SPINS(c)::B(J),XP(i)
    • Q(b);N_GUARD::QAR1(H),XQ(b)
    • Q(b);N_GUARD::QAR1(H)
  • Tries
    • Try
      • B(J);CHECK,XP(i)
      • Vars
        • K(e);P-FLIGHT,P_SPINQ(b)::QAB1(H)
      • Refutation
        • K(e);N_SPINS(c),P_SPINQ(b),S_FLIGHT
    • Try
      • R(C);CHECK,XS(c)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(K);
    • Threat
      • QAB1(H)
    • Vars
      • K(e);P-FLIGHT,P_SPINQ(b)::QAB1(H)
      • K(e);N_SPINS(c),P_SPINQ(b),S_FLIGHT::B(J)+S(K),XP(g)
      • Q(b);P_PINQ(H),XP(G)::S(K),XQ(b)
      • Q(b);N_SPINS(c)::B(J),XP(i)
      • Q(b);N_GUARD::QAR1(H),XQ(b)
      • Q(b);::QAR2(H)
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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).