MESON Chess Problem Database

Problem Display
PID: 250983 (2nr1B2/1p1QnB2/p2r2p1/P1k2pR1/p2NR3/P3P2p/3K1N1b/5b2 w - - 0 1)

Kovacs, Norbert

Die Schwalbe, 1930

2nr1B2/1p1QnB2/p2r2p1/P1k2pR1/p2NR3/P3P2p/3K1N1b/5b2

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4+
      • 2.exd4#
    • 1...Re6
      • 2.Sxe6#
    • 1...Bg2
      • 2.Sd3#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Sd5
      • 2.Se6#
    • 1...Sg8
      • 2.Qc7#
  • Tries
    • 1.Re5+?
      • 1...Rd5
        • 2.Qc7#
      • 1...Sd5
        • 2.Qc7#
      • 1...Bxe5!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Se4#
      • 1...Rxd4+
        • 2.exd4#
      • 1...Rd5
        • 2.Qc7#
      • 1...Re6
        • 2.Sxe6#
      • 1...Sd5
        • 2.Se6#
      • 1...Bg2
        • 2.Sd3#
      • 1...Bd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(h);CHECK,OGATE,P_SPINS(k),XS(E)::P(D),XR(h)
    • R(h);N_PINS(E),P_SPINS(k)::S(E),XR(h)
    • B(a);N_GUARD::S(B)
    • B(a);N_GUARD,N_PINS(E)::S(B),XB(a)
    • S(k);N_PINS(E),N_SPINP(f),P_SPINR(h),SBLOCK::S(E)
    • S(k);N_GUARD,P_SPINR(h)::QAR2(I)
  • Tries
    • Try
      • R(F);CHECK,N_PINP(f)
      • Vars
        • R(h);P_SPINR(h),P_SPINS(k)::QAR2(I)
        • S(k);N_PINS(E),P_SPINR(h),P_SPINS(k)::QAR2(I)
      • Refutation
        • B(b);XR(F)
  • Actual
    • R(F);
    • Threat
      • S(B)
    • Vars
      • R(h);CHECK,OGATE,P_SPINS(k),XS(E)::P(D),XR(h)
      • R(h);N_GUARD,N_SPINP(f),P_SPINS(k)::QAR2(I)
      • R(h);N_PINS(E),P_SPINS(k)::S(E),XR(h)
      • S(k);N_PINS(E),N_SPINP(f),P_SPINR(h),SBLOCK::S(E)
      • B(a);N_GUARD::S(B)
      • B(a);N_GUARD,N_PINS(E)::S(B),XB(a)
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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).