MESON Chess Problem Database

Problem Display
PID: 90325 (1K3R2/6N1/1R1pPp2/4k1n1/1Np4P/p4b1p/1r1Q4/B7 w - - 0 1)

Schneider, Michael

Die Schwalbe, 1964

1K3R2/6N1/1R1pPp2/4k1n1/1Np4P/p4b1p/1r1Q4/B7

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qxd6#
    • 1...Se4
      • 2.Sc6#
  • Tries
    • 1.Sc6+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Bxc6!
    • 1.Rxd6?
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd4#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Be4
        • 2.Qh2#
      • 1...Se4
        • 2.Rd5#
      • 1...Bd5!
  • Keys
    • 1.Rxf6!
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxf6
        • 2.Qxg5#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Be4
        • 2.Qc3#
      • 1...Se4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::QAB1(B),XP(h)
    • S(g);SBLOCK,S_CUTB(c)::S(C)
  • Tries
    • Try
      • S(C);CHECK,P_SPINR(E)
      • Vars
        • K(f);N_SPINR(a),P-FLIGHT::QAR1(B)
      • Refutation
        • B(c);XS(C)
    • Try
      • R(E);P_SPINS(C),XP(h)
      • Threat
        • QAB1(B)
      • Vars
        • K(f);N_SPINR(a),P-FLIGHT::QAR1(B)
        • S(g);OGATE,XP(F)::R1(E),XS(g)
        • B(c);SBLOCK::QAB(B)
        • S(g);SBLOCK,S_CUTB(c)::R1(E)
      • Refutation
        • B(c);
  • Actual
    • R(I);XP(i)
    • Threat
      • QAB1(B)
    • Vars
      • K(f);N_SPINR(a),P-FLIGHT::QAR1(B)
      • K(f);S_FLIGHT,XR(I)::QAB1(B),XS(g)
      • S(g);OGATE,XP(F)::R1(I),XS(g)
      • B(c);SBLOCK::QAB(B)
      • S(g);SBLOCK::R1(I)
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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).