MESON Chess Problem Database

Problem Display
PID: 165146 (K1B3b1/BR3p1r/2NkPP1p/1P1pp2R/P3n3/8/1N2Q3/8 w - - 0 1)

Wirtanen, Erkki Aukusti

Die Schwalbe, 1970

K1B3b1/BR3p1r/2NkPP1p/1P1pp2R/P3n3/8/1N2Q3/8

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxe5#
    • 1...Sf2
      • 2.Qxe5#
    • 1...Sc3
      • 2.Qxe5#
    • 1...Sg3
      • 2.Qxe5#
    • 1...Sc5
      • 2.Bb8#
      • 2.Qxe5#
    • 1...Sg5
      • 2.Qxe5#
    • 1...Sxf6
      • 2.Qxe5#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Rd7#
      • 1...Sxf6
        • 2.Qxe5#
      • 1...Sc5
        • 2.Bb8#
        • 2.Qxe5#
      • 1...fxe6!
    • 1.Bc5+?
      • 1...Sxc5
        • 2.Qxe5#
      • 1...Kxc5!
    • 1.Qd3?
      • threat
        • 2.Sc4#
      • 1...Sd2
        • 2.Qa3#
      • 1...d4!
    • 1.Qg4?
      • threat
        • 2.Rd7#
      • 1...Sxf6
        • 2.Qb4#
      • 1...Sc5
        • 2.Bb8#
      • 1...fxe6!
    • 1.Qxe4?
      • threat
        • 2.Qb4#
        • 2.Qxe5#
      • 1...d4
        • 2.Sc4#
        • 2.Qxe5#
      • 1...dxe4!
    • 1.e7?
      • threat
        • 2.e8S#
      • 1...Sxf6
        • 2.Qxe5#
      • 1...d4!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sf5#
      • 1...fxe6
        • 2.Rd7#
      • 1...Sg3
        • 2.Qxe5#
      • 1...d4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(a);OGATE::QAB1(B),XP(c)
    • S(a);OGATE,XP(H)::QAB1(B),XP(c)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(J)
      • Vars
        • S(a);OGATE,XP(H)::QAB1(B),XP(c)
      • Refutation
        • P(f);XP(G)
    • Try
      • B(I);CHECK
      • Vars
        • S(a);OGATE,SBLOCK,XB(I)::QAB1(B),XP(c)
      • Refutation
        • K(d);S_FLIGHT,XB(I)
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • S(A)
      • Vars
        • S(a);N_GUARD::QAB(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • R1(J)
      • Vars
        • S(a);OGATE,XP(H)::QAB(B)
        • S(a);SBLOCK::B(I)
      • Refutation
        • P(f);XP(G)
    • Try
      • Q(B);XS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XQ(B)
    • Try
      • P(G);
      • Threat
        • P=S
      • Vars
        • S(a);OGATE,XP(H)::QAB1(B),XP(c)
      • Refutation
        • P(b);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • P(f);SBLOCK,XP(G)::R1(J)
      • S(a);OGATE::QAB1(B),XP(c)
      • P(b);N_GUARD::S(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).