MESON Chess Problem Database

Problem Display
PID: 136761 (n3r3/Q3p2B/1nN1P3/1K6/R1pNpk2/4p1R1/2P1P2P/B7 w - - 0 1)

Paslack, Rainer

Die Schwalbe, 2010

n3r3/Q3p2B/1nN1P3/1K6/R1pNpk2/4p1R1/2P1P2P/B7

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7+
      • 2.Qxc7#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Be5#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...c3
        • 2.Rxe4#
      • 1...Sd7!
    • 1.Sf5?
      • threat
        • 2.Be5#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Sd7
        • 2.Qxe3#
      • 1...c3!
    • 1.Bf5?
      • threat
        • 2.Rg4#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Rg8!
    • 1.Qb8+?
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Rxb8!
    • 1.Qxe7?
      • threat
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qf7#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Rd8
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qf6#
        • 2.Qf7#
      • 1...Rf8
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qd6#
        • 2.Qxf8#
      • 1...Rg8
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qf7#
      • 1...Sd5
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qd6#
      • 1...Sd7
        • 2.Qh4#
        • 2.Qg5#
      • 1...Sc8
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qf6#
        • 2.Qf7#
      • 1...Rxe7!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Be5#
      • 1...Sc7+
        • 2.Qxc7#
      • 1...Sd7
        • 2.Qxe3#
      • 1...c3
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(g);CHECK,N_GUARD::QAB(K),XS(g)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(A)
      • Vars
        • S(g);CHECK,N_GUARD::QAB(K),XS(g)
        • P(b);OGATE,P_SPINP(c)::R1(F),XP(c)
      • Refutation
        • S(e);
    • Try
      • S(G);
      • Threat
        • B(A)
      • Vars
        • S(g);CHECK,N_GUARD::QAB(K),XS(g)
        • S(e);OGATE::QAB1(K),XP(a)
      • Refutation
        • P(b);P_SPINP(c)
    • Try
      • B(L);
      • Threat
        • R1(E)
      • Vars
        • S(g);CHECK,N_GUARD::QAB(K),XS(g)
      • Refutation
        • R(h);
    • Try
      • Q(K);CHECK
      • Vars
        • S(g);CHECK,N_GUARD,P_SPINS(g)::QAB(K),XS(g)
      • Refutation
        • R(h);XQ(K)
    • Try
      • Q(K);XP(f)
      • Threat
        • DUALS(5)
      • Vars
        • S(g);CHECK,N_GUARD::QAB(K),XS(g)
      • Refutation
        • R(h);XQ(K)
  • Actual
    • S(G);
    • Threat
      • B(A)
    • Vars
      • S(g);CHECK,N_GUARD::QAB(K),XS(g)
      • S(e);OGATE::QAB1(K),XP(a)
      • P(b);OGATE,P_SPINP(c)::R1(F),XP(c)
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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).