MESON Chess Problem Database

Problem Display
PID: 157662 (n4B1n/1R3P2/5k2/2N3pP/1p2K1B1/2r2Np1/1Q3P2/5R2 w - - 0 1)

Paslack, Rainer

Die Schwalbe, 1968

n4B1n/1R3P2/5k2/2N3pP/1p2K1B1/2r2Np1/1Q3P2/5R2

#2

11 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf7
      • 2.Sd7#
    • 1...b3
      • 2.Qxc3#
  • Tries
    • 1.Kd4?
      • threat
        • 2.Se4#
      • 1...Rd3+
        • 2.Kxd3#
      • 1...Rc4+
        • 2.Kxc4#
      • 1...Rxc5
        • 2.Kxc5#
      • 1...Re3
        • 2.Kxe3#
      • 1...Sc7!
    • 1.Rd1?
      • threat
        • 2.Rd6#
      • 1...Sxf7
        • 2.Sd7#
      • 1...Sc7!
  • Keys
    • 1.Se5!
      • threat
        • 2.Scd7#
      • 1...Re3+
        • 2.fxe3#
      • 1...Rc4+
        • 2.Sxc4#
      • 1...Rxc5
        • 2.fxg3#
      • 1...Rd3
        • 2.Sexd3#
      • 1...Sb6
        • 2.Rxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(g);SBLOCK,XP(J)::S(G)
    • P(c);N_GUARD::QAB(B),XR(a)
  • Tries
    • Try
      • K(E);N_PINR(a),P-FLIGHT
      • Threat
        • S(G)
      • Vars
        • R(a);CHECK::QAB(B)+K(E),XR(a)
        • R(a);XS(G)::QAB(B)+K(E),XR(a)
        • R(a);::QAB(B)+K(E),XR(a)
      • Refutation
        • S(f);
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • S(g);SBLOCK,XP(J)::S(G)
      • Refutation
        • S(f);
  • Actual
    • S(D);N_PINR(a)
    • Threat
      • S(G)
    • Vars
      • R(a);CHECK,OGATE::R(A)+P(C),XR(a)
      • R(a);CHECK::QAB(B)+S(D),XR(a)
      • R(a);N_GUARD,XS(G)::R(A)+P(C),XP(b)
      • R(a);::QAB(B)+S(D),XR(a)
      • S(f);N_GUARD::R(I),XS(f)
HTML5 logo

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).