MESON Chess Problem Database

Problem Display
PID: 89934 (8/6p1/p1P3Pp/R4P1Q/2RpB3/4kN1p/4p2P/1K2B1n1 w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 1998

8/6p1/p1P3Pp/R4P1Q/2RpB3/4kN1p/4p2P/1K2B1n1

#2

11 + 8

6490 yacpdb 2009
23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf3
      • 2.Qxf3#
  • Tries
    • 1.Sxg1?
      • threat
        • 2.Qf3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kf4!
    • 1.Bd2+?
      • 1...Kxe4
        • 2.Rxd4#
      • 1...Kf2!
    • 1.Bf2+?
      • 1...Kxe4
        • 2.Rxd4#
      • 1...Kf4
        • 2.Qh4#
      • 1...Kxf2!
    • 1.Bc2?
      • 1...Kf4
        • 2.Bd2#
      • 1...d3
        • 2.Re5#
      • 1...Sxf3!
    • 1.Rxd4?
      • 1...Kf4
        • 2.Bd2#
      • 1...Sxf3!
    • 1.Ra3+?
      • 1...Kxe4
        • 2.Rxd4#
      • 1...Kf4
        • 2.Qh4#
      • 1...d3!
    • 1.Re5?
      • 1...Kf4
        • 2.Bd2#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...d3
        • 2.Bd5#
      • 1...a5!
  • Keys
    • 1.Bd5!
      • 1...Kd3
        • 2.Ra3#
      • 1...Kf4
        • 2.Bd2#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...d3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,XS(D)::QAR1(I),XS(a)
  • Tries
    • Try
      • S(D);XS(a)
      • Threat
        • QAR1(I)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e),XB(F)::QAB1(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e),XB(F)::R1(E),XP(e)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e),XB(F)::R1(E),XP(e)
        • K(c);S_FLIGHT::QAR2(I)
      • Refutation
        • K(c);S_FLIGHT,XB(B)
    • Try
      • B(F);
      • Vars
        • K(c);P_SPINP(e),S_FLIGHT::B(B)
        • P(e);::R(G)
      • Refutation
        • S(a);XS(D)
    • Try
      • R(E);XP(e)
      • Vars
        • K(c);S_FLIGHT::B(B)
      • Refutation
        • S(a);XS(D)
    • Try
      • R(G);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e),XB(F)::R1(E),XP(e)
        • K(c);S_FLIGHT::QAR2(I)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • R(G);
      • Vars
        • K(c);S_FLIGHT::B(B)
        • S(a);OGATE,XS(D)::QAR1(I),XS(a)
        • P(e);SBLOCK::R(G)+B(F)
      • Refutation
        • P(f);
  • Actual
    • B(F);
    • Vars
      • K(c);P-FLIGHT::R(G)
      • K(c);P_SPINP(e),S_FLIGHT::B(B)
      • S(a);OGATE,XS(D)::QAR1(I),XS(a)
      • P(e);OGATE,SBLOCK::R1(E)
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).