MESON Chess Problem Database

Problem Display
PID: 176133 (2R5/3N3K/Q1rN3p/1r1kPB2/1p1n3R/2p5/3nP3/5b2 w - - 0 1)

Rauch, Fritz

Schach-Echo, 1938

2R5/3N3K/Q1rN3p/1r1kPB2/1p1n3R/2p5/3nP3/5b2

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Qxd6#
    • 1...Sb1
      • 2.e4#
    • 1...S2b3
      • 2.e4#
    • 1...S2f3
      • 2.e4#
    • 1...Sc4
      • 2.e4#
    • 1...Sc2
      • 2.Qxc6#
    • 1...Sxe2
      • 2.Qxc6#
    • 1...S4b3
      • 2.Qxc6#
    • 1...S4f3
      • 2.Qxc6#
    • 1...Se6
      • 2.Qxc6#
  • Tries
    • 1.Be6+?
      • 1...Sxe6
        • 2.Qxc6#
      • 1...Kxe6!
    • 1.Qxb5+?
      • 1...Rc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...Sxb5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Be6#
      • 1...Rxc4
        • 2.Qd6#
      • 1...Sxc4
        • 2.e4#
      • 1...Sxf5
        • 2.Qxc6#
      • 1...Sc2
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(h);OGATE,XS(F)::QAR1(E),XR(h)
    • S(b);N_GUARD::P(A)
    • S(e);N_GUARD::QAB1(E),XR(h)
    • S(e);N_GUARD,XP(A)::QAB1(E),XR(h)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • S(e);SBLOCK,XB(D)::QAB1(E),XR(h)
      • Refutation
        • K(g);S_FLIGHT,XB(D)
    • Try
      • Q(E);CHECK,XR(f)
      • Refutation
        • S(e);XQ(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(g);P_SPINR(f),P_SPINS(e),S_FLIGHT,XS(F)::B(D)
      • R(h);OGATE,XS(F)::QAR1(E)
      • S(b);N_GUARD,SBLOCK,XS(F)::P(A)
      • S(e);N_GUARD,XB(D)::QAB1(E),XR(h)
      • S(e);N_GUARD::QAB1(E),XR(h)
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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).