MESON Chess Problem Database

Problem Display
PID: 21611 (N4BB1/2N4p/3p4/1Pk2KQ1/1r2n3/3RP1p1/1rq5/2R5 w - - 0 1)

Kraemer, Adolf Herrmann Rudolf Ferdinand

Deutsche Tageszeitung, 1920

N4BB1/2N4p/3p4/1Pk2KQ1/1r2n3/3RP1p1/1rq5/2R5

#2

10 + 8

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Rd5#
    • 1...Sd2
      • 2.Kf6#
      • 2.Bxd6#
    • 1...Sf2
      • 2.Kf6#
      • 2.Bxd6#
    • 1...Sc3
      • 2.Bxd6#
    • 1...Sxg5
      • 2.Bxd6#
    • 1...Sf6
      • 2.Kxf6#
      • 2.Bxd6#
  • Tries
    • 1.Ke6+?
      • 1...Kc4
        • 2.Qd5#
      • 1...Sxg5+!
    • 1.Rxc2+?
      • 1...Rc4
        • 2.Rxc4#
      • 1...Sc3
        • 2.Kf6#
        • 2.Bxd6#
      • 1...Rxc2!
  • Keys
    • 1.Rxd6!
      • threat
        • 2.Rc6#
      • 1...Sd2+
        • 2.Kf6#
        • 2.Rd3#
      • 1...Sf2+
        • 2.Kf6#
        • 2.Rd3#
      • 1...Sc3+
        • 2.Rd3#
      • 1...Sxg5+
        • 2.Rd3#
      • 1...Sxd6+
        • 2.Kf6#
      • 1...Sf6+
        • 2.Kxf6#
        • 2.Rd3#
      • 1...Rxb5
        • 2.Sa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);::R1(B)
    • S(e);N_GUARD,N_SPINQ(b),P_PINR(B)::B(I),XP(g)
    • S(e);N_GUARD,P_PINR(B),XQ(F)::B(I),XP(g)
  • Tries
    • Try
      • K(E);CHECK,S_FLIGHT
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::QAB1(F)
      • Refutation
        • S(e);CHECK,XQ(F)
    • Try
      • R(A);CHECK,XQ(b)
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::R1(A),XR(d)
      • Refutation
        • R(a);XR(A)
  • Actual
    • R(B);XP(g)
    • Threat
      • B(I)+R(B),DCHECK
    • Vars
      • S(e);CHECK,N_GUARD,N_SPINQ(b)::B(I)+R(B)
      • S(e);CHECK,N_GUARD,XQ(F)::B(I)+R(B)
      • S(e);CHECK,P_SPINS(e),XR(B)::QAR(F)+K(E)
      • R(d);SBLOCK,XP(D)::S(G)
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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).