MESON Chess Problem Database

Problem Display
PID: 91079 (4N1b1/2p1n1p1/Q7/2RrkP2/3n1R2/2r2pP1/1NP5/B2K2b1 w - - 0 1)

Nanning, Frederik Willem

Die Schwalbe, 1949

4N1b1/2p1n1p1/Q7/2RrkP2/3n1R2/2r2pP1/1NP5/B2K2b1

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Sd3#
    • 1...Ra3
      • 2.Sc4#
    • 1...Rb3
      • 2.Sc4#
    • 1...Rd3+
      • 2.Sxd3#
    • 1...Re3
      • 2.Sc4#
    • 1...Rc4
      • 2.Sd3#
      • 2.Sxc4#
    • 1...Rcxc5
      • 2.Sd3#
    • 1...Sxc2+
      • 2.Sd3#
    • 1...Se2+
      • 2.Sd3#
    • 1...Sb3+
      • 2.Sd3#
    • 1...Sb5+
      • 2.Sd3#
    • 1...Sdxf5+
      • 2.Sd3#
    • 1...Sdc6+
      • 2.Sd3#
    • 1...Se6+
      • 2.Sd3#
    • 1...g5
      • 2.Qf6#
    • 1...g6
      • 2.Qf6#
  • Tries
    • 1.Qe6+?
      • 1...Sxe6+
        • 2.Sd3#
      • 1...Bxe6!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qe4#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Sxc2
        • 2.Sc4#
      • 1...Sdxf5
        • 2.Re4#
      • 1...Se2
        • 2.Sc4#
      • 1...Sb3
        • 2.Sc4#
      • 1...Sb5
        • 2.Sc4#
      • 1...Sdc6
        • 2.Sc4#
      • 1...Se6
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD,XP(D)::S(C)
    • R(b);N_GUARD::S(C)
    • R(b);CHECK,N_GUARD::S(C),XR(b)
    • R(b);N_GUARD,N_SPINR(e),XR(G)::S(C)
    • S(d);CHECK,S_CUTR(b),XP(D)::S(C)
    • S(d);CHECK,S_CUTR(b)::S(C)
    • S(d);CHECK,S_CUTR(b),XP(H)::S(C)
    • P(i);N_GUARD::QAB1(I)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • S(d);CHECK,XQ(I)::S(C)
      • Refutation
        • B(j);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • R(b);CHECK,XQ(I)::S(C),XR(b)
      • S(d);P_PINQ(I),S_CUTR(b),XP(D)::S(C)
      • S(d);P_PINQ(I),SBLOCK,XP(H)::R1(F)
      • S(d);P_PINQ(I),S_CUTR(b)::S(C)
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).