MESON Chess Problem Database

Problem Display
PID: 275647 (b1Q1NB2/b4B1p/r4p1r/ppPP3p/2k5/1n1R4/2N1P3/7K w - - 0 1)

Paslack, Rainer

Die Schwalbe, 2023

b1Q1NB2/b4B1p/r4p1r/ppPP3p/2k5/1n1R4/2N1P3/7K

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.dxc6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Bb6
      • 2.Sd6#
    • 1...Bxd5+
      • 2.Bxd5#
    • 1...Bc6
      • 2.dxc6#
    • 1...b4
      • 2.Qxa6#
  • Tries
    • 1.Qg4+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...hxg4+!
    • 1.Qc6?
      • threat
        • 2.Sd6#
        • 2.d6#
      • 1...Rxc6
        • 2.dxc6#
      • 1...Bxc6
        • 2.dxc6#
      • 1...Bb8
        • 2.d6#
      • 1...Sd4
        • 2.Sd6#
      • 1...f5!
  • Keys
    • 1.c6!
      • threat
        • 2.Sa3#
      • 1...b4
        • 2.Qxa6#
      • 1...Bc5
        • 2.d6#
      • 1...Sc5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(f);N_PINP(F)::B(G)+P(F),XR(f)
    • R(f);N_GUARD::S(I),XR(f)
    • B(i);S_CUTR(f)::S(I)
    • B(k);CHECK,OGATE,P_SPINB(k),XP(F)::B(G),XB(k)
    • B(k);::B(G)+P(F),XB(k)
    • P(d);OGATEB::QAB(H),XR(f)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(H),XS(a)
      • Refutation
        • P(e);CHECK,XQ(H)
    • Try
      • Q(H);N_SPINP(F)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);OGATE,XQ(H)::B(G)+P(F),XR(f)
        • B(k);OGATE,P_PINP(F),XQ(H)::B(G)+P(F),XB(k)
        • B(i);::B(G)+P(F)
        • S(a);::S(I)
      • Refutation
        • P(g);
  • Actual
    • P(E);N_SPINP(F)
    • Threat
      • S(B)
    • Vars
      • P(d);OGATEB::QAB(H),XR(f)
      • B(i);SBLOCK::B(G)+P(F)
      • S(a);SBLOCK::S(I)
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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).