MESON Chess Problem Database

Problem Display
PID: 278285 (K3B3/p2NB3/p3pp2/k5bR/3P4/2N5/r7/R1nnQ3 w - - 0 1)

Sterkowiec, Marcin

yacpdb, 2024

K3B3/p2NB3/p3pp2/k5bR/3P4/2N5/r7/R1nnQ3

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Rxa3#
    • 1...Ra4
      • 2.Rxa4#
    • 1...Se2
      • 2.Rxa2#
    • 1...Sb3
      • 2.Rxa2#
    • 1...Sd3
      • 2.Rxa2#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Sxd1+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kb5!
    • 1.Rxg5+?
      • 1...fxg5
        • 2.Qe5#
      • 1...f5
        • 2.Qe5#
      • 1...e5!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sc4#
      • 1...Kxb6
        • 2.Bd8#
      • 1...axb6
        • 2.Sxd1#
      • 1...Sb2
        • 2.Sca4#
      • 1...Se3
        • 2.Scd5#

This is a version of 107951

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(c);OGATE::R(A),XR(c)
    • R(c);OGATE::R1(A),XR(c)
    • S(a);N_GUARD::R(A),XR(c)
    • P(h);N_GUARD,N_SPINB(e)::QAR(B)
  • Tries
    • Try
      • S(C);CHECK,XS(b)
      • Vars
        • K(d);N_SPINB(e),P-FLIGHT::QAR1(B)
      • Refutation
        • K(d);N_SPINR(c),P-FLIGHT
    • Try
      • R(E);CHECK,XB(e)
      • Vars
        • P(h);N_GUARD,XR(E)::QAR(B)
        • P(h);N_GUARD,P_SPINP(h)::QAR(B)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);N_SPINB(e),N_SPINR(c),OGATEB,S_FLIGHT,XS(F)::B(G)
      • P(i);SBLOCK,XS(F)::QAB(B)+S(C),XS(b)
      • S(b);N_GUARD::QAB(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).