MESON Chess Problem Database

Problem Display
PID: 245423 (r4b2/1R2p3/2N1k1Kn/8/2PR1pp1/2Q5/8/1n4r1 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

64 Shakhmatnoe obozrenie, 1990

r4b2/1R2p3/2N1k1Kn/8/2PR1pp1/2Q5/8/1n4r1

#2

6 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxe1#
    • 1...Bg7
      • 2.Rxe7#
    • 1...f3
      • 2.Qe3#
  • Tries
    • 1.Sd8+?
      • 1...Ke5
        • 2.Rb5#
      • 1...Rxd8!
    • 1.Rd6+?
      • 1...exd6
        • 2.Qf6#
      • 1...Kxd6!
    • 1.Qa5?
      • threat
        • 2.Qd5#
        • 2.Qe5#
      • 1...Sf7
        • 2.Qd5#
        • 2.Qf5#
      • 1...Re1
        • 2.Qxe1#
        • 2.Qd5#
      • 1...Rd8
        • 2.Sxd8#
        • 2.Qe5#
      • 1...Bg7
        • 2.Rxe7#
        • 2.Qd5#
      • 1...Sc3
        • 2.Qe5#
      • 1...Rxa5!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Sd4#
        • 2.Qe5#
      • 1...Sxc3
        • 2.Sd4#
      • 1...Sf7
        • 2.Sd4#
      • 1...Rd1
        • 2.Qe5#
      • 1...Re1
        • 2.Sd4#
        • 2.Qxe1#
      • 1...Bg7
        • 2.Rxe7#
      • 1...Sf5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::QAR(A),XR(b)
    • B(i);N_GUARD::R1(F),XP(g)
    • P(c);N_GUARD::QAR(A)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT::R(F)
      • Refutation
        • R(h);XS(D)
    • Try
      • R(C);CHECK
      • Vars
        • P(g);SBLOCK,XR(C)::QAR1(A)
      • Refutation
        • K(e);P-FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
      • Refutation
        • R(h);XQ(A)
  • Actual
    • R(C);
    • Threat
      • DUALS(2)
    • Vars
      • S(a);XQ(A)::S(D)
      • S(f);::S(D)
      • R(b);::QAR1(A)
      • B(i);N_GUARD::R1(F),XP(g)
      • S(f);::QAR1(A)
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).