MESON Chess Problem Database

Problem Display
PID: 176299 (4Q1b1/p4p2/5P2/r2PpNr1/3RKB2/2b5/1PP1kp1N/5R2 w - - 0 1)

Fokin, Yuri Georgievich

Schach-Echo, 1976

4Q1b1/p4p2/5P2/r2PpNr1/3RKB2/2b5/1PP1kp1N/5R2

#2

11 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb5#
    • 1...Ra2
      • 2.Qb5#
    • 1...Ra3
      • 2.Qb5#
    • 1...Rb5
      • 2.Qxb5#
    • 1...Ra6
      • 2.Qb5#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rh5
      • 2.Sg3#
    • 1...Bxb2
      • 2.Rd2#
    • 1...Bd2
      • 2.Rxd2#
    • 1...exf4
      • 2.Kxf4#
  • Keys
    • 1.Kxe5!
      • threat
        • 2.Kd6#
      • 1...Rxd5+
        • 2.Kxd5#
      • 1...Rxf5+
        • 2.Kxf5#
      • 1...Bxd4+
        • 2.Kxd4#
      • 1...Ra6
        • 2.Qb5#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Bd2
        • 2.Rxd2#
      • 1...Bb4
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(d);N_GUARD::QAB(K)
    • R(d);N_GUARD::QAB(K),XR(d)
    • R(f);N_GUARD::S(I),XR(f)
    • R(f);N_GUARD::S(I)
    • B(c);N_GUARD,XP(B)::R1(E)
    • B(c);N_GUARD::R1(E),XB(c)
    • P(e);XB(G)::QAR(K)+K(F),XP(e)
  • Actual
    • K(F);P-FLIGHT,P_SPINP(H),P_SPINR(E),P_SPINS(I),XP(e)
    • Threat
      • QAR(K)+K(F)
    • Vars
      • R(d);CHECK,XP(H)::QAR(K)+K(F),XR(d)
      • R(f);CHECK,XS(I)::QAR(K)+K(F),XR(f)
      • B(c);CHECK,XR(E)::QAR(K)+K(F),XB(c)
      • R(d);N_GUARD,N_PINP(H)::QAB(K)
      • R(f);N_PINS(I)::S(I),XR(f)
      • B(c);N_PINR(E)::R1(E),XB(c)
      • B(c);N_PINR(E)::R(E)
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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).