MESON Chess Problem Database

Problem Display
PID: 157120 (R7/5kpr/4R3/1p3P2/1P4rp/1BB5/K1Q5/5b2 w - - 0 1)

Kuligin, Nikolai Volodimirovich

Best Problems, 2007

R7/5kpr/4R3/1p3P2/1P4rp/1BB5/K1Q5/5b2

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Re2#
    • 1...Rg2
      • 2.Re2#
    • 1...Rg3
      • 2.Re2#
    • 1...Rg5
      • 2.Re2#
    • 1...Rg6
      • 2.fxg6#
    • 1...Bg2
      • 2.Re4#
    • 1...Bh3
      • 2.Re4#
  • Tries
    • 1.Rea6+?
      • 1...Rc4
        • 2.R6a7#
      • 1...Bc4
        • 2.R6a7#
      • 1...Ke7!
    • 1.Rb6+?
      • 1...Rc4
        • 2.Rb7#
      • 1...Bc4
        • 2.Rb7#
      • 1...Ke7!
    • 1.Rc6+?
      • 1...Rc4
        • 2.Rc7#
      • 1...Bc4
        • 2.Rc7#
      • 1...Ke7!
    • 1.Rd6+?
      • 1...Rc4
        • 2.Rd7#
      • 1...Bc4
        • 2.Rd7#
      • 1...Ke7!
    • 1.Ra7+?
      • 1...Kg8
        • 2.Re8#
      • 1...Kf8!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qb7#
      • 1...Rxg2+
        • 2.Re2#
      • 1...Bxg2
        • 2.Re4#
      • 1...Rc4
        • 2.Qg6#
      • 1...Rd4
        • 2.Qg6#
      • 1...Re4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::B(C)+R(G)
    • R(b);N_GUARD,P_PINQ(B)::B(C)+R(G)
    • R(b);OGATE::P(F),XR(b)
    • B(a);N_GUARD::B(C)+R(G)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(G)
        • B(a);P_PINB(C),P_SPINB(a)::R(G)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(G)
        • B(a);P_PINB(C),P_SPINB(a)::R(G)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(G)
        • B(a);P_PINB(C),P_SPINB(a)::R(G)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(G)
        • B(a);P_PINB(C),P_SPINB(a)::R(G)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(H);CHECK
      • Vars
        • K(e);S_FLIGHT::B(C)+R(G),DCHECK
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • R(b);CHECK,N_GUARD,XQ(B)::B(C)+R(G)
      • B(a);N_GUARD,XQ(B)::B(C)+R(G)
      • R(b);OGATE::QAB1(B)
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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).