MESON Chess Problem Database

Problem Display
PID: 269284 (2BR3B/2Pr4/1Rqpr3/3k2N1/b2P4/QPP5/8/2KN4 w - - 0 1)

Vasilenko, Anatoly Grigorovich

Phenix, 2022

2BR3B/2Pr4/1Rqpr3/3k2N1/b2P4/QPP5/8/2KN4

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.c4#
    • 1...Qa8
      • 2.c4#
    • 1...Qxc3+
      • 2.Sxc3#
    • 1...Re3
      • 2.Sxe3#
    • 1...Rf6
      • 2.Se3#
    • 1...Rg6
      • 2.Se3#
    • 1...Rh6
      • 2.Se3#
    • 1...Rxc7
      • 2.Bxe6#
    • 1...Rf7
      • 2.Bxe6#
    • 1...Rg7
      • 2.Bxe6#
    • 1...Rh7
      • 2.Bxe6#
    • 1...Rxd8
      • 2.Bxe6#
  • Tries
    • 1.Bb7?
      • threat
        • 2.c4#
      • 1...Bxb3
        • 2.Qxb3#
      • 1...Rf6
        • 2.Se3#
      • 1...Rg7
        • 2.Qc5#
      • 1...Bb5
        • 2.Rxb5#
      • 1...Re5!
  • Keys
    • 1.Qxd6+!
      • 1...Kxd6
        • 2.Rxd7#
      • 1...Qxd6
        • 2.c4#
      • 1...Rexd6
        • 2.Se3#
      • 1...Rdxd6
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(c);N_GUARD,N_PINP(E)::P(E)
    • Q(c);CHECK,XP(E)::S(B),XQ(c)
    • R(e);N_GUARD::S(B),XR(e)
    • R(e);N_GUARD::S(B)
    • R(f);OGATE,P_SPINP(d),XP(I)::B(J),XR(e)
    • R(f);OGATE,P_SPINP(d)::B(J),XR(e)
    • R(f);OGATE,XR(K)::B(J),XR(e)
  • Tries
    • Try
      • B(J);P_PINQ(c)
      • Threat
        • P(E)
      • Vars
        • B(a);OGATE,XP(D)::QAB(C),XB(a)
        • R(e);N_GUARD::S(B)
        • R(f);P_SPINP(d)::QAR1(C)
        • B(a);N_GUARD::R(H),XB(a)
      • Refutation
        • R(e);
  • Actual
    • Q(C);CHECK,XP(d)
    • Vars
      • K(b);P-FLIGHT,P_SPINQ(c),P_SPINR(f),S_CUTR(e),XQ(C)::R1(K),XR(f)
      • Q(c);N_PINP(E),XQ(C)::P(E)
      • R(e);SBLOCK,XQ(C)::S(B)
      • R(f);OGATE,P_SPINR(f),XQ(C)::B(J),XR(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).