MESON Chess Problem Database

Problem Display
PID: 163917 (2R3B1/4p3/3pN1K1/3P1n2/1p5p/3k2nR/6Q1/1b1N4 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Best Problems, 2014

2R3B1/4p3/3pN1K1/3P1n2/1p5p/3k2nR/6Q1/1b1N4

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qc2#
    • 1...Bc2
      • 2.Qxc2#
    • 1...Se3
      • 2.Sb2#
    • 1...Sd4
      • 2.Sf4#
    • 1...b3
      • 2.Rc3#
  • Tries
    • 1.Rh2?
      • 1...Se2
        • 2.Qxe2#
      • 1...Sg7
        • 2.Qf3#
      • 1...Ba2
        • 2.Qc2#
      • 1...Bc2
        • 2.Qxc2#
      • 1...Sf1
        • 2.Qe2#
      • 1...Sh1
        • 2.Qe2#
      • 1...Se4
        • 2.Qf1#
        • 2.Qe2#
      • 1...Sh5
        • 2.Qe2#
      • 1...Se3
        • 2.Sb2#
      • 1...Sd4
        • 2.Sf4#
      • 1...Sh6
        • 2.Qf3#
      • 1...b3
        • 2.Rc3#
      • 1...h3!
    • 1.Rc2?
      • threat
        • 2.Qe2#
      • 1...Se3
        • 2.Sb2#
      • 1...Sd4
        • 2.Sf4#
      • 1...Bxc2!
    • 1.Rc4?
      • 1...Sg7
        • 2.Rd4#
      • 1...Ba2
        • 2.Qc2#
      • 1...Bc2
        • 2.Qxc2#
      • 1...Se3
        • 2.Sb2#
        • 2.Rd4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sh6
        • 2.Rd4#
      • 1...b3
        • 2.Rc3#
      • 1...Kxc4!
    • 1.Qf3+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Kd2!
  • Keys
    • 1.Bh7!
      • 1...Sg7
        • 2.Kxg7#
      • 1...Ba2
        • 2.Qc2#
      • 1...Bc2
        • 2.Qxc2#
      • 1...Se3
        • 2.Sb2#
      • 1...Sd4
        • 2.Sf4#
      • 1...Sh6
        • 2.Kxh6#
      • 1...b3
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • S(f);N_SPINS(c),SBLOCK::S(A)
    • S(f);SBLOCK::S(E)
    • P(d);N_GUARD::R1(G)
  • Tries
    • Try
      • R(C);N_PINS(c)
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(f);N_GUARD::QAR2(B)
        • B(a);N_GUARD::QAB1(B)
        • B(a);N_GUARD::QAB1(B),XB(a)
        • S(c);N_GUARD::QAB1(B)
        • S(f);SBLOCK::S(A)
        • S(f);SBLOCK::S(E)
        • P(d);N_GUARD::R1(G)
      • Refutation
        • P(e);
    • Try
      • R(G);
      • Threat
        • QAB1(B)
      • Vars
        • S(f);N_SPINS(c),SBLOCK::S(A)
        • S(f);SBLOCK::S(E)
      • Refutation
        • B(a);XR(G)
    • Try
      • R(G);
      • Vars
        • S(f);N_GUARD::R1(G)
        • B(a);N_GUARD::QAB1(B)
        • B(a);N_GUARD::QAB1(B),XB(a)
        • S(f);N_GUARD::R1(G),XS(f)
        • P(d);N_GUARD::R1(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT,XR(G)
    • Try
      • Q(B);CHECK,N_PINS(c)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR1(B),XS(f)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(H);
    • Vars
      • S(f);::B(H)+K(F),XS(f)
      • B(a);N_GUARD::QAB1(B)
      • B(a);N_GUARD::QAB1(B),XB(a)
      • S(f);N_SPINS(c),SBLOCK::S(A)
      • S(f);SBLOCK::S(E)
      • P(d);N_GUARD::R1(G)
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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).