MESON Chess Problem Database

Problem Display
PID: 229891 (5Q2/6K1/B1pRp3/P2n4/3kP3/5P2/3P4/3R4 w - - 0 1)

Erokhin, Vladimir Alekseevich

Zadachi i Etyudi, 2000

5Q2/6K1/B1pRp3/P2n4/3kP3/5P2/3P4/3R4

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rxd5#
    • 1...Ke5
      • 2.d4#
  • Tries
    • 1.Rxc6?
      • 1...Ke5
        • 2.d4#
      • 1...Sc3
        • 2.Qc5#
      • 1...Se3
        • 2.Qc5#
      • 1...Sb4
        • 2.Qc5#
      • 1...Sf4
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#
      • 1...Sc7
        • 2.Qc5#
      • 1...e5
        • 2.Qc5#
      • 1...Se7!
    • 1.Rd7?
      • 1...Ke5
        • 2.d4#
      • 1...e5
        • 2.Qb4#
      • 1...c5!
    • 1.Rd8?
      • 1...Ke5
        • 2.d4#
      • 1...e5
        • 2.Qb4#
      • 1...c5!
    • 1.Qf4?
      • 1...c5
        • 2.exd5#
        • 2.e5#
      • 1...e5
        • 2.Qe3#
      • 1...Kc5!
    • 1.e5?
      • 1...Kxe5
        • 2.d4#
      • 1...c5
        • 2.Qf4#
      • 1...Kc5!
  • Keys
    • 1.Qb8!
      • 1...Kc5
        • 2.d4#
      • 1...Ke5
        • 2.Rxd5#
      • 1...c5
        • 2.Qb2#
      • 1...e5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINS(b),S_FLIGHT::QAB(I)+R(G),DCHECK,XS(b)
    • K(a);N_SPINS(b),OGATE,S_FLIGHT::P(B)
  • Tries
    • Try
      • R(G);N_PINS(b),XP(c)
      • Vars
        • K(a);OGATE,S_FLIGHT::P(B)
        • S(b);::QAB1(I)
        • P(d);SBLOCK::QAB1(I)
      • Refutation
        • S(b);
    • Try
      • R(G);
      • Vars
        • K(a);N_SPINS(b),OGATE,S_FLIGHT::P(B)
        • P(d);SBLOCK::QAR2(I)
      • Refutation
        • P(c);
    • Try
      • R(G);
      • Vars
        • K(a);N_SPINS(b),OGATE,S_FLIGHT::P(B)
        • P(d);SBLOCK::QAR2(I)
      • Refutation
        • P(c);
    • Try
      • Q(I);
      • Vars
        • P(d);SBLOCK::QAB1(I)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • P(D);
      • Vars
        • K(a);N_SPINS(b),OGATE,S_FLIGHT,XP(D)::P(B)
        • P(c);SBLOCK::QAR2(I)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
  • Actual
    • Q(I);
    • Vars
      • K(a);N_SPINS(b),OGATE,S_FLIGHT::P(B)
      • K(a);N_SPINS(b),S_FLIGHT::QAB(I)+R(G),DCHECK,XS(b)
      • P(c);SBLOCK::QAB(I)
      • P(d);SBLOCK::QAR2(I)
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).