MESON Chess Problem Database

Problem Display
PID: 103616 (8/8/3p4/p1b4Q/PpkpRK2/6P1/N7/1R2N3 w - - 0 1)

Dombrovskis, Alfreds A

Keirans, Arturs

Shakhmaty, 1952

8/8/3p4/p1b4Q/PpkpRK2/6P1/N7/1R2N3

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6
      • 2.Qb5#
    • 1...Ba7
      • 2.Qb5#
    • 1...b3
      • 2.Rc1#
    • 1...d5
      • 2.Qe2#
  • Tries
    • 1.Kf3?
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3
        • 2.Rc1#
      • 1...d5!
    • 1.Kg4?
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3
        • 2.Rc1#
      • 1...d5!
    • 1.Sc2?
      • 1...Kd3
        • 2.Qe2#
      • 1...d5
        • 2.Qe2#
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3!
    • 1.Sg2?
      • 1...Kd3
        • 2.Qe2#
      • 1...d5
        • 2.Qe2#
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3!
    • 1.Rb2?
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...d5
        • 2.Qe2#
      • 1...b3!
    • 1.Re2?
      • threat
        • 2.Rc2#
      • 1...b3
        • 2.Rc1#
      • 1...d3!
    • 1.Rxd4+?
      • 1...Bxd4
        • 2.Qb5#
      • 1...Kxd4!
    • 1.Qf5?
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3
        • 2.Rc1#
      • 1...d5!
    • 1.Qg5?
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3
        • 2.Rc1#
      • 1...d5!
    • 1.g4?
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3
        • 2.Rc1#
      • 1...d5!
  • Keys
    • 1.Sd3!
      • 1...Kxd3
        • 2.Qe2#
      • 1...d5
        • 2.Se5#
      • 1...Bb6
        • 2.Qb5#
      • 1...Ba7
        • 2.Qb5#
      • 1...b3
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(e);OGATE::QAB1(H)
    • P(a);SBLOCK::R(A)
    • P(f);SBLOCK::QAB(H)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • B(e);OGATE::QAB1(H)
        • P(a);SBLOCK::R(A)
      • Refutation
        • P(f);
    • Try
      • K(G);P-FLIGHT
      • Vars
        • B(e);OGATE::QAB1(H)
        • P(a);SBLOCK::R(A)
      • Refutation
        • P(f);
    • Try
      • S(B);
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAB1(H)
        • P(f);SBLOCK::QAB(H)
        • B(e);OGATE::QAB1(H)
      • Refutation
        • P(a);
    • Try
      • S(B);
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAB1(H)
        • P(f);SBLOCK::QAB(H)
        • B(e);OGATE::QAB1(H)
      • Refutation
        • P(a);
    • Try
      • R(A);
      • Vars
        • B(e);OGATE::QAB1(H)
        • P(f);SBLOCK::QAB(H)
      • Refutation
        • P(a);
    • Try
      • R(F);N_PINP(c)
      • Threat
        • R(F)
      • Vars
        • P(a);SBLOCK::R(A)
      • Refutation
        • P(c);
    • Try
      • R(F);CHECK,XP(c)
      • Vars
        • B(e);OGATE,SBLOCK,XR(F)::QAB1(H)
      • Refutation
        • K(b);P-FLIGHT,XR(F)
    • Try
      • Q(H);
      • Vars
        • B(e);OGATE::QAB1(H)
        • P(a);SBLOCK::R(A)
      • Refutation
        • P(f);
    • Try
      • Q(H);
      • Vars
        • B(e);OGATE::QAB1(H)
        • P(a);SBLOCK::R(A)
      • Refutation
        • P(f);
    • Try
      • P(D);
      • Vars
        • B(e);OGATE::QAB1(H)
        • P(a);SBLOCK::R(A)
      • Refutation
        • P(f);
  • Actual
    • S(B);
    • Vars
      • K(b);N_SPINP(c),OGATEB,S_FLIGHT,XS(B)::QAB1(H)
      • P(f);N_GUARD,SBLOCK::S(B)
      • B(e);OGATE::QAB1(H)
      • P(a);SBLOCK::S(B)
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).