Problem Display
PID: 172536 (1k6/1P1r4/K1P5/8/8/4Q3/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2003

1k6/1P1r4/K1P5/8/8/4Q3/8/8

#2

4 + 2


6490 yacpdb 2018

SOLUTION


  • SOUND
  • Sets
    • 1...Rc7
      • 2.Qa7#
  • Tries
    • 1.Qf4+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rc7!
    • 1.Qg3+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rc7!
    • 1.Qe5+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rc7!
    • 1.Qe8+?
      • 1...Rd8
        • 2.Qxd8#
      • 1...Kc7!
    • 1.c7+?
      • 1...Rxc7
        • 2.Qa7#
      • 1...Kxc7!
  • Keys
    • 1.Qb6!
      • 1...Rxb7
        • 2.Qd8#
        • 2.Qxb7#
      • 1...Rd1
        • 2.c7#
      • 1...Rd2
        • 2.c7#
      • 1...Rd3
        • 2.c7#
      • 1...Rd4
        • 2.c7#
      • 1...Rd5
        • 2.c7#
      • 1...Rd6
        • 2.c7#
      • 1...Rc7
        • 2.Qa7#
      • 1...Re7
        • 2.Qd8#
      • 1...Rf7
        • 2.Qd8#
      • 1...Rg7
        • 2.Qd8#
      • 1...Rh7
        • 2.Qd8#
      • 1...Rd8
        • 2.Qxd8#
        • 2.c7#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_PINP(C),P_SPINR(a)::QAB(A),XR(a)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_PINP(C),P_SPINR(a)::QAB(A),XR(a)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_PINP(C),P_SPINR(a)::QAB(A),XR(a)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(A),XR(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • R(a);SBLOCK,XP(C)::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(C)
  • Actual
    • Q(A);
    • Vars
      • R(a);N_GUARD::P(C)
      • R(a);SBLOCK::QAB1(A)
      • R(a);N_GUARD::QAR2(A)


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).