MESON Chess Problem Database

Problem Display
PID: 165241 (8/8/8/Q7/1K6/3p4/R3b1R1/4k3 w - - 0 1)

Zakhodyakin, Gleb Nikolaevich

Vecherni Praha, 1964

8/8/8/Q7/1K6/3p4/R3b1R1/4k3

#2

4 + 3

15148 Sadier Collection 2017
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Rg1#
    • 1...Bf1
      • 2.Ra1#
    • 1...Bf3
      • 2.Rg1#
    • 1...Bg4
      • 2.Rg1#
    • 1...Bh5
      • 2.Rg1#
  • Tries
    • 1.Raxe2+?
      • 1...Kd1
        • 2.Qa1#
      • 1...Kf1
        • 2.Qa1#
        • 2.Qf5#
      • 1...dxe2!
    • 1.Qe5?
      • 1...Kd1
        • 2.Qa1#
      • 1...d2
        • 2.Qxe2#
      • 1...Kf1!
  • Keys
    • 1.Qh5!
      • 1...Kd1
        • 2.Rg1#
      • 1...Kf1
        • 2.Qh1#
      • 1...Bxh5
        • 2.Rg1#
      • 1...d2
        • 2.Qxe2#
      • 1...Bd1
        • 2.Rg1#
        • 2.Qh1#
      • 1...Bf1
        • 2.Ra1#
      • 1...Bf3
        • 2.Rg1#
        • 2.Qh1#
      • 1...Bg4
        • 2.Rg1#
        • 2.Qh1#

Anticipated by 9460(0000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD,SBLOCK::R(B)
    • B(b);N_GUARD,SBLOCK::R(A)
    • B(b);N_GUARD::R(B)
  • Tries
    • Try
      • R(A);CHECK,XB(b)
      • Vars
        • K(a);P-FLIGHT::QAR(D)
      • Refutation
        • P(c);XR(A)
    • Try
      • Q(D);P_PINB(b)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR(D)
        • P(c);N_GUARD::QAR1(D),XB(b)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT,P_SPINB(b)::R(B)
      • K(a);P-FLIGHT::QAR2(D)
      • B(b);N_GUARD,XQ(D)::R(B)
      • P(c);N_GUARD::QAR1(D),XB(b)
      • B(b);N_GUARD,SBLOCK::R(A)
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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).