MESON Chess Problem Database

Problem Display
PID: 269160 (1N6/4p3/1b2N2K/6R1/4k3/r2r3R/8/1Q6 w - - 0 1)

Chernikh, Vassily

64 Shakhmatnoe obozrenie, 2023

1N6/4p3/1b2N2K/6R1/4k3/r2r3R/8/1Q6

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxd3#
    • 1...Ra2
      • 2.Qxd3#
    • 1...Ra4
      • 2.Qxd3#
    • 1...Ra5
      • 2.Qxd3#
    • 1...Ra6
      • 2.Qxd3#
    • 1...Ra7
      • 2.Qxd3#
    • 1...Ra8
      • 2.Qxd3#
    • 1...Be3
      • 2.Qh1#
    • 1...Bd4
      • 2.Qb7#
  • Tries
    • 1.Re3+?
      • 1...Bxe3
        • 2.Qh1#
      • 1...Kxe3!
    • 1.Qe1+?
      • 1...Be3
        • 2.Qh1#
      • 1...Re3!
    • 1.Qb4+?
      • 1...Bd4
        • 2.Qb7#
      • 1...Rd4!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Re5#
      • 1...Ra5
        • 2.Qxd3#
      • 1...Be3
        • 2.Qh1#
      • 1...Bd4
        • 2.Qb7#
      • 1...Bc7
        • 2.Sdc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::QAB1(A),XR(b)
    • B(d);P_PINR(C)::QAB(A)
    • B(d);OGATE::QAB(A)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • B(d);P_PINR(C),SBLOCK,XR(B)::QAB(A)
      • Refutation
        • K(c);N_SPINR(b),P-FLIGHT,XR(B)
    • Try
      • Q(A);CHECK,N_PINR(b)
      • Vars
        • B(d);P_PINR(C),P_SPINB(d),S_CUTR(b)::QAB(A)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(A);CHECK,N_PINR(b)
      • Vars
        • B(d);OGATE,P_SPINB(d)::QAB(A)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • S(F);
    • Threat
      • R1(C)
    • Vars
      • R(a);N_GUARD::QAB1(A),XR(b)
      • B(d);P_PINR(C)::QAB(A)
      • B(d);OGATE::QAB(A)
      • B(d);N_GUARD::S(F)
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).