MESON Chess Problem Database

Problem Display
PID: 231336 (K1n2Q2/Bp3p2/1r1n2b1/8/2p5/7p/R6P/1R3Nkr w - - 0 1)

Krebel, L

Krebel, V

64 Shakhmatnoe obozrenie, 1927

K1n2Q2/Bp3p2/1r1n2b1/8/2p5/7p/R6P/1R3Nkr

#2

7 + 10

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Sg3#
    • 1...Sf5
      • 2.Sg3#
    • 1...Se8
      • 2.Qc5#
    • 1...Se7
      • 2.Bxb6#
    • 1...f5
      • 2.Sg3#
  • Tries
    • 1.Qxd6?
      • threat
        • 2.Qg3#
        • 2.Qc5#
        • 2.Qd4#
      • 1...Rxh2
        • 2.Qxh2#
      • 1...Sxd6
        • 2.Bxb6#
      • 1...Bc2
        • 2.Qg3#
      • 1...Be4
        • 2.Qc5#
        • 2.Qd4#
      • 1...Bxb1!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qd4#
      • 1...Rxh2
        • 2.Sxh2#
      • 1...Se4
        • 2.Sg3#
      • 1...Sb5
        • 2.Se3#
      • 1...Sf5
        • 2.Sg3#
      • 1...f6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(f);S_CUTB(g)::R(A)+S(B)
    • S(f);OGATE::QAB(G)
    • S(j);N_GUARD::B(E),XR(e)
    • P(i);S_CUTB(g)::R(A)+S(B)
  • Tries
    • Try
      • Q(G);XS(f)
      • Threat
        • DUALS(3)
      • Vars
        • R(b);OGATE,XP(D)::QAB1(G),XR(b)
        • S(j);N_GUARD,XQ(G)::B(E),XR(e)
        • B(g);::QAR2(G)
      • Refutation
        • B(g);XR(A)
  • Actual
    • Q(G);P_PINB(g)
    • Threat
      • QAB(G)
    • Vars
      • R(b);XP(D)::R(A)+S(B),XR(b)
      • S(f);::R(A)+S(B)
      • P(i);N_GUARD::QAR(G),XB(g)
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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).