MESON Chess Problem Database

Problem Display
PID: 173091 (7n/K1BR1rp1/pQ6/r3p1p1/3N1k2/2Nn1Pp1/3P2q1/5Rb1 w - - 0 1)

Barulin, Mikhail Mikhailovich

64 Shakhmatnoe obozrenie, 1936

7n/K1BR1rp1/pQ6/r3p1p1/3N1k2/2Nn1Pp1/3P2q1/5Rb1

#2

9 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Sce2#
    • 1...Qh3
      • 2.Sce2#
    • 1...Qe2
      • 2.Scxe2#
    • 1...Ra1
      • 2.Sd5#
    • 1...Ra2
      • 2.Sd5#
    • 1...Ra3
      • 2.Sd5#
    • 1...Ra4
      • 2.Sd5#
    • 1...Rd5
      • 2.Sxd5#
    • 1...Rf5
      • 2.Se6#
    • 1...Bf2
      • 2.Sce2#
    • 1...Sf2
      • 2.Sce2#
    • 1...Sc5
      • 2.Sd5#
    • 1...Sg6
      • 2.Rxf7#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qg4#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Qxf3
        • 2.Rxf3#
      • 1...g4
        • 2.Qxg4#
      • 1...Qh3
        • 2.Se2#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sf2
        • 2.Sce2#
      • 1...Qxd2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qe4#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Sxg6
        • 2.Rxf7#
      • 1...Qe2
        • 2.Sxe2#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sf2
        • 2.Sce2#
      • 1...Sc5
        • 2.Sd5#
      • 1...g4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD::S(C)
    • Q(b);N_GUARD::S(C),XQ(b)
    • R(f);N_GUARD::S(C)
    • R(f);N_GUARD::S(C),XR(f)
    • R(j);SBLOCK::S(E)
    • B(a);S_CUTQ(b)::S(C)
    • S(c);S_CUTQ(b)::S(C)
    • S(c);S_CUTR(f)::S(C)
    • S(l);N_GUARD::R(I),XR(j)
  • Tries
    • Try
      • Q(F);P_SPINS(E)
      • Threat
        • QAR1(F)
      • Vars
        • B(a);CHECK,OGATE,XS(E)::R(I),XB(a)
        • Q(b);OGATE,P_SPINQ(b),XP(D)::R1(A),XQ(b)
        • P(h);::QAR1(F),XP(h)
        • Q(b);N_GUARD::S(C)
        • R(j);N_GUARD::QAR1(F),XR(j)
        • S(c);N_PINS(E),S_CUTQ(b)::S(C)
      • Refutation
        • Q(b);XP(B)
  • Actual
    • Q(F);P_SPINS(E)
    • Threat
      • QAR1(F)
    • Vars
      • B(a);CHECK,OGATE,XS(E)::R(I),XB(a)
      • S(l);N_GUARD,XQ(F)::R(I),XR(j)
      • Q(b);N_GUARD::S(C),XQ(b)
      • R(j);N_GUARD::QAR1(F),XR(j)
      • S(c);N_PINS(E),S_CUTQ(b)::S(C)
      • S(c);N_PINS(E),S_CUTR(f)::S(C)
      • P(h);OGATE::QAR1(F),XP(h)
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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).