MESON Chess Problem Database

Problem Display
PID: 263280 (4b1Nb/4Np2/rq6/3RpPk1/1p2B3/4P2Q/p3p1r1/K1B5 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Szachy, 1971

4b1Nb/4Np2/rq6/3RpPk1/1p2B3/4P2Q/p3p1r1/K1B5

#2

9 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Bxe3#
    • 1...Qd4+
      • 2.exd4#
  • Tries
    • 1.Qg3+?
      • 1...Kh5
        • 2.Bf3#
      • 1...Rxg3!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Qh5#
      • 1...Qd4+
        • 2.exd4#
      • 1...e4+
        • 2.f6#
      • 1...Qxe3
        • 2.Bxe3#
      • 1...Qg6
        • 2.e4#
      • 1...Qh6
        • 2.e4#
      • 1...Rh2
        • 2.Qg4#
        • 2.Qg3#
      • 1...Rg4
        • 2.Qxg4#
      • 1...f6
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(h);OGATE,P_SPINQ(h),XP(C)::B(B),XQ(h)
    • Q(h);CHECK,OGATE::B(B)+P(C),XQ(h)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(f);P-FLIGHT,S_CUTR(c)::B(E)
      • Refutation
        • R(c);XQ(D)
  • Actual
    • B(E);
    • Threat
      • QAR1(D)
    • Vars
      • Q(h);CHECK,OGATE::B(B)+P(C),XQ(h)
      • P(e);CHECK::R(F)+P(G)
      • Q(h);OGATE,P_SPINQ(h),XP(C)::B(B),XQ(h)
      • Q(h);N_GUARD::B(B)+P(C)
      • R(c);N_GUARD::QAR1(D),XR(c)
      • P(i);S_CUTQ(h)::QAB1(D)
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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).