MESON Chess Problem Database

Problem Display
PID: 253094 (3bN1b1/5pBk/4p3/5P2/3Q4/8/6K1/8 w - - 0 1)

Pimenov, Vitaly Ivanovich

Umnov, Evgeny Ivanovich

Die Schwalbe, 1930

3bN1b1/5pBk/4p3/5P2/3Q4/8/6K1/8

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Qxh4#
    • 1...Ba5
      • 2.Qh4#
    • 1...Bb6
      • 2.Qh4#
    • 1...Bc7
      • 2.Qh4#
    • 1...f6
      • 2.Qh4#
  • Tries
    • 1.Qd3?
      • threat
        • 2.f6#
      • 1...exf5
        • 2.Qxf5#
      • 1...Bf6
        • 2.fxe6#
      • 1...f6
        • 2.Qh3#
      • 1...e5!
    • 1.f6?
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...e5
        • 2.Qe4#
      • 1...Kg6!
  • Keys
    • 1.Qe4!
      • threat
        • 2.f6#
      • 1...exf5
        • 2.Qxf5#
      • 1...Bf6
        • 2.fxe6#
      • 1...f6
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(d);N_GUARD::QAR(B),XB(d)
    • B(d);N_GUARD::QAR(B)
    • P(b);S_CUTB(d)::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B)+P(C)
      • Vars
        • P(a);OGATE,P_SPINP(a),XP(C)::QAB(B),XP(a)
        • B(d);S_CUTP(b)::QAB(B)+P(C),XP(a)
        • P(b);S_CUTB(d)::QAR(B)
      • Refutation
        • P(a);
    • Try
      • P(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+P(C)
    • Vars
      • P(a);OGATE,P_SPINP(a),XP(C)::QAB(B),XP(a)
      • B(d);S_CUTP(b)::QAB(B)+P(C),XP(a)
      • P(b);S_CUTB(d)::QAR(B)
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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).