MESON Chess Problem Database

Problem Display
PID: 189533 (n2N4/q4p2/p7/R1PkPp2/K4b1r/1PP2P1p/3p1P2/6QB w - - 0 1)

Popp, Richard

4/5 Prize, Budapesti Sakkor, 1911

n2N4/q4p2/p7/R1PkPp2/K4b1r/1PP2P1p/3p1P2/6QB

#2

11 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.cxb6#
    • 1...Qd7+
      • 2.c6#
    • 1...Bh2+
      • 2.f4#
    • 1...Be3+
      • 2.f4#
    • 1...Bg3+
      • 2.f4#
    • 1...Bxe5+
      • 2.f4#
    • 1...Bg5+
      • 2.f4#
    • 1...Bh6+
      • 2.f4#
    • 1...Sb6+
      • 2.cxb6#
  • Tries
    • 1.c4+?
      • 1...Kxe5
        • 2.Qa1#
      • 1...Kd4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.c4#
      • 1...Qd7+
        • 2.c6#
      • 1...Bh2+
        • 2.f4#
      • 1...Be3+
        • 2.f4#
      • 1...Bg3+
        • 2.f4#
      • 1...Bxe5+
        • 2.f4#
      • 1...Bg5+
        • 2.f4#
      • 1...Bh6+
        • 2.f4#
      • 1...Sb6+
        • 2.cxb6#
      • 1...Kxe5
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(h);OGATE::R(H)+P(I),XQ(h)
    • Q(h);CHECK,N_GUARD::R(H)+P(I)
    • B(c);CHECK,OGATE::B(B)+P(F)
    • B(c);CHECK,OGATE,XP(J)::B(B)+P(F)
    • S(j);CHECK,OGATE::R(H)+P(I),XS(j)
  • Tries
    • Try
      • P(E);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(J)::QAB(A)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • P(E)
    • Vars
      • Q(h);CHECK,N_GUARD::R(H)+P(I)
      • B(c);CHECK,OGATE::B(B)+P(F)
      • B(c);CHECK,OGATE,XP(J)::B(B)+P(F)
      • S(j);CHECK,OGATE::R(H)+P(I),XS(j)
      • K(e);P-FLIGHT,XP(J)::QAB(A)+P(E)
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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).