MESON Chess Problem Database

Problem Display
PID: 229202 (1nqrN3/4R3/1pp1p3/2N1b3/P2k4/3P3r/B1P2R1P/K3Q3 w - - 0 1)

Lapanya, Ferenc

Nepszava, 1926

1nqrN3/4R3/1pp1p3/2N1b3/P2k4/3P3r/B1P2R1P/K3Q3

#2

11 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Sxe6#
    • 1...Qb7
      • 2.Sxe6#
    • 1...Qc7
      • 2.Sxe6#
    • 1...Re3
      • 2.Qb4#
    • 1...Rd5
      • 2.Sb3#
    • 1...Rd7
      • 2.Sxe6#
    • 1...Sd7
      • 2.Sxe6#
  • Tries
    • 1.Qe4+?
      • 1...Kc3
        • 2.Qc4#
      • 1...Kxc5+!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qxe5#
      • 1...Kxc5+
        • 2.Qc3#
      • 1...Bxh2
        • 2.Sb3#
        • 2.c3#
      • 1...Qc7
        • 2.Sxe6#
      • 1...Re3
        • 2.Qb4#
      • 1...Rd5
        • 2.Sb3#
      • 1...Bg3
        • 2.Sb3#
        • 2.c3#
      • 1...Bf4
        • 2.Sb3#
        • 2.c3#
      • 1...Bd6
        • 2.Sb3#
        • 2.c3#
      • 1...Bf6
        • 2.Sb3#
        • 2.c3#
      • 1...Bc7
        • 2.Sb3#
        • 2.c3#
      • 1...Bg7
        • 2.Sb3#
        • 2.c3#
      • 1...Bh8
        • 2.Sb3#
        • 2.c3#
      • 1...Sd7
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(h);N_GUARD::S(I),XP(f)
    • R(a);SBLOCK::QAR2(B)
    • R(i);SBLOCK::S(I)
    • R(i);S_CUTQ(h)::S(I),XP(f)
    • S(g);S_CUTQ(h)::S(I),XP(f)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);CHECK,S_FLIGHT,XS(I)
  • Actual
    • R(E);
    • Threat
      • QAB1(B),XB(c)
    • Vars
      • K(b);CHECK,P_SPINB(c),S_FLIGHT,XS(I)::QAR2(B)
      • Q(h);N_GUARD::S(I),XP(f)
      • R(a);SBLOCK::QAR2(B)
      • R(i);SBLOCK::S(I)
      • S(g);S_CUTQ(h)::S(I),XP(f)
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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).