MESON Chess Problem Database

Problem Display
PID: 187797 (3r1B2/2Q3p1/2B1k1P1/6P1/2P4p/4K1b1/4RP2/8 w - - 0 1)

Kramer, Gyula

Pesti Naplo, 1909

3r1B2/2Q3p1/2B1k1P1/6P1/2P4p/4K1b1/4RP2/8

#2

9 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Bxd7#
    • 1...Ra8
      • 2.Bd7#
    • 1...Rb8
      • 2.Bd7#
    • 1...Rc8
      • 2.Bd7#
    • 1...Re8
      • 2.Bd7#
    • 1...Bf4+
      • 2.Kxf4#
    • 1...Be5
      • 2.Qf7#
  • Tries
    • 1.Kf3+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Qxe5#
        • 2.Qf7#
      • 1...Kf5!
    • 1.Qd7+?
      • 1...Ke5
        • 2.Kf3#
        • 2.Bd6#
        • 2.Bxg7#
      • 1...Rxd7!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Kf3#
      • 1...Rd3+
        • 2.Kxd3#
      • 1...Bxf2+
        • 2.Kxf2#
      • 1...Bxf4+
        • 2.Kxf4#
      • 1...Rd2
        • 2.Kxd2#
      • 1...Rd4
        • 2.Kxd4#
      • 1...Rd5
        • 2.cxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(e);N_GUARD::B(F),XR(e)
    • R(e);N_GUARD::B(F)
    • B(a);CHECK::R(A)+K(C),XB(a)
    • B(a);SBLOCK::QAB1(H)
  • Tries
    • Try
      • K(C);CHECK,P-FLIGHT
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • R(e);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • R(A)+K(C)
    • Vars
      • R(e);CHECK::R(A)+K(C),XR(e)
      • B(a);CHECK,XP(B)::R(A)+K(C),XB(a)
      • B(a);CHECK,XQ(H)::R(A)+K(C),XB(a)
      • R(e);::R(A)+K(C),XR(e)
      • R(e);OGATE::P(D),XR(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).