MESON Chess Problem Database

Problem Display
PID: 202674 (B3R3/4b3/8/1K1Pr3/2QNk3/3N4/3P4/B7 w - - 0 1)

Jakab, Arpad

2nd Prize, Uj Nemzedek, 1923

B3R3/4b3/8/1K1Pr3/2QNk3/3N4/3P4/B7

#2

9 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5+
      • 2.Bxd5#
    • 1...Re6
      • 2.dxe6#
      • 2.d6#
    • 1...Ba3
      • 2.Rxe5#
    • 1...Bb4
      • 2.Rxe5#
    • 1...Bh4
      • 2.Rxe5#
    • 1...Bc5
      • 2.Rxe5#
      • 2.d6#
    • 1...Bg5
      • 2.Rxe5#
    • 1...Bd8
      • 2.Rxe5#
    • 1...Bf8
      • 2.Rxe5#
  • Tries
    • 1.Rxe7?
      • threat
        • 2.Rxe5#
      • 1...Re6
        • 2.Rxe6#
        • 2.dxe6#
        • 2.d6#
      • 1...Rxe7!
  • Keys
    • 1.Qc7!
      • 1...Rxd5+
        • 2.Sc5#
      • 1...Kxd3
        • 2.Qc2#
      • 1...Rf5
        • 2.Sc5#
      • 1...Rg5
        • 2.Sf2#
        • 2.Sc5#
      • 1...Rh5
        • 2.Sf2#
        • 2.Sc5#
      • 1...Re6
        • 2.Sf2#
      • 1...Ba3
        • 2.Qh7#
      • 1...Bb4
        • 2.Qh7#
      • 1...Bh4
        • 2.Qh7#
      • 1...Bc5
        • 2.Qh7#
      • 1...Bg5
        • 2.Qh7#
      • 1...Bd6
        • 2.Qh7#
      • 1...Bf6
        • 2.Qh7#
      • 1...Bd8
        • 2.Qh7#
      • 1...Bf8
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,OGATE,P_SPINB(c),P_SPINR(b),XP(G)::B(H),XR(b)
    • B(c);OGATE,P_SPINR(b)::R1(I),XR(b)
  • Tries
    • Try
      • R(I);P_PINR(b),XB(c)
      • Threat
        • R1(I),XR(b)
      • Refutation
        • R(b);N_PINP(G),N_SPINR(b),XR(I)
  • Actual
    • Q(D);
    • Vars
      • R(b);CHECK,P_SPINB(c),P_SPINR(b),XP(G)::S(C)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(D)
      • R(b);P_SPINB(c)::S(C)
      • R(b);N_PINP(G)::S(C)
      • B(c);OGATE,P_SPINR(b)::QAB(D)
      • B(c);N_PINP(G),OGATE,P_SPINR(b)::QAB(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).