MESON Chess Problem Database

Problem Display
PID: 179042 (5r1b/p2pN3/6b1/1RP1p3/3kn1nR/KP1p2p1/1P6/4Q3 w - - 0 1)

Easter, Norris

Magasinet, 1939

5r1b/p2pN3/6b1/1RP1p3/3kn1nR/KP1p2p1/1P6/4Q3

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.bxc3#
    • 1...Sxc5
      • 2.Rb4#
    • 1...Se3
      • 2.Qc3#
    • 1...Sf6
      • 2.Qg1#
    • 1...d5
      • 2.Sc6#
  • Keys
    • 1.c6!
      • threat
        • 2.Rd5#
      • 1...dxc6
        • 2.Sxc6#
      • 1...Bf7
        • 2.Sf5#
      • 1...Sc3
        • 2.bxc3#
      • 1...Sc5
        • 2.Rb4#
      • 1...Sef6
        • 2.Qxe5#
      • 1...Se3
        • 2.Qc3#
      • 1...Sgf6
        • 2.Qg1#
      • 1...d5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(d);OGATE,P_SPINS(e)::P(B),XS(d)
    • S(d);P_SPINS(e),SBLOCK,XP(G)::R(F)
    • S(e);P_SPINS(d),SBLOCK::QAB1(A)
    • S(e);N_GUARD,P_SPINS(d),S_CUTR(j)::QAB(A)
    • P(i);N_GUARD,SBLOCK::S(H)
  • Actual
    • P(G);
    • Threat
      • R1(F)
    • Vars
      • P(i);XP(G)::S(H),XP(i)
      • B(g);N_GUARD,S_CUTR(j)::S(H)
      • S(d);OGATE,P_SPINS(e)::P(B),XS(d)
      • S(d);P_SPINS(e),SBLOCK::R(F)
      • S(d);OGATE,P_SPINS(e)::QAB1(A),XP(f)
      • S(e);P_SPINS(d),SBLOCK::QAB1(A)
      • S(e);N_GUARD,P_SPINS(d),S_CUTR(j)::QAB(A)
      • P(i);::R1(F),XP(i)
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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).