MESON Chess Problem Database

Problem Display
PID: 154557 (bbB2K1R/q2pQ1p1/1p3np1/6k1/7p/2rrp2P/3N1R1B/8 w - - 0 1)

Easter, Norris

Aarsskrift for DSK, 1936

bbB2K1R/q2pQ1p1/1p3np1/6k1/7p/2rrp2P/3N1R1B/8

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Se4#
    • 1...Rc7
      • 2.Qe5#
    • 1...Rd5
      • 2.Se4#
    • 1...Rd6
      • 2.Qe5#
    • 1...Be4
      • 2.Sxe4#
    • 1...Be5
      • 2.Qxe5#
    • 1...d5
      • 2.Sf3#
    • 1...d6
      • 2.Bf4#
  • Tries
    • 1.Rf5+?
      • 1...gxf5
        • 2.Qxg7#
      • 1...Kxf5!
    • 1.Rh5+?
      • 1...gxh5
        • 2.Qxg7#
      • 1...Kxh5!
    • 1.Qxe3+?
      • 1...Bf4
        • 2.Qxf4#
      • 1...Rxe3!
  • Keys
    • 1.Kxg7!
      • threat
        • 2.Qxf6#
      • 1...Rc6
        • 2.Se4#
      • 1...Rd6
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#
      • 1...d5
        • 2.Sf3#
      • 1...d6
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(a);S_CUTB(l)::S(A)
    • R(a);S_CUTB(m)::QAR2(E)
    • R(b);S_CUTB(l)::S(A)
    • R(b);S_CUTB(m)::QAR2(E)
    • B(l);N_GUARD::S(A),XB(l)
    • B(m);N_GUARD::QAR2(E),XB(m)
    • P(j);S_CUTB(l)::S(A)
    • P(j);S_CUTB(m)::B(C)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • P(h);SBLOCK,XR(B)::QAR2(E),XP(k)
      • Refutation
        • K(e);N_SPINS(g),P-FLIGHT,P_SPINP(j),XR(B)
    • Try
      • R(H);CHECK
      • Vars
        • P(h);SBLOCK,XR(H)::QAR2(E),XP(k)
      • Refutation
        • K(e);N_SPINS(g),P-FLIGHT,XR(H)
    • Try
      • Q(E);CHECK,N_PINS(g),XP(c)
      • Vars
        • B(m);N_GUARD,P_SPINB(m)::QAB1(E),XB(m)
      • Refutation
        • R(b);XQ(E)
  • Actual
    • K(G);S_FLIGHT,XP(k)
    • Threat
      • QAB1(E),XS(g)
    • Vars
      • R(a);S_CUTB(l)::S(A)
      • R(b);S_CUTB(m)::QAR2(E)
      • B(m);N_GUARD::QAR2(E),XB(m)
      • P(j);P_PINQ(E),S_CUTB(l)::S(A)
      • P(j);P_PINQ(E),S_CUTB(m)::B(C)
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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).