MESON Chess Problem Database

Problem Display
PID: 72243 (4R3/5p1q/6pp/K3N2r/8/3p1N1P/2p1kpQ1/2Bb2b1 w - - 0 1)

Easter, Norris

Tijdschrift vd NSB, 1931

4R3/5p1q/6pp/K3N2r/8/3p1N1P/2p1kpQ1/2Bb2b1

#2

7 + 11

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh3
      • 2.Sc4#
      • 2.Sg4#
      • 2.Sc6#
      • 2.Sxg6#
      • 2.Sd7#
      • 2.Sxf7#
    • 1...Rh4
      • 2.Sg4#
    • 1...Rxe5+
      • 2.Rxe5#
    • 1...g5
      • 2.Sg6#
    • 1...f5
      • 2.Sf7#
  • Tries
    • 1.Sh2?
      • threat
        • 2.Qf1#
        • 2.Qe4#
      • 1...Rxe5+
        • 2.Rxe5#
      • 1...Ke1
        • 2.Qf1#
      • 1...Rxh3
        • 2.Sef3#
        • 2.Qf1#
      • 1...d2
        • 2.Qe4#
      • 1...Rh4
        • 2.Seg4#
        • 2.Qf1#
      • 1...g5
        • 2.Sg6#
        • 2.Qf1#
      • 1...f5
        • 2.Sf7#
        • 2.Qf1#
      • 1...Bxh2!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qe4#
      • 1...Rxe5+
        • 2.Rxe5#
      • 1...Ke1
        • 2.Qf1#
      • 1...Ke3
        • 2.Qe4#
      • 1...Rxh3
        • 2.Sef3#
      • 1...Rh4
        • 2.Sg4#
      • 1...g5
        • 2.Sg6#
      • 1...f5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(g);N_PINS(F)::R(G)+S(F)
    • R(g);CHECK,OGATE,P_SPINR(g),XS(F)::R(G),XR(g)
    • P(h);N_PINS(F)::R(G)+S(F)
    • P(j);N_PINS(F)::R(G)+S(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);CHECK,OGATE,P_SPINR(g),XS(F)::R(G),XR(g)
        • K(d);N_SPINP(e),P-FLIGHT::QAR1(B)
        • P(f);::QAR2(B)
      • Refutation
        • B(b);XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR2(B)
    • Vars
      • R(g);CHECK,OGATE,P_SPINR(g),XS(F)::R(G),XR(g)
      • K(d);N_SPINP(e),P-FLIGHT::QAR1(B)
      • R(g);N_PINS(F),XP(D)::R(G)+S(F)
      • R(g);N_PINS(F)::R(G)+S(F)
      • P(h);N_PINS(F)::R(G)+S(F)
      • P(j);N_PINS(F)::R(G)+S(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).