MESON Chess Problem Database

Problem Display
PID: 223338 (b3N1nK/1qpQ4/3p2p1/1R2pR2/5Pkp/3B3p/4r2P/b5N1 w - - 0 1)

May, Willy Paul

Suomen Shakki, 1954

b3N1nK/1qpQ4/3p2p1/1R2pR2/5Pkp/3B3p/4r2P/b5N1

#2

9 + 12

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sh6
      • 2.Sf6#
    • 1...Se7
      • 2.Sf6#
    • 1...exf4+
      • 2.Rfe5#
    • 1...e4+
      • 2.Rf6#
    • 1...d5
      • 2.Bxe2#
    • 1...gxf5
      • 2.Qxf5#
    • 1...c6
      • 2.Bxe2#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qxg6#
      • 1...exf4+
        • 2.Rfe5#
      • 1...e4+
        • 2.Rf6#
      • 1...gxf5
        • 2.Qxf5#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Se7
        • 2.Sf6#
      • 1...g5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qxg6#
      • 1...exf4
        • 2.Rg5#
      • 1...g5
        • 2.Qxg5#
      • 1...Se7
        • 2.Sf6#
      • 1...e4
        • 2.Bxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • S(l);N_GUARD::S(H),XS(l)
    • S(l);N_GUARD::S(H)
    • P(f);CHECK,SBLOCK,XP(D)::QAB(G)+R(F)
    • P(f);CHECK::QAB(G)+R(F)
    • P(g);S_CUTQ(i)::B(C),XR(b)
    • P(h);OGATE,P_SPINP(h),XR(F)::QAB1(G),XP(h)
    • P(j);S_CUTQ(i)::B(C),XR(b)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR2(G),XP(h)
      • Vars
        • P(f);CHECK,SBLOCK,XP(D)::QAB(G)+R(F)
        • P(f);CHECK::QAB(G)+R(F)
        • P(h);OGATE,P_SPINP(h),XR(F)::QAB1(G),XP(h)
        • S(l);N_GUARD::S(H),XS(l)
        • S(l);N_GUARD::S(H)
      • Refutation
        • P(h);
  • Actual
    • Q(G);P_PINP(h)
    • Threat
      • QAR2(G),XP(h)
    • Vars
      • P(f);P_PINQ(G),SBLOCK,XP(D)::R1(F)
      • P(h);OGATE::QAR1(G),XP(h)
      • S(l);N_GUARD::S(H)
      • P(f);P_PINQ(G),S_CUTQ(i)::B(C),XR(b)
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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).