MESON Chess Problem Database

Problem Display
PID: 137226 (5Qr1/p2r1p2/q7/p1Npn2P/b2B1kpP/4RpN1/2B1PR1P/5K2 w - - 0 1)

Fegan, Bertram George

Australasian Chess Magazine, 1920

5Qr1/p2r1p2/q7/p1Npn2P/b2B1kpP/4RpN1/2B1PR1P/5K2

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2+
      • 2.Sxe2#
    • 1...Qd3
      • 2.Se6#
    • 1...Qc4
      • 2.Se6#
    • 1...Qb5
      • 2.Se6#
    • 1...Qb7
      • 2.Se6#
    • 1...Qc8
      • 2.Se6#
    • 1...Qe6
      • 2.Sxe6#
    • 1...Bc6
      • 2.Se6#
    • 1...Sc4
      • 2.Sd3#
    • 1...Sc6
      • 2.Se6#
    • 1...Sg6
      • 2.Qh6#
    • 1...f5
      • 2.Qxf5#
  • Tries
    • 1.Ra3?
      • threat
        • 2.Be3#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qd3
        • 2.Se6#
      • 1...Sd3
        • 2.e3#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sc6
        • 2.Se6#
      • 1...Sg6
        • 2.Qh6#
      • 1...Bb3!
    • 1.Rb3?
      • threat
        • 2.Be3#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qd3
        • 2.Se6#
      • 1...Sd3
        • 2.e3#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sc6
        • 2.Se6#
      • 1...Sg6
        • 2.Qh6#
      • 1...Bxb3!
    • 1.Rd3?
      • threat
        • 2.Be3#
        • 2.e3#
      • 1...Qxd3
        • 2.Se6#
      • 1...Sxd3
        • 2.e3#
      • 1...Sc6
        • 2.Se6#
        • 2.e3#
      • 1...Sg6
        • 2.Qh6#
        • 2.e3#
      • 1...Sc4!
    • 1.Qh6+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Qxh6!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Be3#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qd3
        • 2.Se6#
      • 1...Sd3
        • 2.e3#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sc6
        • 2.Se6#
      • 1...Sg6
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(h);CHECK,XP(C)::S(G),XQ(h)
    • Q(h);N_GUARD::S(J)
    • Q(h);N_GUARD,N_PINP(C)::S(J)
    • Q(h);N_GUARD,N_PINP(C)::S(J),XQ(h)
    • B(b);S_CUTQ(h)::S(J)
    • S(g);N_GUARD,N_PINP(C),S_CUTQ(h)::S(J)
    • S(g);S_CUTQ(h)::S(J)
    • S(g);S_CUTQ(h),S_CUTR(l)::QAB(L)
    • P(k);OGATE::QAR1(L),XP(k)
  • Tries
    • Try
      • R(F);
      • Threat
        • B(H)
      • Vars
        • Q(h);CHECK,XP(C)::S(G),XQ(h)
        • Q(h);N_GUARD::S(J)
        • S(g);N_PINP(C)::P(C)
        • S(g);N_GUARD,N_PINP(C),S_CUTQ(h)::S(J)
        • S(g);S_CUTQ(h)::S(J)
        • S(g);S_CUTQ(h),S_CUTR(l)::QAB(L)
      • Refutation
        • B(b);
    • Try
      • R(F);
      • Threat
        • B(H)
      • Vars
        • Q(h);CHECK,XP(C)::S(G),XQ(h)
        • Q(h);N_GUARD::S(J)
        • S(g);N_PINP(C)::P(C)
        • S(g);N_GUARD,N_PINP(C),S_CUTQ(h)::S(J)
        • S(g);S_CUTQ(h)::S(J)
        • S(g);S_CUTQ(h),S_CUTR(l)::QAB(L)
      • Refutation
        • B(b);XR(F)
    • Try
      • R(F);N_SPINP(C)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);N_GUARD,P_PINP(C),XR(F)::S(J)
        • S(g);XR(F)::P(C)
      • Refutation
        • S(g);
    • Try
      • Q(L);CHECK
      • Vars
        • R(l);N_GUARD,P_SPINR(l)::QAB1(L),XR(l)
      • Refutation
        • Q(h);N_PINP(C),XQ(L)
  • Actual
    • R(F);
    • Threat
      • B(H)
    • Vars
      • Q(h);CHECK,XP(C)::S(G),XQ(h)
      • Q(h);N_GUARD::S(J)
      • S(g);N_PINP(C)::P(C)
      • S(g);N_GUARD,N_PINP(C),S_CUTQ(h)::S(J)
      • S(g);S_CUTQ(h)::S(J)
      • S(g);S_CUTQ(h),S_CUTR(l)::QAB(L)
HTML5 logo

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).