MESON Chess Problem Database

Problem Display
PID: 271901 (n7/QqP5/4p3/2p3pB/2R1PkN1/pp4N1/r3P1KP/2b4n w - - 0 1)

Hawes, Frederick Thomas

Ravenscroft, Frank

The Problemist, 1956

n7/QqP5/4p3/2p3pB/2R1PkN1/pp4N1/r3P1KP/2b4n

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.Rxe4#
    • 1...Qd5
      • 2.exd5#
    • 1...Qc8
      • 2.e5#
    • 1...Qb6
      • 2.e5#
    • 1...Qxa7
      • 2.e5#
    • 1...Qxc7
      • 2.e5#
    • 1...Qb8
      • 2.e5#
    • 1...Rxe2+
      • 2.Sxe2#
    • 1...Bb2
      • 2.e3#
    • 1...Sxg3
      • 2.hxg3#
  • Tries
    • 1.Qxc5?
      • threat
        • 2.Qf8#
        • 2.Qe5#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Rxe2+
        • 2.Sxe2#
      • 1...Qxc7
        • 2.e5#
      • 1...Sxg3
        • 2.Qf2#
        • 2.Qe5#
        • 2.hxg3#
      • 1...Qd5
        • 2.exd5#
      • 1...Qc8
        • 2.Qe5#
        • 2.e5#
      • 1...Qb4
        • 2.Qe5#
      • 1...Qb8
        • 2.Qe5#
        • 2.e5#
      • 1...Bb2
        • 2.Qe3#
        • 2.e3#
      • 1...e5
        • 2.Qf8#
        • 2.Qxe5#
      • 1...Qb5!
    • 1.Qxa8?
      • threat
        • 2.Qf8#
      • 1...Qxe4+
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Rxe2+
        • 2.Sxe2#
      • 1...Qxc7
        • 2.e5#
      • 1...Sxg3
        • 2.hxg3#
      • 1...Qd5
        • 2.exd5#
      • 1...Qc8
        • 2.e5#
      • 1...Qb8
        • 2.e5#
      • 1...Bb2
        • 2.e3#
      • 1...Qxa8!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qf8#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Rxe2+
        • 2.Sxe2#
      • 1...Qxc7
        • 2.e5#
      • 1...Qxb8
        • 2.e5#
      • 1...Sxg3
        • 2.hxg3#
      • 1...Qd5
        • 2.exd5#
      • 1...Qc8
        • 2.e5#
      • 1...Bb2
        • 2.e3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(j);CHECK,OGATE,P_SPINQ(j),XP(F)::R1(E),XQ(j)
    • Q(j);OGATE::R(E)+P(F),XQ(j)
    • Q(j);OGATE::R(E)+P(F)
    • Q(j);OGATE,XQ(I)::R(E)+P(F)
    • Q(j);OGATE,XP(J)::R(E)+P(F)
    • R(c);CHECK,P_PINP(F),XP(A)::S(D),XR(c)
    • B(a);N_PINP(A),P_PINP(F)::P(A)
    • S(b);OGATE,XS(D)::P(C),XS(b)
  • Tries
    • Try
      • Q(I);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);CHECK,OGATE,P_SPINQ(j),XP(F)::R1(E),XQ(j)
        • R(c);CHECK,P_PINP(F),XP(A)::S(D),XR(c)
        • Q(j);OGATE,XP(J)::R(E)+P(F)
        • Q(j);OGATE::R(E)+P(F),XQ(j)
        • Q(j);::QAB1(I)
      • Refutation
        • Q(j);
    • Try
      • Q(I);XS(k)
      • Threat
        • QAR(I)
      • Vars
        • R(c);CHECK,P_PINP(F),XP(A)::S(D),XR(c)
        • Q(j);OGATE,XP(J)::R(E)+P(F)
        • S(b);OGATE,XS(D)::P(C),XS(b)
        • Q(j);OGATE::R(E)+P(F),XQ(j)
        • Q(j);OGATE::R(E)+P(F)
        • B(a);N_PINP(A),P_PINP(F)::P(A)
      • Refutation
        • Q(j);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • Q(j);CHECK,OGATE,P_SPINQ(j),XP(F)::R1(E),XQ(j)
      • R(c);CHECK,P_PINP(F),XP(A)::S(D),XR(c)
      • Q(j);OGATE,P_SPINQ(j),XP(J)::R(E)+P(F)
      • Q(j);OGATE,XQ(I)::R(E)+P(F)
      • S(b);OGATE,XS(D)::P(C),XS(b)
      • Q(j);OGATE::R(E)+P(F),XQ(j)
      • Q(j);OGATE::R(E)+P(F)
      • B(a);N_PINP(A),P_PINP(F)::P(A)
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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).