MESON Chess Problem Database

Problem Display
PID: 179113 (8/8/3n1Q2/P3pq2/1B4N1/7K/6RP/5k2 w - - 0 1)

Restad, Birger

Arbeidermagasinet, 1936

8/8/3n1Q2/P3pq2/1B4N1/7K/6RP/5k2

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Qxf2#
    • 1...Qf3+
      • 2.Qxf3#
    • 1...Qf4
      • 2.Se3#
    • 1...Qxf6
      • 2.Se3#
    • 1...Sc4
      • 2.Qxf5#
    • 1...Se4
      • 2.Qa6#
    • 1...Sb5
      • 2.Qxf5#
    • 1...Sb7
      • 2.Qxf5#
    • 1...Sf7
      • 2.Qxf5#
    • 1...Sc8
      • 2.Qxf5#
    • 1...Se8
      • 2.Qxf5#
    • 1...e4
      • 2.Qa1#
  • Tries
    • 1.Bc3?
      • 1...Qf3+
        • 2.Qxf3#
      • 1...Qxf6
        • 2.Se3#
      • 1...Qf2
        • 2.Qxf2#
      • 1...Qf4
        • 2.Se3#
      • 1...Sc4
        • 2.Qxf5#
      • 1...Se4
        • 2.Qa6#
      • 1...Sb5
        • 2.Qxf5#
      • 1...Sb7
        • 2.Qxf5#
      • 1...Sf7
        • 2.Qxf5#
      • 1...Sc8
        • 2.Qxf5#
      • 1...Se8
        • 2.Qxf5#
      • 1...e4!
    • 1.Rf2+?
      • 1...Qxf2
        • 2.Qxf2#
      • 1...Kg1!
    • 1.a6?
      • 1...Qf3+
        • 2.Qxf3#
      • 1...Qxf6
        • 2.Se3#
      • 1...Qf2
        • 2.Qxf2#
      • 1...e4
        • 2.Qa1#
      • 1...Qf4
        • 2.Se3#
      • 1...Sc4
        • 2.Qxf5#
      • 1...Sb5
        • 2.Qxf5#
      • 1...Sb7
        • 2.Qxf5#
      • 1...Sf7
        • 2.Qxf5#
      • 1...Sc8
        • 2.Qxf5#
      • 1...Se8
        • 2.Qxf5#
      • 1...Se4!
  • Keys
    • 1.Bd2!
      • 1...Qf3+
        • 2.Qxf3#
      • 1...Qxf6
        • 2.Se3#
      • 1...Qf2
        • 2.Qxf2#
      • 1...Qf4
        • 2.Se3#
      • 1...Sc4
        • 2.Qxf5#
      • 1...Se4
        • 2.Qa6#
      • 1...Sb5
        • 2.Qxf5#
      • 1...Sb7
        • 2.Qxf5#
      • 1...Sf7
        • 2.Qxf5#
      • 1...Sc8
        • 2.Qxf5#
      • 1...Se8
        • 2.Qxf5#
      • 1...e4
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_PINS(E),OGATE::QAR1(G),XQ(c)
    • Q(c);CHECK,N_PINS(E),OGATE::QAR2(G),XQ(c)
    • Q(c);N_PINS(E)::S(E)
    • Q(c);N_PINS(E),N_SPINQ(c),XQ(G)::S(E)
    • S(d);N_GUARD::QAR(G),XQ(c)
    • S(d);OGATE::QAB(G)
    • P(b);OGATE::QAR(G)
  • Tries
    • Try
      • B(D);
      • Vars
        • Q(c);CHECK,N_PINS(E),OGATE::QAR2(G),XQ(c)
        • Q(c);N_PINS(E),N_SPINQ(c),XQ(G)::S(E)
        • Q(c);N_PINS(E),OGATE::QAR1(G),XQ(c)
        • Q(c);N_PINS(E)::S(E)
        • S(d);N_GUARD::QAR(G),XQ(c)
        • S(d);OGATE::QAB(G)
      • Refutation
        • P(b);
    • Try
      • R(A);CHECK,N_PINQ(c)
      • Vars
        • Q(c);N_PINS(E),OGATE,P_SPINQ(c),XR(A)::QAR1(G),XQ(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(F);
      • Vars
        • Q(c);CHECK,N_PINS(E),OGATE::QAR2(G),XQ(c)
        • Q(c);N_PINS(E),N_SPINQ(c),XQ(G)::S(E)
        • Q(c);N_PINS(E),OGATE::QAR1(G),XQ(c)
        • P(b);OGATE::QAR(G)
        • Q(c);N_PINS(E)::S(E)
        • S(d);N_GUARD::QAR(G),XQ(c)
      • Refutation
        • S(d);
  • Actual
    • B(D);
    • Vars
      • Q(c);CHECK,N_PINS(E),OGATE::QAR2(G),XQ(c)
      • Q(c);N_PINS(E),N_SPINQ(c),XQ(G)::S(E)
      • Q(c);N_PINS(E),OGATE::QAR1(G),XQ(c)
      • Q(c);N_PINS(E)::S(E)
      • S(d);N_GUARD::QAR(G),XQ(c)
      • S(d);OGATE::QAB(G)
      • P(b);OGATE::QAR(G)
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).