MESON Chess Problem Database

Problem Display
PID: 125525 (rQb3K1/1n3N1p/p3R1N1/5knP/6rP/2PP3B/1B1p4/4q3 w - - 0 1)

Eriksson, Finn Olof

Vart Hem, 1938

rQb3K1/1n3N1p/p3R1N1/5knP/6rP/2PP3B/1B1p4/4q3

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Qe5#
    • 1...Qxh4
      • 2.Qe5#
    • 1...Qa1
      • 2.Qe5#
    • 1...Qb1
      • 2.Qe5#
    • 1...Qc1
      • 2.Qe5#
    • 1...Qd1
      • 2.Qe5#
    • 1...Qf1
      • 2.Qe5#
    • 1...Qg1
      • 2.Qe5#
    • 1...Qh1
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qxe6
      • 2.Qf4#
    • 1...Se4
      • 2.Qe5#
  • Tries
    • 1.Re5+?
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Kf6!
    • 1.hxg5?
      • threat
        • 2.Rf6#
      • 1...Qxe6
        • 2.Sh4#
        • 2.Qf4#
      • 1...Bxe6
        • 2.Se7#
      • 1...Qe5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Kxe6!
  • Keys
    • 1.c4!
      • threat
        • 2.Rf6#
      • 1...Kxe6
        • 2.Bxg4#
      • 1...Qxe6
        • 2.Qf4#
      • 1...Bxe6
        • 2.Se7#
      • 1...Sxe6
        • 2.Sh6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Se4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::QAR1(J)
    • Q(a);N_GUARD,XP(E)::QAR1(J)
    • Q(a);N_GUARD::QAR1(J),XQ(a)
    • Q(a);P_PINS(I),SBLOCK,XR(G)::QAR1(J)
    • S(e);P_PINS(H),S_CUTQ(a)::QAR1(J)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • Q(a);OGATE,XR(G)::QAR1(J),XQ(a)
      • Refutation
        • K(d);N_SPINR(c),P-FLIGHT
    • Try
      • P(E);XS(e)
      • Threat
        • R1(G)
      • Vars
        • B(j);P_PINQ(J),P_PINS(I),SBLOCK,XR(G)::S(H)
      • Refutation
        • K(d);S_FLIGHT,XR(G)
  • Actual
    • P(B);
    • Threat
      • R1(G)
    • Vars
      • K(d);S_FLIGHT,XR(G)::B(D),XR(c)
      • Q(a);P_PINS(I),SBLOCK,XR(G)::QAR1(J)
      • B(j);P_PINQ(J),P_PINS(I),SBLOCK,XR(G)::S(H)
      • S(e);P_PINS(H),SBLOCK,XR(G)::S(I)
      • Q(a);N_GUARD::QAR1(J),XQ(a)
      • S(e);P_PINS(H),S_CUTQ(a)::QAR1(J)
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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).