MESON Chess Problem Database

Problem Display
PID: 71562 (4K2N/b1p5/4Nk1p/2r5/8/1B6/1R2Q3/B7 w - - 0 1)

Ceder, Sven Ture

Schackvarlden, 1942

4K2N/b1p5/4Nk1p/2r5/8/1B6/1R2Q3/B7

#2

7 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Rb1+?
      • 1...Kf5
        • 2.Rf1#
        • 2.Qf3#
      • 1...Re5
        • 2.Qf3#
        • 2.Qxe5#
      • 1...Rc3!
    • 1.Ra2+?
      • 1...Kf5
        • 2.Qf3#
      • 1...Re5
        • 2.Qf3#
        • 2.Qxe5#
      • 1...Rc3!
    • 1.Rc2+?
      • 1...Kf5
        • 2.Qf3#
      • 1...Re5
        • 2.Qf3#
        • 2.Qxe5#
      • 1...Rc3!
    • 1.Rd2+?
      • 1...Kf5
        • 2.Qf3#
      • 1...Re5
        • 2.Qf3#
        • 2.Qxe5#
      • 1...Rc3!
    • 1.Qf1+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Rf5!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Sf7#
        • 2.Qf4#
      • 1...Rf5!
    • 1.Qf2+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Rf5!
    • 1.Qe3?
      • threat
        • 2.Rf2#
      • 1...Kf5
        • 2.Qf4#
      • 1...Rc2
        • 2.Qf4#
      • 1...Rf5!
    • 1.Qe4?
      • threat
        • 2.Rf2#
      • 1...Rc3
        • 2.Qf4#
      • 1...Rc2
        • 2.Qf4#
      • 1...Re5
        • 2.Qg6#
      • 1...Rf5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Rf2#
      • 1...Ke5
        • 2.Qf4#
      • 1...Rc3
        • 2.Qf4#
      • 1...Rc2
        • 2.Qf4#
      • 1...Re5
        • 2.Qg6#
      • 1...Rf5
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(C);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(C);
      • Threat
        • B(A)+R(B),DCHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • R(a);N_GUARD::QAR2(C)
      • Refutation
        • R(a);
    • Try
      • Q(C);
      • Threat
        • B(A)+R(B),DCHECK
      • Vars
        • R(a);N_GUARD::QAR2(C)
        • R(a);P_PINS(E),SBLOCK::QAR1(C)
      • Refutation
        • R(a);
  • Actual
    • Q(C);
    • Threat
      • B(A)+R(B),DCHECK
    • Vars
      • K(b);S_FLIGHT::QAB1(C)
      • R(a);N_GUARD::QAR2(C)
      • R(a);P_PINS(E),SBLOCK::QAR1(C)
      • R(a);SBLOCK::QAB1(C)
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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).