MESON Chess Problem Database

Problem Display
PID: 48743 (1b1N1n1B/1Q3P2/B7/4P3/2rkN1K1/5p2/1n1Pp3/2RR4 w - - 0 1)

Boros, Sandor

1st Prize, Brisbane Courier, 1932

1b1N1n1B/1Q3P2/B7/4P3/2rkN1K1/5p2/1n1Pp3/2RR4

#2

11 + 7

371 The Chess Review 1933
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qd5#
    • 1...Rc7
      • 2.e6#
    • 1...Sd3
      • 2.Rxc4#
  • Tries
    • 1.Se6+?
      • 1...Kd3
        • 2.Rc3#
        • 2.Qd5#
      • 1...Sxe6!
    • 1.Rxc4+?
      • 1...Kd3
        • 2.Sf2#
        • 2.Sc5#
        • 2.Qd5#
        • 2.Qb3#
      • 1...Sxc4!
    • 1.e6+?
      • 1...Kd3
        • 2.Rc3#
        • 2.Qd5#
      • 1...Be5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qd5#
      • 1...Kd3+
        • 2.Qe4#
      • 1...Kc5+
        • 2.d4#
      • 1...Kxe5+
        • 2.Se4#
      • 1...Rc5
        • 2.Qe4#
      • 1...Rc6
        • 2.Sxc6#

Anticipated by 173692(1925)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(e);P-FLIGHT,P_PINS(D),P_SPINR(d)::QAR2(H)
    • R(d);S_CUTB(f)::B(K)+P(F)
    • S(a);N_GUARD,SBLOCK::R1(A),XR(d)
  • Tries
    • Try
      • S(J);CHECK
      • Refutation
        • S(g);XS(J)
    • Try
      • R(A);CHECK,XR(d)
      • Refutation
        • S(a);XR(A)
    • Try
      • P(F);CHECK
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • S(D);
    • Threat
      • QAR1(H)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINR(d)::QAB1(H)
      • K(e);CHECK,OGATE,P_SPINR(d),S_FLIGHT::P(C)
      • K(e);CHECK,S_FLIGHT,XP(F)::B(K)+S(D)
      • R(d);::QAR1(H)
      • R(d);N_GUARD::S(J),XR(d)
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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).