MESON Chess Problem Database

Problem Display
PID: 144715 (5N1B/5r1b/B4nR1/8/1QnkPR2/2r5/1p1pp1N1/1Kb5 w - - 0 1)

Boros, Sandor

Magyar Sakkvilag, 1931

5N1B/5r1b/B4nR1/8/1QnkPR2/2r5/1p1pp1N1/1Kb5

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qc5#
  • Tries
    • 1.Se6+?
      • 1...Kd3
        • 2.Rg3#
      • 1...Ke5!
    • 1.Bxf6+?
      • 1...Kd3
        • 2.Rg3#
        • 2.Qxc3#
        • 2.Qd6#
      • 1...Rxf6!
    • 1.Qc5+?
      • 1...Kd3
        • 2.Rg3#
        • 2.Qe3#
      • 1...Kxc5!
    • 1.Qxc4+?
      • 1...Ke5
        • 2.Qd5#
      • 1...Rxc4!
    • 1.Qb6+?
      • 1...Kd3
        • 2.Rg3#
        • 2.Qe3#
      • 1...Ke5
        • 2.Qc5#
      • 1...Sxb6!
  • Keys
    • 1.e5+!
      • 1...Kd3
        • 2.Rg3#
      • 1...Kd5
        • 2.Qb5#
      • 1...Kxe5
        • 2.Qc5#
      • 1...Se4
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);N_SPINS(f),P_SPINS(h),S_FLIGHT::QAR2(C)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(g);P-FLIGHT::R(G)
      • Refutation
        • K(g);N_SPINS(f),P_SPINS(h),S_FLIGHT
    • Try
      • B(I);CHECK,XS(h)
      • Refutation
        • R(i);XB(I)
    • Try
      • Q(C);CHECK,N_PINS(f),P_PINS(h)
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK,P_PINS(h),XS(f)
      • Vars
        • K(g);S_FLIGHT::QAR1(C)
      • Refutation
        • R(e);XQ(C)
    • Try
      • Q(C);CHECK,N_PINS(f),P_PINS(h)
      • Vars
        • K(g);S_FLIGHT::QAR2(C)
      • Refutation
        • S(f);XQ(C)
  • Actual
    • P(D);CHECK,P_SPINR(G)
    • Vars
      • K(g);N_PINR(G),P-FLIGHT::R(G)
      • K(g);N_SPINS(f),P-FLIGHT::QAR2(C)
      • K(g);N_SPINS(f),P_SPINS(h),S_FLIGHT,XP(D)::QAR2(C)
      • S(h);N_PINR(G)::R(G)
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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).