MESON Chess Problem Database

Problem Display
PID: 157250 (3qR3/QBPpb3/3N4/6p1/3P1Pb1/K1RPk1P1/pnPppp1r/B2r3N w - - 0 1)

Bakcsi, Gyorgy

Magyar Sakkelet, 1957

3qR3/QBPpb3/3N4/6p1/3P1Pb1/K1RPk1P1/pnPppp1r/B2r3N

#2

14 + 13

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.d5#
    • 1...Sxd3
      • 2.Rxd3#
    • 1...Sc4+
      • 2.dxc4#
  • Tries
    • 1.Rxe7+?
      • 1...Be6
        • 2.Sf5#
      • 1...Qxe7!
    • 1.Qc5?
      • threat
        • 2.Qe5#
      • 1...Sc4+
        • 2.Sxc4#
        • 2.dxc4#
      • 1...Bf3
        • 2.Sf5#
        • 2.d5#
      • 1...Bf5
        • 2.Sxf5#
      • 1...Qa8+!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Re5#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Kxd4
        • 2.Rc4#
      • 1...Sxd3
        • 2.Sc4#
      • 1...Bf3
        • 2.Sf5#
      • 1...Bf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(i);SBLOCK::QAB(K)+P(H)
    • S(c);OGATE,P_SPINS(c),XP(F)::R1(E),XS(c)
    • S(c);CHECK,OGATE::R(E)+P(F),XS(c)
  • Tries
    • Try
      • R(N);CHECK,N_SPINS(J),XB(l)
      • Vars
        • B(i);P_SPINB(i)::S(J)
      • Refutation
        • Q(m);P_PINS(J),XR(N)
    • Try
      • Q(K);N_SPINS(J)
      • Threat
        • QAR2(K)
      • Vars
        • B(i);N_GUARD::S(J),XB(i)
      • Refutation
        • Q(m);CHECK
  • Actual
    • R(E);N_SPINS(J)
    • Threat
      • R(E)
    • Vars
      • S(c);CHECK,N_GUARD::S(J),XS(c)
      • K(h);N_SPINB(l),OGATEB,P_SPINS(c),S_FLIGHT,XP(H)::QAB(K)+R(E),DCHECK
      • S(c);N_GUARD,XP(F)::S(J)
      • B(i);N_GUARD::S(J)
      • B(i);N_GUARD::S(J),XB(i)
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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).