MESON Chess Problem Database

Problem Display
PID: 242739 (4Rbq1/8/4NRp1/B6n/3PkpQ1/1K3N1r/2PP1pB1/7b w - - 0 1)

Bakcsi, Gyorgy

Magyar Sakkelet, 1971

4Rbq1/8/4NRp1/B6n/3PkpQ1/1K3N1r/2PP1pB1/7b

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sc7#
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Rh2
      • 2.Sg5#
    • 1...Rxf3+
      • 2.Qxf3#
    • 1...Rh4
      • 2.Sg5#
    • 1...Sg3
      • 2.Sg5#
    • 1...g5
      • 2.Qf5#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Sg5#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Kd5
        • 2.Sc7#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...g5
        • 2.Sxg5#
        • 2.Qf5#
      • 1...Bxg2!
    • 1.Qxh3?
      • threat
        • 2.Sg5#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Kd5
        • 2.Sc7#
      • 1...g5
        • 2.Sxg5#
        • 2.Qf5#
      • 1...Bxg2!
    • 1.Qxf4+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Sxf4!
    • 1.Qxg6+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Qxg6!
    • 1.d3+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Ke3!
  • Keys
    • 1.c4!
      • threat
        • 2.Sc5#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Kd3
        • 2.Se5#
      • 1...Qxe6
        • 2.Qxg6#
      • 1...Bc5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • K(d);N_SPINP(e),S_FLIGHT::S(I)
    • Q(i);CHECK,OGATE,P_SPINQ(i),XS(I)::QAR2(G),XQ(i)
    • R(c);N_PINS(E),P_PINS(I)::B(C)+S(E),DCHECK
    • R(c);CHECK,OGATE,P_PINS(I),P_SPINR(c),XS(E)::QAB1(G),XR(c)
    • S(f);N_PINS(E),P_PINS(I)::B(C)+S(E),DCHECK
    • P(g);N_GUARD::QAB1(G)
  • Tries
    • Try
      • B(H);N_SPINS(E),P_SPINS(I)
      • Threat
        • B(C)+S(E),DCHECK
      • Vars
        • Q(i);CHECK,OGATE,P_SPINQ(i),XS(I)::QAR2(G),XQ(i)
        • K(d);N_PINS(I),N_SPINP(e),S_FLIGHT::S(I)
        • R(c);OGATE,P_PINB(H),P_SPINR(c),XS(E)::QAB1(G),XR(c)
      • Refutation
        • B(a);XB(C)
    • Try
      • Q(G);N_PINP(e),N_SPINS(E),P_SPINS(I),XR(c)
      • Threat
        • B(C)+S(E),DCHECK
      • Vars
        • Q(i);CHECK,OGATE,P_SPINQ(i),XS(I)::QAR2(G),XQ(i)
        • K(d);N_PINS(I),S_FLIGHT::S(I)
      • Refutation
        • B(a);XB(C)
    • Try
      • Q(G);CHECK,XP(e)
      • Vars
        • K(d);S_FLIGHT::S(I)
      • Refutation
        • S(f);XQ(G)
    • Try
      • Q(G);CHECK,N_PINP(e),XP(g)
      • Vars
        • K(d);S_FLIGHT::S(I)
      • Refutation
        • Q(i);XQ(G)
    • Try
      • P(B);CHECK,N_SPINS(E),P_SPINS(I)
      • Vars
        • K(d);N_PINS(I),N_SPINP(e),S_FLIGHT::S(I)
      • Refutation
        • K(d);N_SPINP(e),P-FLIGHT
  • Actual
    • P(A);
    • Threat
      • R(K)+S(I),DCHECK
    • Vars
      • R(c);CHECK,OGATE,P_SPINR(c),XS(E)::QAB1(G),XR(c)
      • K(d);N_PINS(E),N_SPINP(e),S_FLIGHT::S(E)
      • Q(i);N_GUARD,P_PINP(A),P_SPINQ(i),XS(I)::QAB(G),XP(g)
      • B(h);::R(K)+S(I),DCHECK,XB(h)
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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).