MESON Chess Problem Database

Problem Display
PID: 163452 (B7/1r2RK2/N4pR1/N1Pk4/n2p2p1/2nPprp1/1q5B/7Q w - - 0 1)

Masek, Zdenek

Probleemblad, 1977

B7/1r2RK2/N4pR1/N1Pk4/n2p2p1/2nPprp1/1q5B/7Q

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxb7#
    • 1...Qc1
      • 2.Bxb7#
    • 1...Qa3
      • 2.Bxb7#
    • 1...Qa2
      • 2.Bxb7#
    • 1...Qc2
      • 2.Bxb7#
    • 1...Qd2
      • 2.Bxb7#
    • 1...Qe2
      • 2.Bxb7#
    • 1...Qf2
      • 2.Bxb7#
    • 1...Qg2
      • 2.Bxb7#
    • 1...Qxh2
      • 2.Bxb7#
    • 1...Se4
      • 2.dxe4#
    • 1...Sb5
      • 2.Bxb7#
    • 1...Sb6
      • 2.Bxb7#
    • 1...g2
      • 2.Rd7#
    • 1...f5
      • 2.Rd6#
  • Tries
    • 1.Rg5+?
      • 1...f5
        • 2.Rxf5#
      • 1...fxg5+!
    • 1.Qxf3+?
      • 1...Se4
        • 2.Qxe4#
        • 2.Qf5#
        • 2.dxe4#
      • 1...gxf3!
  • Keys
    • 1.Rxf6!
      • threat
        • 2.Rf5#
      • 1...Sxc5
        • 2.Sc7#
      • 1...Qg2
        • 2.Bxb7#
      • 1...Se4
        • 2.dxe4#
      • 1...g2
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD::B(J),XR(k)
    • Q(a);N_GUARD,N_SPINR(d),P_SPINR(k)::B(J),XR(k)
    • Q(a);N_GUARD,XB(B)::B(J),XR(k)
    • S(b);N_SPINR(d),OGATE,P_SPINR(k)::P(C),XS(b)
    • S(b);S_CUTQ(a)::B(J),XR(k)
    • S(f);S_CUTQ(a)::B(J),XR(k)
    • P(e);N_SPINR(d),P_SPINR(k)::R(H)
    • P(j);OGATE::R1(G)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • P(j);P_SPINP(j)::R(G),XP(j)
      • Refutation
        • P(j);CHECK,XR(G)
    • Try
      • Q(A);CHECK,P_PINR(k),XR(d)
      • Refutation
        • P(h);XQ(A)
  • Actual
    • R(G);N_SPINR(H),P_SPINR(G),XP(j)
    • Threat
      • R(G)
    • Vars
      • S(f);SBLOCK,XP(E)::S(F)
      • Q(a);N_GUARD,N_SPINR(d),P_SPINR(k)::B(J),XR(k)
      • S(b);N_SPINR(d),OGATE,P_SPINR(k)::P(C),XS(b)
      • P(e);N_SPINR(d),P_SPINR(k)::R(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).