MESON Chess Problem Database

Problem Display
PID: 275802 (8/5Bp1/3p4/B2Pq3/5P2/7N/3PkPp1/RR2N1K1 w - - 0 1)

Gelitz, Jurgen

Schach, 2024

8/5Bp1/3p4/B2Pq3/5P2/7N/3PkPp1/RR2N1K1

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa1
      • 2.Bh5#
    • 1...Qb2
      • 2.Bh5#
    • 1...Qd4
      • 2.Bh5#
    • 1...Qxf4
      • 2.Sxf4#
    • 1...Qf6
      • 2.Bh5#
    • 1...Qh5
      • 2.Bxh5#
    • 1...Qe7
      • 2.Bh5#
  • Tries
    • 1.Ra2?
      • threat
        • 2.d4#
      • 1...Qxf4
        • 2.Sxf4#
      • 1...Qa1
        • 2.Bh5#
      • 1...Qb2
        • 2.Bh5#
      • 1...Qc3
        • 2.dxc3#
      • 1...Qd4
        • 2.Bh5#
      • 1...Qe3
        • 2.dxe3#
      • 1...Qe4
        • 2.d3#
      • 1...Qf5
        • 2.d3#
      • 1...Qxd5!
    • 1.fxe5?
      • threat
        • 2.Sf4#
        • 2.Bh5#
      • 1...dxe5
        • 2.Bh5#
      • 1...g6
        • 2.Sf4#
      • 1...g5!
  • Keys
    • 1.Rb2!
      • threat
        • 2.d4#
      • 1...Qxb2
        • 2.Bh5#
      • 1...Qxf4
        • 2.Sxf4#
      • 1...Qc3
        • 2.dxc3#
      • 1...Qd4
        • 2.Bh5#
      • 1...Qe3
        • 2.dxe3#
      • 1...Qe4
        • 2.d3#
      • 1...Qf5
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,XR(A)::B(K)
    • Q(c);N_GUARD::B(K)
    • Q(c);N_GUARD,P_PINP(F)::B(K)
    • Q(c);XP(H)::S(G),XQ(c)
    • Q(c);N_GUARD::B(K),XQ(c)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)+P(E)
      • Vars
        • Q(c);XP(H)::S(G),XQ(c)
        • Q(c);N_GUARD::B(K)
        • Q(c);OGATE::R(A)+P(E),XQ(c)
        • Q(c);N_GUARD,P_PINP(F)::B(K)
        • Q(c);OGATE,P_PINP(F)::R(A)+P(E),XQ(c)
        • Q(c);N_GUARD::R(A)+P(E)
      • Refutation
        • Q(c);XP(J)
    • Try
      • P(H);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);XP(H)::B(K)
        • P(e);::S(G)
      • Refutation
        • P(e);
  • Actual
    • R(B);
    • Threat
      • R(B)+P(E)
    • Vars
      • Q(c);N_GUARD,XR(B)::B(K)
      • Q(c);XP(H)::S(G),XQ(c)
      • Q(c);OGATE::R(B)+P(E),XQ(c)
      • Q(c);N_GUARD,P_PINP(F)::B(K)
      • Q(c);OGATE,P_PINP(F)::R(B)+P(E),XQ(c)
      • Q(c);N_GUARD::R(B)+P(E)
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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).