MESON Chess Problem Database

Problem Display
PID: 227070 (3n4/5RR1/r2Bqp1n/2N2k2/r1B2p2/4PpPK/8/8 w - - 0 1)

Onkoud, Abdelaziz

64 Shakhmatnoe obozrenie, 2020

3n4/5RR1/r2Bqp1n/2N2k2/r1B2p2/4PpPK/8/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.e4#
    • 1...Qxf7
      • 2.e4#
    • 1...Qc8
      • 2.e4#
    • 1...Shxf7
      • 2.g4#
    • 1...Sg8
      • 2.g4#
    • 1...Sc6
      • 2.Bxe6#
    • 1...Sb7
      • 2.Bxe6#
    • 1...Sdxf7
      • 2.Bxe6#
  • Tries
    • 1.Bxf4?
      • threat
        • 2.Rg5#
      • 1...Qxf7
        • 2.e4#
      • 1...Shxf7
        • 2.g4#
      • 1...Sdxf7!
    • 1.Rxf6+?
      • 1...Qxf6
        • 2.e4#
      • 1...Kxf6+!
    • 1.exf4?
      • threat
        • 2.Rg5#
      • 1...Shxf7
        • 2.g4#
      • 1...Sdxf7
        • 2.Bxe6#
      • 1...Qxf7!
    • 1.gxf4?
      • threat
        • 2.Rg5#
      • 1...Qxf7
        • 2.e4#
      • 1...Sdxf7
        • 2.Bxe6#
      • 1...Shxf7!
  • Keys
    • 1.Kh4!
      • threat
        • 2.Rg5#
      • 1...Qxf7
        • 2.e4#
      • 1...Shxf7
        • 2.g4#
      • 1...Sdxf7
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD::P(A)
    • Q(f);N_GUARD,N_SPINP(g),XR(G)::P(A)
    • S(h);N_GUARD,N_SPINP(g),XR(G)::P(B)
    • S(h);N_GUARD::P(B)
    • S(i);N_GUARD::B(D),XQ(f)
    • S(i);N_GUARD,N_SPINP(g),XR(G)::B(D),XQ(f)
  • Tries
    • Try
      • B(F);XP(c)
      • Threat
        • R1(H)
      • Vars
        • Q(f);N_GUARD,N_SPINP(g),XR(G)::P(A)
        • S(h);N_GUARD,N_SPINP(g),XR(G)::P(B)
      • Refutation
        • S(i);N_SPINP(g),XR(G)
    • Try
      • R(G);CHECK,XP(g)
      • Vars
        • Q(f);SBLOCK,XR(G)::P(A)
      • Refutation
        • K(d);CHECK,P-FLIGHT,XR(G)
    • Try
      • P(A);XP(c)
      • Threat
        • R1(H)
      • Vars
        • S(h);N_GUARD,N_SPINP(g),XR(G)::P(B)
        • S(i);N_GUARD,N_SPINP(g),XR(G)::B(D),XQ(f)
      • Refutation
        • Q(f);N_SPINP(g),XR(G)
    • Try
      • P(B);XP(c)
      • Threat
        • R1(H)
      • Vars
        • Q(f);N_GUARD,N_SPINP(g),XR(G)::P(A)
        • S(i);N_GUARD,N_SPINP(g),XR(G)::B(D),XQ(f)
      • Refutation
        • S(h);N_SPINP(g),XR(G)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • R1(H)
    • Vars
      • Q(f);N_GUARD,N_SPINP(g),XR(G)::P(A)
      • S(h);N_GUARD,N_SPINP(g),XR(G)::P(B)
      • S(i);N_GUARD,N_SPINP(g),XR(G)::B(D),XQ(f)
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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).