MESON Chess Problem Database

Problem Display
PID: 180607 (6B1/7p/4K2k/R2p4/1pP2N2/2BrnN2/q3R3/1Q1n4 w - - 0 1)

Gherman, A

Bulletin Ouvrier des Echecs, 1952

6B1/7p/4K2k/R2p4/1pP2N2/2BrnN2/q3R3/1Q1n4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Rh2#
    • 1...Qb3
      • 2.Rh2#
    • 1...Qxc4
      • 2.Rh2#
    • 1...Qa1
      • 2.Rh2#
    • 1...Qa3
      • 2.Rh2#
    • 1...Qa4
      • 2.Rh2#
    • 1...Qxa5
      • 2.Rh2#
    • 1...Rd2
      • 2.Qxh7#
    • 1...Rxc3
      • 2.Qxh7#
    • 1...Rd4
      • 2.Qxh7#
    • 1...Sb2
      • 2.Rh2#
      • 2.Qh1#
    • 1...Sc2
      • 2.Rh2#
    • 1...dxc4
      • 2.Rh5#
  • Tries
    • 1.Ra7?
      • threat
        • 2.Bg7#
        • 2.Rxh7#
      • 1...Qxa7
        • 2.Rh2#
      • 1...Rxc3
        • 2.Rxh7#
        • 2.Qxh7#
      • 1...Sxc3
        • 2.Rxh7#
        • 2.Qh1#
      • 1...bxc3
        • 2.Rxh7#
      • 1...Qa1
        • 2.Rh2#
        • 2.Rxh7#
      • 1...Qb2
        • 2.Rxh7#
      • 1...Rd4
        • 2.Rxh7#
        • 2.Qxh7#
      • 1...Sf5
        • 2.Rxh7#
      • 1...d4
        • 2.Rxh7#
      • 1...Qa6+!
    • 1.Qxb4?
      • threat
        • 2.Qf8#
      • 1...Qa3
        • 2.Rh2#
      • 1...Sf5!
  • Keys
    • 1.Kf7!
      • threat
        • 2.Bg7#
      • 1...Rxc3
        • 2.Qxh7#
      • 1...Sxc3
        • 2.Qh1#
      • 1...bxc3
        • 2.Qb6#
      • 1...Qa1
        • 2.Rh2#
      • 1...Qb2
        • 2.Ra6#
      • 1...Rd4
        • 2.Qxh7#
      • 1...Sf5
        • 2.Re6#
      • 1...d4
        • 2.Rh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD,XQ(A)::R(B)
    • Q(b);N_GUARD::R(B)
    • Q(b);N_GUARD,XP(E)::R(B)
    • Q(b);N_GUARD,XR(G)::R(B)
    • R(c);OGATE::QAR1(A),XP(h)
    • R(c);OGATE,XB(C)::QAR1(A),XP(h)
    • S(d);S_CUTQ(b)::R(B)
    • P(f);OGATE,XP(E)::R1(G)
  • Tries
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_GUARD,SBLOCK,XR(G)::R(B)
        • P(e);XB(C)::R1(G),XP(h)
        • Q(b);::R1(G),XP(h)
        • S(d);::R1(G),XP(h)
        • P(f);P_PINP(E)::R1(G),XP(h)
      • Refutation
        • Q(b);CHECK
    • Try
      • Q(A);XP(e)
      • Threat
        • QAB(A)
      • Vars
        • Q(b);N_GUARD::R(B)
      • Refutation
        • S(d);
  • Actual
    • K(H);S_FLIGHT
    • Threat
      • B(C)
    • Vars
      • R(c);OGATE,XB(C)::QAR1(A),XP(h)
      • S(a);OGATE,XB(C)::QAR(A)
      • P(e);OGATE,XB(C)::QAR(A)
      • Q(b);N_GUARD::R(B)
      • Q(b);N_GUARD::R(G)
      • R(c);OGATE::QAR1(A),XP(h)
      • S(d);OGATE::R(B)
      • P(f);OGATE,P_PINP(E)::R1(G)
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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).