MESON Chess Problem Database

Problem Display
PID: 176204 (4N3/rn1BPP2/8/n2kN3/R2P3R/8/6b1/K2Q4 w - - 0 1)

Racz, Erich

Schach-Echo, 1972

4N3/rn1BPP2/8/n2kN3/R2P3R/8/6b1/K2Q4

#2

10 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qf3#
    • 1...Bh1
      • 2.Qxh1#
    • 1...Bf3
      • 2.Qxf3#
    • 1...Bh3
      • 2.Qf3#
    • 1...Sb3+
      • 2.Qxb3#
    • 1...Sc6
      • 2.Qb3#
    • 1...Sd6
      • 2.Sf6#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Qh5#
      • 1...Sb3+
        • 2.Qxb3#
      • 1...Sxc6
        • 2.Qb3#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Bh3
        • 2.Qf3#
      • 1...Sc4
        • 2.Sb4#
      • 1...Sd6
        • 2.Sf6#
      • 1...Be4!
    • 1.Sg6?
      • threat
        • 2.Qh5#
      • 1...Sb3+
        • 2.Qxb3#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Bh3
        • 2.Qf3#
      • 1...Be4
        • 2.Sf4#
      • 1...Sc6
        • 2.Qb3#
      • 1...Sd6
        • 2.Sf6#
      • 1...Sc4!
    • 1.Bc6+?
      • 1...Sxc6
        • 2.Qb3#
      • 1...Ke6!
    • 1.Qb3+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxb3+!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qh5#
      • 1...Sb3+
        • 2.Qxb3#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Bh3
        • 2.Qf3#
      • 1...Be4
        • 2.Sf4#
      • 1...Sc4
        • 2.Sb4#
      • 1...Sc6
        • 2.Qb3#
      • 1...Sd6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB(B)
    • B(a);OGATEB::QAB(B),XB(a)
    • B(a);N_GUARD::QAB(B),XB(a)
    • S(b);CHECK,N_GUARD,P_PINR(C)::QAB(B),XS(b)
    • S(b);N_GUARD,P_PINR(C)::QAB(B)
    • S(e);SBLOCK::S(J)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR(B)
      • Vars
        • S(b);CHECK,N_GUARD,P_PINR(C)::QAB(B),XS(b)
        • S(b);N_GUARD,P_PINR(C),XS(F)::QAB(B)
        • B(a);N_GUARD::QAB(B),XB(a)
        • B(a);N_GUARD::QAB(B)
        • S(b);P_PINR(C),SBLOCK::S(F)
        • S(e);SBLOCK::S(J)
      • Refutation
        • B(a);
    • Try
      • S(F);
      • Threat
        • QAR(B)
      • Vars
        • S(b);CHECK,N_GUARD,P_PINR(C)::QAB(B),XS(b)
        • B(a);N_GUARD::QAB(B),XB(a)
        • B(a);N_GUARD::QAB(B)
        • B(a);SBLOCK::S(F)
        • S(b);N_GUARD,P_PINR(C)::QAB(B)
        • S(e);SBLOCK::S(J)
      • Refutation
        • S(b);P_PINR(C)
    • Try
      • B(G);CHECK
      • Vars
        • S(b);P_PINR(C),XB(G)::QAB(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_PINR(C),P_SPINS(b)::QAB1(B),XS(b)
      • Refutation
        • S(b);CHECK,P_PINR(C),XQ(B)
  • Actual
    • S(F);
    • Threat
      • QAR(B)
    • Vars
      • S(b);CHECK,N_GUARD,P_PINR(C)::QAB(B),XS(b)
      • B(a);N_GUARD::QAB(B),XB(a)
      • B(a);N_GUARD::QAB(B)
      • B(a);SBLOCK::S(F)
      • S(b);P_PINR(C),SBLOCK::S(F)
      • S(b);N_GUARD,P_PINR(C)::QAB(B)
      • S(e);SBLOCK::S(J)
HTML5 logo

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).