MESON Chess Problem Database

Problem Display
PID: 77166 (7b/1Q6/1n3p2/3R2pr/4kP2/7p/4NKP1/8 w - - 0 1)

Berg, Wolfgang

Neue Osnabrucker Zeitung, 1994

7b/1Q6/1n3p2/3R2pr/4kP2/7p/4NKP1/8

#2

6 + 7

6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Qb1#
    • 1...gxf4
      • 2.Sc3#
    • 1...f5
      • 2.Rd4#
  • Tries
    • 1.Rd1+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kf5!
    • 1.Rd2+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kf5!
    • 1.Ra5+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kd3!
    • 1.Rb5+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kd3!
    • 1.Rc5+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kd3!
    • 1.Rxg5+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kd3!
    • 1.Rd6+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kf5!
    • 1.Rd7+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kf5!
    • 1.Rd8+?
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qb1#
      • 1...Kf5!
    • 1.Qc6?
      • threat
        • 2.Qe6#
      • 1...Sxd5
        • 2.Qc2#
      • 1...gxf4
        • 2.Sc3#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...f5
        • 2.Rd4#
      • 1...g4!
    • 1.g3?
      • threat
        • 2.Sc3#
      • 1...Sxd5
        • 2.Qb1#
      • 1...f5
        • 2.Rd4#
      • 1...Sa4!
  • Keys
    • 1.g4!
      • threat
        • 2.Rd4#
      • 1...Sxd5
        • 2.Qb1#
      • 1...gxf4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • S(e);OGATE,P_SPINS(e),SBLOCK,XR(E)::QAB(F)
    • P(c);SBLOCK,XP(D)::S(A)
    • P(f);SBLOCK::QAB(F)+R(E),DCHECK
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(F),XS(e)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • S(e);P_SPINS(e),SBLOCK,XR(E)::QAB(F)
        • P(c);SBLOCK,XP(D)::S(A)
        • S(e);N_GUARD::QAR2(F),XS(e)
        • S(e);N_GUARD::QAR2(F)
        • P(f);SBLOCK::QAB(F)+R(E),DCHECK
      • Refutation
        • P(c);
    • Try
      • P(C);
      • Threat
        • S(A)
      • Vars
        • S(e);OGATE,P_SPINS(e),SBLOCK,XR(E)::QAB(F)
        • P(f);SBLOCK::QAB(F)+R(E),DCHECK
      • Refutation
        • S(e);
  • Actual
    • P(C);
    • Threat
      • QAB(F)+R(E),DCHECK
    • Vars
      • S(e);OGATE,P_SPINS(e),SBLOCK,XR(E)::QAB(F)
      • P(c);SBLOCK,XP(D)::S(A)
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).