MESON Chess Problem Database
Problem Display
PID: 185913 (r7/4p2R/p5p1/rRQnnkN1/1p2N2K/1q1B1p2/7B/8 w - - 0 1)
Ahues, Herbert Siegfried Oskar
Chess, 1957
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Sc3
- 2.Qxe5#
- 1...Se3
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...Sb6
- 2.Qxe5#
- 1...Sf6
- 2.Sd6#
- 2.Qxe5#
- 1...Sc7
- 2.Qxe5#
- 1...Sxd3
- 2.Rf7#
- 1...Sc4
- 2.Rf7#
- 1...Sc6
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Sc3
- Tries
- 1.Sc3+?
- 1...Sxd3
- 2.Rf7#
- 1...Kf6!
- 1...Sxd3
- 1.Sg3+?
- 1...Kf4
- 2.Sf1#
- 2.Sh1#
- 2.Se2#
- 2.Sf5#
- 2.Sh5#
- 2.Sh3#
- 2.Se6#
- 2.Qd4#
- 1...Kf6!
- 1...Kf4
- 1.Rf7+?
- 1...Sf6
- 2.Sc3#
- 2.Sd6#
- 2.Qxe5#
- 1...Sxf7!
- 1...Sf6
- 1.Qb6?
- threat
- 2.Qe6#
- 1...Sc3
- 2.Sxc3#
- 1...Se3
- 2.Sc3#
- 1...Sf4
- 2.Sg3#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sc3#
- 1...Sc6
- 2.Rf7#
- 1...e6
- 2.Qxe6#
- 1...Sxb6!
- threat
- 1.Qd6?
- threat
- 2.Qxe5#
- 2.Qe6#
- 1...Sxd3
- 2.Sg3#
- 2.Rf7#
- 2.Qe6#
- 1...Qb2
- 2.Qe6#
- 1...Qc3
- 2.Qe6#
- 1...Sc3
- 2.Sxc3#
- 2.Qxe5#
- 1...Se3
- 2.Sc3#
- 2.Qxe5#
- 1...Sf4
- 2.Sg3#
- 2.Qxe5#
- 1...Sb6
- 2.Sc3#
- 2.Qxe5#
- 1...Sf6
- 2.Qxe5#
- 1...Sc7
- 2.Sc3#
- 2.Qxe5#
- 1...Sc4
- 2.Sc3#
- 2.Sg3#
- 2.Rf7#
- 2.Qf4#
- 2.Qe6#
- 1...Sg4
- 2.Sc3#
- 2.Sg3#
- 2.Qf4#
- 2.Qe6#
- 1...Sc6
- 2.Sc3#
- 2.Sg3#
- 2.Rf7#
- 2.Qf4#
- 2.Qe6#
- 1...Sd7
- 2.Sc3#
- 2.Sg3#
- 2.Qf4#
- 2.Qe6#
- 1...Sf7
- 2.Sc3#
- 2.Sg3#
- 2.Rxf7#
- 2.Qf4#
- 2.Qe6#
- 1...e6
- 2.Qxe5#
- 2.Qxe6#
- 1...exd6!
- threat
- 1.Qxe7?
- threat
- 2.Sd6#
- 2.Qxe5#
- 2.Qe6#
- 1...Sxd3
- 2.Sd6#
- 2.Rf7#
- 2.Qf6#
- 2.Qe6#
- 2.Qd7#
- 2.Qf7#
- 1...Qb2
- 2.Sd6#
- 2.Qe6#
- 1...Qc4
- 2.Qxe5#
- 2.Qe6#
- 1...Qc3
- 2.Sd6#
- 2.Qe6#
- 1...Re8
- 2.Sd6#
- 1...Sc3
- 2.Sxc3#
- 2.Sd6#
- 2.Qf6#
- 2.Qxe5#
- 1...Se3
- 2.Sc3#
- 2.Sd6#
- 2.Qf6#
- 2.Qxe5#
- 1...Sf4
- 2.Sg3#
- 2.Sd6#
- 2.Qf6#
- 2.Qxe5#
- 1...Sb6
- 2.Sc3#
- 2.Sd6#
- 2.Qf6#
- 2.Qxe5#
- 1...Sf6
- 2.Sd6#
- 2.Qxf6#
- 2.Qxe5#
- 1...Sc7
- 2.Sc3#
- 2.Sd6#
- 2.Qf6#
- 2.Qxe5#
- 1...Sc4
- 2.Sc3#
- 2.Sd6#
- 2.Rf7#
- 2.Qf6#
- 2.Qe6#
- 2.Qd7#
- 2.Qf7#
- 1...Sg4
- 2.Sc3#
- 2.Sd6#
- 2.Qe6#
- 2.Qd7#
- 1...Sc6
- 2.Sc3#
- 2.Sd6#
- 2.Rf7#
- 2.Qf6#
- 2.Qe6#
- 2.Qd7#
- 2.Qf7#
- 1...Sd7
- 2.Sc3#
- 2.Sd6#
- 2.Qe6#
- 2.Qxd7#
- 1...Sf7
- 2.Sc3#
- 2.Sd6#
- 2.Rxf7#
- 2.Qf6#
- 2.Qe6#
- 2.Qd7#
- 2.Qxf7#
- 1...Sxe7!
- threat
- 1.Qxd5?
- threat
- 2.Rf7#
- 2.Qxe5#
- 1...Rxb5
- 2.Rf7#
- 1...Qb2
- 2.Rf7#
- 2.Qe6#
- 2.Qf7#
- 1...Qc3
- 2.Rf7#
- 2.Qe6#
- 2.Qf7#
- 1...Rf8
- 2.Qxe5#
- 1...Rh8
- 2.Qxe5#
- 1...Qxd5!
- threat
- 1.Qc8+?
- 1...Sd7
- 2.Rf7#
- 1...e6
- 2.Qxe6#
- 1...Rxc8!
- 1...Sd7
- 1.Sc3+?
- Keys
- 1.Qc6!
- threat
- 2.Qe6#
- 1...Sxc6
- 2.Rf7#
- 1...Sc3
- 2.Sxc3#
- 1...Se3
- 2.Sc3#
- 1...Sf4
- 2.Sg3#
- 1...Sb6
- 2.Sc3#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sc3#
- 1...e6
- 2.Qxe6#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- S(e);OGATE,P_SPINS(f)::QAR1(F),XS(f)
- S(f);N_GUARD,P_SPINS(e),XB(B)::R(H)
- S(f);N_GUARD,P_SPINS(e)::R(H)
- S(f);N_GUARD,P_SPINS(e)::R(H),XS(f)
- Tries
- Try
- S(C);CHECK
- Vars
- S(f);P_SPINS(e),XB(B)::R(H)
- Refutation
- K(g);P-FLIGHT
- Try
- S(C);CHECK
- Refutation
- K(g);P-FLIGHT
- Try
- R(H);CHECK
- Refutation
- S(f);P_SPINS(e),XR(H)
- Try
- Q(F);
- Threat
- QAB1(F)
- Vars
- S(e);P_SPINS(f)::B(B)+S(C),XS(e)
- S(e);P_SPINS(f)::B(B)+S(C)
- S(e);P_SPINS(f),SBLOCK::B(B)+S(C),DCHECK
- S(f);N_GUARD,P_SPINS(e)::R(H)
- P(j);::QAB1(F),XP(j)
- Refutation
- S(e);P_SPINS(f),XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(a);::QAB1(F)
- S(e);P_SPINS(f)::QAR1(F),XS(f)
- Refutation
- P(j);XQ(F)
- Try
- Q(F);XP(j)
- Threat
- DUALS(3)
- Vars
- R(k);::B(B)+S(C),DCHECK
- Refutation
- S(e);P_SPINS(f),XQ(F)
- Try
- Q(F);P_PINS(f),XS(e)
- Threat
- DUALS(2)
- Vars
- R(d);XR(E)::R(H)
- R(k);::QAR1(F),XS(f)
- R(k);P_PINR(H)::QAR1(F),XS(f)
- Refutation
- Q(a);N_SPINS(f),XQ(F)
- Try
- Q(F);CHECK
- Vars
- S(f);P_SPINS(e)::R(H)
- P(j);P_SPINP(j)::QAB1(F),XP(j)
- Refutation
- R(k);XQ(F)
- Try
- Actual
- Q(F);
- Threat
- QAB1(F)
- Vars
- S(f);N_GUARD,P_SPINS(e),XQ(F)::R(H)
- S(e);P_SPINS(f)::B(B)+S(C),XS(e)
- S(e);P_SPINS(f)::B(B)+S(C)
- S(e);P_SPINS(f),SBLOCK::B(B)+S(C),DCHECK
- P(j);::QAB1(F),XP(j)
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).