MESON Chess Problem Database
Problem Display
PID: 210209 (8/3p1Npb/4p1p1/1nnpPkB1/5N1K/b2p1B1p/7r/5Q2 w - - 0 1)
Ahues, Herbert Siegfried Oskar
The Problemist, 1985
#2
7 + 13
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Qxh3#
- 1...Rb2
- 2.Qxh3#
- 1...Rc2
- 2.Qxh3#
- 1...Rd2
- 2.Qxh3#
- 1...Re2
- 2.Qxh3#
- 1...Rf2
- 2.Qxh3#
- 1...Sb3
- 2.Qxd3#
- 1...Sa4
- 2.Qxd3#
- 1...Se4
- 2.Bg4#
- 1...Sa6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Ra2
- Tries
- 1.Se2?
- threat
- 2.Sg3#
- 2.Bg2#
- 1...Rxe2
- 2.Qxh3#
- 1...Rh1
- 2.Sg3#
- 2.Bxh1#
- 1...Rf2
- 2.Sg3#
- 2.Qxh3#
- 1...Rg2
- 2.Bxg2#
- 1...Bc1
- 2.Sg3#
- 1...Sd4
- 2.Sg3#
- 2.Sxd4#
- 1...Se4
- 2.Bg4#
- 1...dxe2!
- threat
- 1.Sxd3?
- threat
- 2.Bg2#
- 1...Sxd3
- 2.Qxd3#
- 1...Rh1
- 2.Bxh1#
- 1...Ra2
- 2.Qxh3#
- 1...Rb2
- 2.Qxh3#
- 1...Rc2
- 2.Qxh3#
- 1...Rd2
- 2.Qxh3#
- 1...Re2
- 2.Qxh3#
- 1...Rf2
- 2.Qxh3#
- 1...Rg2
- 2.Bxg2#
- 1...Sd4
- 2.Sd6#
- 1...Se4
- 2.Bg4#
- 1...Bc1!
- threat
- 1.Sxd5?
- threat
- 2.Se3#
- 2.Se7#
- 2.Bg2#
- 1...Bc1
- 2.Se7#
- 1...Rh1
- 2.Se3#
- 2.Se7#
- 2.Bxh1#
- 1...Ra2
- 2.Se3#
- 2.Se7#
- 2.Qxh3#
- 1...Rb2
- 2.Se3#
- 2.Se7#
- 2.Qxh3#
- 1...Rc2
- 2.Se3#
- 2.Se7#
- 2.Qxh3#
- 1...Rd2
- 2.Se3#
- 2.Se7#
- 2.Qxh3#
- 1...Re2
- 2.Se7#
- 2.Qxh3#
- 1...Rf2
- 2.Se3#
- 2.Se7#
- 2.Qxh3#
- 1...Rg2
- 2.Se3#
- 2.Se7#
- 2.Bxg2#
- 1...Sd4
- 2.Se3#
- 2.Se7#
- 1...Sb3
- 2.Se3#
- 2.Bg2#
- 2.Qxd3#
- 1...Sa4
- 2.Se3#
- 2.Bg2#
- 2.Qxd3#
- 1...Se4
- 2.Se3#
- 2.Bg4#
- 1...Sa6
- 2.Se3#
- 2.Bg2#
- 2.Qxd3#
- 1...Sb7
- 2.Se3#
- 2.Bg2#
- 2.Qxd3#
- 1...exd5!
- threat
- 1.Sh5?
- threat
- 2.Sg3#
- 2.Sxg7#
- 2.Bg2#
- 1...Bc1
- 2.Sg3#
- 2.Sxg7#
- 1...Rh1
- 2.Sg3#
- 2.Sxg7#
- 2.Bxh1#
- 1...Ra2
- 2.Sg3#
- 2.Sxg7#
- 2.Qxh3#
- 1...Rb2
- 2.Sg3#
- 2.Sxg7#
- 2.Qxh3#
- 1...Rc2
- 2.Sg3#
- 2.Sxg7#
- 2.Qxh3#
- 1...Rd2
- 2.Sg3#
- 2.Sxg7#
- 2.Qxh3#
- 1...Re2
- 2.Sg3#
- 2.Sxg7#
- 2.Qxh3#
- 1...Rf2
- 2.Sg3#
- 2.Sxg7#
- 2.Qxh3#
- 1...Rg2
- 2.Sxg7#
- 2.Bxg2#
- 1...Sd4
- 2.Sg3#
- 2.Sxg7#
- 1...Se4
- 2.Sxg7#
- 2.Bg4#
- 1...gxh5!
- threat
- 1.Sxg6?
- threat
- 2.Se7#
- 1...Kxg6
- 2.Bh5#
- 1...Bxg6
- 2.Bg2#
- 1...Sb3
- 2.Qxd3#
- 1...Sa4
- 2.Qxd3#
- 1...Sa6
- 2.Qxd3#
- 1...Sb7
- 2.Qxd3#
- 1...Se4!
- threat
- 1.Qxd3+?
- 1...Se4
- 2.Bg4#
- 1...Sxd3!
- 1...Se4
- 1.Se2?
- Keys
- 1.Sxe6!
- threat
- 2.Sxg7#
- 1...Kxe6
- 2.Bg4#
- 1...Sxe6
- 2.Qxd3#
- 1...dxe6
- 2.Bg2#
- threat
- 1.Sxe6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- R(a);N_GUARD::QAB(A),XP(d)
- S(f);N_GUARD::QAB(A),XP(c)
- S(f);SBLOCK::B(B)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD,XS(C)::QAB(A),XP(d)
- R(a);::QAR(A)+B(B),XR(a)
- B(b);::S(C)
- S(f);SBLOCK::QAR(A)+B(B),DCHECK
- Refutation
- P(c);XS(C)
- Try
- S(C);XP(c)
- Threat
- QAR(A)+B(B)
- Vars
- S(f);OGATE,XS(C)::QAB(A),XS(f)
- R(a);N_GUARD::QAR(A)+B(B),XR(a)
- R(a);N_GUARD::QAB(A),XP(d)
- R(a);::QAR(A)+B(B),XR(a)
- S(e);N_GUARD::S(G)
- S(f);SBLOCK::QAR(A)+B(B),DCHECK
- Refutation
- B(b);
- Try
- S(C);XP(g)
- Threat
- DUALS(3)
- Vars
- B(b);::S(C)
- Refutation
- P(i);XS(C)
- Try
- S(C);
- Threat
- DUALS(3)
- Refutation
- P(j);XS(C)
- Try
- S(C);XP(j)
- Threat
- S(C)
- Vars
- K(h);S_FLIGHT,XS(C)::B(B)
- B(m);SBLOCK,XS(C)::QAR(A)+B(B)
- S(f);N_GUARD::QAB(A),XP(c)
- Refutation
- S(f);
- Try
- Q(A);CHECK,XP(c)
- Vars
- S(f);P_SPINS(f)::B(B)
- Refutation
- S(f);XQ(A)
- Try
- Actual
- S(C);XP(i)
- Threat
- S(C),XP(l)
- Vars
- K(h);S_FLIGHT,XS(C)::B(B)
- S(f);N_GUARD,SBLOCK,XS(C)::QAB(A),XP(c)
- P(k);SBLOCK,XS(C)::QAR(A)+B(B)
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).